Rapid detection method for condition of landfill leachate polluting groundwater and application thereof

Abstract

Provided are a rapid detection method for a condition of landfill leachate polluting groundwater and an application thereof. The rapid detection method includes: carrying out fluorescence detection on groundwater in a specific region of a landfill, and determining whether the groundwater is polluted according to a ratio of fluorescence intensities at specific excitation/emission wavelengths in a specific fluorescence region. The rapid detection method provided by the solution establishes characteristic fluorescence spectrum regions, fluorescence intensities and regular characteristics thereof of organic matters in leachate-polluted groundwater of a landfill in a fluorescence spectrum region, and can achieve the rapid detection of a condition of landfill leachate polluting groundwater by means of a portable fluorescence detector on site. The detection method provided by the solution is characterized by rapid detection, no need of chemical reagents, simple operation, high detection sensitivity and lower cost.

Claims

1. A rapid detection method for a condition of landfill leachate polluting groundwater, the method comprising: carrying out fluorescence detection on groundwater in a specific region of a landfill, and determining whether the groundwater is polluted according to a ratio of fluorescence intensities at specific excitation/emission (Ex/Em) wavelengths in a specific fluorescence region, wherein water samples from a site background monitoring well, a pollution monitoring well, and a pollution diffusion monitoring well of the landfill are detected respectively, and whether the groundwater is polluted is determined according to the ratio of fluorescence intensities of the water sample in different specific fluorescence regions in the pollution monitoring well or the pollution diffusion monitoring well or whether the groundwater is polluted is determined according to the ratio of fluorescence intensities at the specific Ex/Em wavelengths in the specific fluorescence region among the site background monitoring well, the pollution monitoring well, or the pollution diffusion monitoring well, the specific fluorescence region comprises a region where the Ex/Em is at 240-260 nm/450 nm, and further comprises a region where the Ex/Em is at 215-225 nm/335-345 nm and 240-260 nm/410 nm, in water sample detection of the pollution monitoring well, if I.sub.240-260/450/I.sub.240-260/410≥1, the groundwater is considered to be polluted, in water sample detection of the pollution diffusion monitoring well, if I.sub.240-260/450/I.sub.240-260/410≥1, the groundwater is considered to be polluted, and the rapid detection method achieves rapid detection on whether landfill leachate pollutes groundwater using a portable fluorescence detector on site.

2. The rapid detection method of claim 1, wherein if a ratio of a fluorescence intensity I.sub.240-260/450 of the pollution monitoring well at 240-260 nm/450 nm to a fluorescence intensity I.sub.240-260/450 of the site background monitoring well at 240-260 nm/450 nm is greater than 6.8, the groundwater is considered to be polluted.

3. The rapid detection method of claim 2, wherein if the ratio of the fluorescence intensity I.sub.240-260/450 of the pollution monitoring well at 240-260 nm/450 nm to the fluorescence intensity I.sub.240-260/450 of the site background monitoring well at 240-260 nm/450 nm is less than 4, the groundwater is considered to be not polluted.

4. The rapid detection method of claim 3, wherein if the ratio of the fluorescence intensity I.sub.240-260/450 of the pollution monitoring well at 240-260 nm/450 nm to the fluorescence intensity I.sub.240-260/450 of the site background monitoring well at 240-260 nm/450 nm is 4 to 6.8, the ratio of fluorescence intensities of the water samples of the site background monitoring well, the pollution monitoring well and the pollution diffusion monitoring well in different specific fluorescence regions is further measured in order to determine whether the groundwater is polluted.

5. The rapid detection method of claim 1, wherein if a ratio I.sub.a of a fluorescence intensity I.sub.215-225/335-345 at 215-225 nm/335-345 nm to a fluorescence intensity I.sub.240-260/410 at 240-260 nm/410 nm of the site background monitoring well, a ratio I.sub.b of a fluorescence intensity I.sub.215-225/335-345 at 215-225 nm/335-345 nm to a fluorescence intensity I.sub.240-260/410 at 240-260 nm/410 nm of the pollution monitoring well, and a ratio I.sub.c of a fluorescence intensity I.sub.215-225/335-345 at 215-225 nm/335-345 nm to a fluorescence intensity I.sub.240-260/410 at 240-260 nm/410 nm of the pollution diffusion monitoring well are all greater than 1 or all less than 1, the groundwater is considered to be not polluted.

6. The rapid detection method of claim 5, wherein if the I.sub.a, I.sub.b and I.sub.c are not all greater than 1 or not all less than 1, the groundwater is considered to be polluted.

7. The rapid detection method of claim 5, wherein if a ratio of the fluorescence intensity I.sub.240-260/410 of the pollution monitoring well at 240-260 nm/410 nm to the fluorescence intensity I.sub.240-260/410 at 240-260 nm/410 nm of the site background monitoring well is greater than 6.8, the groundwater is considered to be polluted.

8. The rapid detection method of claim 7, wherein if the ratio of the fluorescence intensity I.sub.240-260/410 of the pollution monitoring well at 240-260 nm/410 nm to the fluorescence intensity I.sub.240-260/410 of the site background monitoring well at 240-260 nm/410 nm is less than 4, the groundwater is considered to be not polluted.

9. The rapid detection method of claim 7, wherein if the ratio of the fluorescence intensity I.sub.240-260/410 of the pollution monitoring well at 240-260 nm/410 nm to the fluorescence intensity I.sub.240-260/410 of the site background monitoring well at 240-260 nm/410 nm is 4 to 6.8, and the I.sub.a, I.sub.b and I.sub.c are all greater than 1 or all less than 1, the groundwater is considered to be not polluted.

10. The rapid detection method of claim 9, wherein if the ratio of the fluorescence intensity I.sub.240-260/410 of the pollution monitoring well at 240-260 nm/410 nm to the fluorescence intensity I.sub.240-260/410 of the site background monitoring well at 240-260 nm/410 nm is 4 to 6.8, and the I.sub.a, I.sub.b and I.sub.c are not all greater than 1 or not all less than 1, the groundwater is considered to be polluted.

Description

BRIEF DESCRIPTION OF DRAWINGS

(1) FIG. 1 is a flowchart of a rapid detection method for determining whether groundwater is polluted by landfill leachate according to the present invention.

(2) FIG. 2A illustrates three-dimensional fluorescence spectrums of groundwater samples from a landfill A in Embodiment one of the present invention.

(3) FIG. 2B illustrates three-dimensional fluorescence spectrums of groundwater samples from a landfill B in Embodiment one of the present invention.

(4) FIG. 2C illustrates three-dimensional fluorescence spectrums of groundwater samples from a landfill C in Embodiment one of the present invention.

(5) FIG. 2D illustrates three-dimensional fluorescence spectrums of groundwater samples from a landfill D in Embodiment one of the present invention.

(6) FIG. 2E illustrates three-dimensional fluorescence spectrums of groundwater samples from a landfill E in Embodiment one of the present invention.

(7) FIG. 2F illustrates three-dimensional fluorescence spectrums of groundwater samples from a landfill F in Embodiment one of the present invention.

(8) FIG. 2G illustrates three-dimensional fluorescence spectrums of groundwater samples from a landfill G in Embodiment one of the present invention.

(9) FIG. 2H illustrates three-dimensional fluorescence spectrums of groundwater samples from a landfill H in Embodiment one of the present invention.

(10) FIG. 2I illustrates three-dimensional fluorescence spectrums of groundwater samples from a landfill I in Embodiment one of the present invention.

(11) FIG. 2J illustrates three-dimensional fluorescence spectrums of groundwater samples from a landfill J in Embodiment one of the present invention.

(12) FIG. 2K illustrates three-dimensional fluorescence spectrums of groundwater samples from a landfill K in Embodiment one of the present invention.

(13) FIG. 2L illustrates three-dimensional fluorescence spectrums of groundwater samples from a landfill L in Embodiment one of the present invention.

(14) FIG. 3 illustrates three-dimensional fluorescence spectrums of leachate samples from four landfills B, J, K and L in Embodiment one of the present invention.

(15) FIG. 4 illustrates three-dimensional fluorescence spectrums of five fluorescent components obtained from Parallel Factor Analysis of 43 groundwater samples in Comparative example one.

DETAILED DESCRIPTION

(16) The technical solutions of the present invention are further described below through specific embodiments. Those skilled in the art should understand that the embodiments are merely used to help understand the present invention and should not be regarded as specific limitations to the present invention.

Embodiment One

(17) A rapid detection method for a condition of landfill leachate polluting groundwater, comprising:

(18) (A) Sample Collection

(19) 43 groundwater samples and four landfill leachate samples, 47 samples in total, specifically as follows:

(20) The samples were collected from groundwater in 12 municipal solid waste landfills in 11 counties of China. These landfills were named A, B, C, D, E, F, G, H, I, J, K, and L respectively. Two to five groundwater samples were collected for each landfill from site background monitoring wells (b), pollution monitoring wells (j) and pollution diffusion monitoring wells (k) of the landfills. Thus 43 groundwater samples were collected in total.

(21) Among those, the groundwater of eight landfills, A, B, C, D, E, G, H and I, had not been polluted by the landfill leachate, while the groundwater section of landfills F, J, K and L had been polluted with the leachate. The sample name, for example, A-b, means a water sample from the site background monitoring well of the landfill A, A-j1 means a water sample from the No. 1 pollution monitoring well of the landfill A, A-j2 means a water sample from the No. 2 pollution monitoring well of the landfill A, A-k1 means a water sample from the No. 1 pollution diffusion monitoring well of the landfill A, and A-k2 means a water sample from the No. 2 pollution diffusion monitoring well of the landfill A. The other samples were numbered in the similar way.

(22) Four leachate samples were further collected from four landfills B, J, K and L, which were named BL, JL, KL and LL respectively.

(23) (B) Sample Detection, Comprising Steps of:

(24) (1) The samples were filtered using a syringe filtration membrane (0.45 μm) and a syringe (25 mL); and

(25) (2) The Ex/Em wavelengths of the samples were selected within ranges of 215-225 nm/335-345 nm, 240-260 nm/410 nm and 240-260 nm/450 nm, and intensities I.sub.220/345 at Ex/Em=220 nm/345 nm, I.sub.250/410 at Ex/Em=250 nm/410 nm, and I.sub.250/450 at Ex/Em=250 nm/450 nm were measured.

(26) The detection results are shown in FIGS. 2A to 2L, FIG. 3 and Table 1.

(27) FIGS. 2A to 2L illustrate three-dimensional fluorescence spectrums of 43 groundwater samples, and FIG. 3 illustrates three-dimensional fluorescence spectrums of four leachate samples. It can be seen from these figures that the regions of the fluorescence peaks in the three-dimensional fluorescence spectrums of the groundwater which has not been polluted by the leachate in the same landfill collected from the site background monitoring well, the pollution monitoring well and the pollution diffusion monitoring well are similar, and the fluorescence intensities are at the same level, which indicates that the composition and the concentration of organic matters are similar. If the groundwater in the same landfill has been polluted by the leachate, regions of the fluorescence peaks in three-dimensional fluorescence spectrums of the groundwater collected from the site background monitoring well, the pollution monitoring well and the pollution diffusion monitoring well have great difference, and the fluorescence intensities are not at the same level, which indicates that the composition and the concentration of organic matters are significantly different.

(28) TABLE-US-00001 TABLE 1 Ex/Em A-b A-j1 A-j2 A-k1 A-k2 B-b B-j1 B-j2 I.sub.220/345 148.50 442.50 250.70 182.0 247.80 291.20 304.90 222.70 I.sub.250/410 103.80 108.40 104.10 102.0 107.50 107.20 113.50 121.20 I.sub.250/450 88.11 75.13 75.70 78.42 82.08 87.390 91.84 94.47 I.sub.220/345/I.sub.250/410 1.43 4.08 2.41 1.78 2.31 2.720 2.69 1.84 I.sub.250/450/I.sub.250/410 0.85 0.69 0.73 0.77 0.76 0.82 0.81 0.78 Ex/Em B-k1 B-k2 C-b C-j1 C-j2 D-b D-j D-k I.sub.220/345 215.60 253.30 247.20 347.90 315.50 143.0 396.40 192.20 I.sub.250/410 113.50 114.10 93.970 281.0 133.20 247.70 665.40 247.30 I.sub.250/450 89.2 95.47 78.66 242.40 108.80 183.70 587.20 201.00 I.sub.220/345/I.sub.250/410 1.90 2.22 2.63 1.24 2.37 0.58 0.60 0.78 I.sub.250/450/I.sub.250/410 0.79 0.84 0.84 0.86 0.82 0.74 0.89 0.88 Ex/Em E-b E-j E-k1 E-k2 F-b F-j G-b G-j1 I.sub.220/345 150.70 229.90 2.50 27.73 185.00 613.30 335.40 413.00 I.sub.250/410 191.10 509.60 309.00 398.40 190.50 1231.00 797.90 828.00 I.sub.250/450 160.30 455.30 261.60 361.60 163.20 1093.00 635.60 727.80 I.sub.220/345/I.sub.250/410 0.79 0.45 0.01 0.07 0.97 0.50 0.42 0.50 I.sub.250/450/I.sub.250/410 0.84 0.89 0.85 0.91 0.86 0.89 0.85 0.82 Ex/Em G-j2 G-k H-b H-j1 H-j2 H-k1 H-k2 I-j1 I.sub.220/345 679.00 353.00 310.90 330.20 377.40 383.70 336.50 229.90 I.sub.250/410 1320.00 817.70 739.20 754.00 753.80 751.00 734.70 509.60 I.sub.250/450 1127.00 670.70 615.80 627.70 618.90 626.60 611.00 455.30 I.sub.220/345/I.sub.250/410 0.51 0.43 0.42 0.44 0.50 0.51 0.46 0.45 I.sub.250/450/I.sub.250/410 0.85 0.82 0.83 0.83 0.82 0.83 0.83 0.89 Ex/Em I-j2 J-j1 J-j2 K-b K-j1 K-j2 K-k L-b I.sub.220/345 27.73 1293.00 1113.00 261.10 556.90 41.45 269.60 26.10 I.sub.250/410 398.40 5240.00 1848.00 153.60 1572.00 1139.00 525.10 192.50 I.sub.250/450 361.60 7903.00 3238.00 119.70 2883.00 1023.00 497.20 158.30 I.sub.220/345/I.sub.250/410 0.07 0.25 0.60 1.70 0.35 0.04 0.51 0.14 I.sub.250/450/I.sub.250/410 0.91 1.51 1.75 0.78 1.83 0.90 0.95 0.82 Ex/Em L-j L-k1 L-k2 BL JL KL LL I.sub.220/345 1026.00 6.70 16.56 2061.00 4649.00 2472.00 3914.00 I.sub.250/410 2342.00 600.00 205.10 1951.00 3110.00 2493.00 2580.00 I.sub.250/450 4348.00 533.70 169.80 2764.00 3585.00 3284.00 3660.00 I.sub.220/345/I.sub.250/410 0.44 0.01 0.08 1.06 1.49 0.99 1.10 I.sub.250/450/I.sub.250/410 1.86 0.89 0.83 1.42 1.15 1.32 1.41

(29) Results of I.sub.250/410 ratio and I.sub.250/450 ratio of the monitoring well to the background monitoring well for the same landfill are shown in Table 2.

(30) TABLE-US-00002 TABLE 2 Ex/Em A-j1/A-b A-j2/A-b B-j1/B-b B-j2/B-b C-j1/C-b I.sub.250/410 1.04 1.00 1.06 1.13 2.99 I.sub.250/450 0.85 0.86 1.05 1.08 3.08 Ex/Em C-j2/C-b D-j1/D-b E-j/E-b F-j/F-b G-j1/G-b I.sub.250/410 3.36 2.69 2.67 6.46 1.04 I.sub.250/450 1.38 3.20 2.84 6.70 1.15 Ex/Em G-j2/G-b H-j1/H-b H-j2/H-b K-j1/K-b K-j2/K-b I.sub.250/410 1.65 1.02 0.51 10.23 7.42 I.sub.250/450 1.77 1.02 1.01 24.09 8.55 Ex/Em L-j/L-b I.sub.250/410 12.17 I.sub.250/450 27.47

(31) In Table 2, for wells in the landfill F, since the ratio of the fluorescence intensity I.sub.240-260/450 of the pollution monitoring well at 240-260 nm/450 nm to the fluorescence intensity I.sub.240-260/450 of the site background monitoring well at 240-260 nm/450 nm is between 4 and 6.8, the magnitude of the ratio of the fluorescence intensity I.sub.215-225/335 at 215-225 nm/335 nm to the fluorescence intensity I.sub.240-260/410 at 240-260 nm/410 nm of the water sample from the site background monitoring well, the pollution monitoring well or the pollution diffusion monitoring well needs to be determined. Therefore, two more sets of data of the site background monitoring well and the pollution monitoring well were added, as shown in Table 2-2.

(32) TABLE-US-00003 TABLE 2-2 Ex/Em F-b F-j I.sub.225/345 261.4 185.00 859.6 613.30 I.sub.240/410 195.6 190.50 1204 1231.00 I.sub.220/345/I.sub.250/410 1.34 0.97 0.71 0.50

(33) As can be seen from tables 1, 2 and 2-2, the detection data analysis for fluorescence of specific wavelengths of groundwater samples from eight landfills without leachate pollution (A, B, C, D, E, G, H, and I), groundwater samples from four landfills with leachate pollution (F, J, K and L) and leachate samples from four landfills indicates that for the groundwater from the landfill without leachate pollution, if the ratio of the intensity I.sub.250/410 of the pollution monitoring well to the intensity I.sub.250/410 of the site background monitoring well and the ratio of the intensity I.sub.250/450 of the pollution monitoring well to the intensity I.sub.250/450 of the site background monitoring well are both less than 4; for the groundwater from the landfill with leachate pollution, if the ratio of the intensity I.sub.250/410 of the pollution monitoring well to the intensity I.sub.250/410 of the site background monitoring well and the ratio of the intensity I.sub.250/450 of the pollution monitoring well to the intensity I.sub.250/450 of the site background monitoring well are both greater than 6.8, the groundwater is considered to be polluted; when the ratio of the fluorescence intensity I.sub.240-260/450 of the pollution monitoring well at 240-260 nm/450 nm to the fluorescence intensity I.sub.240-260/450 of the site background monitoring well at 240-260 nm/450 nm is 4 to 6.8, the magnitude of the ratios of the fluorescence intensity I.sub.215-225/335 at 215-225 nm/335 nm to the intensity I.sub.240-260/410 at 240-260 nm/410 nm of the water samples from the site background monitoring well, the pollution monitoring well or the pollution diffusion monitoring well needs to be further determined, and if the ratios are all greater than 1 or all less than 1, it indicates that the groundwater is not polluted, while if the ratios are not all greater than 1 or not all less than 1, it indicates that the groundwater is polluted; if the ratios of I.sub.250/450/I.sub.250/410 of the groundwater from the pollution monitoring well without leachate pollution are all less than 1, and the ratios of I.sub.250/450/I.sub.250/410 of the groundwater samples and the leachate samples from the pollution monitoring well of the landfill with leachate pollution are all greater than 1, it also indicates that the groundwater has been polluted.

Embodiment Two

(34) The same as Embodiment one except for step (2) as follows.

(35) The Ex/Em wavelengths of the samples were selected within ranges of 215-225 nm/335-345 nm, 240-260 nm/410 nm and 240-260 nm/450 nm, and intensities I.sub.225/345 at Ex/Em=225 nm/345 nm, I.sub.245/410 at Ex/Em=245 nm/410 nm, and I.sub.245/450 at Ex/Em=245 nm/450 nm were measured.

(36) The detection results are shown in Table 3.

(37) TABLE-US-00004 TABLE 3 Ex/Em A-b A-j1 A-j2 A-kl A-k2 B-b B-j1 B-j2 I.sub.225/345 147.30 433.90 193.60 163.20 233.80 360.80 354.30 289.80 I.sub.245/410 104.60 112.10 109.80 104.50 107.10 121.50 123.50 128.70 I.sub.245/450 80.64 68.25 77.11 71.43 76.13 94.75 88.15 89.83 I.sub.225/345/I.sub.245/410 1.41 3.87 1.76 1.56 2.18 2.97 2.87 2.25 I.sub.245/450/I.sub.245/410 0.77 0.61 0.70 0.68 0.71 0.78 0.71 0.70 Ex/Em B-k1 B-k2 C-b C-j1 C-j2 D-b D-j D-k I.sub.225/345 306.50 295.50 215.30 328.20 292.40 228.20 375.70 238.70 I.sub.245/410 132.60 125.20 92.75 287.90 134.10 236.90 652.90 269.20 I.sub.245/450 89.13 87.01 74.72 220.50 107.98 175.80 575.91 189.78 I.sub.225/345/I.sub.245/410 2.31 2.36 2.32 1.14 2.18 0.96 0.58 0.89 I.sub.245/450/I.sub.245/410 0.67 0.70 0.81 0.77 0.81 0.74 0.88 0.70 Ex/Em E-b E-j E-k1 E-k2 F-b F-j G-b G-j1 I.sub.225/345 150.30 190.40 100.10 47.78 264.10 859.60 430.40 505.10 I.sub.245/410 200.50 514.50 415.10 319.30 210.40 1248.00 804.10 804.70 I.sub.245/450 161.71 452.41 346.74 249.16 152.90 1034.20 616.51 685.90 I.sub.225/345/I.sub.245/410 0.75 0.37 0.24 0.15 1.26 0.69 0.54 0.63 I.sub.245/450/I.sub.245/410 0.81 0.88 0.84 0.78 0.73 0.83 0.77 0.85 Ex/Em G-j2 G-k H-b H-j1 H-j2 H-k1 H-k2 I-j1 I.sub.225/345 850.10 472.60 384.40 410.60 442.40 407.20 369.10 190.40 I.sub.245/410 1322.00 811.00 757.60 740.00 770.80 733.30 743.10 514.50 I.sub.245/450 1025.20 635.02 595.88 602.07 592.81 599.09 590.67 452.41 I.sub.225/345/I.sub.245/410 0.64 0.58 0.51 0.55 0.57 0.56 0.50 0.37 I.sub.245/450/I.sub.245/410 0.78 0.78 0.79 0.81 0.77 0.82 0.79 0.88 Ex/Em I-j2 J-j1 J-j2 K-b K-j1 K-j2 K-k L-b I.sub.225/345 100.10 2775.00 1290.00 307.40 814.40 96.90 356.70 20.44 I.sub.245/410 415.10 5518.00 1993.00 152.00 1629.00 1054.00 504.80 196.50 I.sub.245/450 346.74 7129.30 2907.70 117.68 2595.60 939.70 449.72 167.51 I.sub.225/345/I.sub.245/410 0.24 0.50 0.65 2.02 0.50 0.09 0.71 0.10 I.sub.245/450/I.sub.245/410 0.84 1.29 1.46 0.77 1.59 0.89 0.89 0.85 Ex/Em L-j L-k1 L-k2 BL JL KL LL I.sub.225/345 2189.00 68.82 18.44 2750.00 5716.00 2711.00 3914.00 I.sub.245/410 2457.00 590.00 194.50 2105.00 3318.00 2708.00 2901.00 I.sub.245/450 3909.60 516.69 154.58 2630.50 3420.40 3090.50 3733.20 I.sub.225/345/I.sub.245/410 0.89 0.12 0.09 1.31 1.72 1.00 1.35 I.sub.245/450/I.sub.245/410 1.59 0.88 0.79 1.25 1.03 1.14 1.29

(38) Results of I.sub.245/410 ratio and I.sub.245/450 ratio of the monitoring well to the background monitoring well for the same landfill are shown in Table 4.

(39) TABLE-US-00005 TABLE 4 Ex/Em A-j1/A-b A-j2/A-b B-j1/B-b B-j2/B-b C-j1/C-b I.sub.245/410 1.07 1.05 1.02 1.06 3.10 I.sub.245/450 0.85 0.96 0.93 0.95 2.95 Ex/Em C-j2/C-b D-j1/D-b E-j/E-b F-j/F-b G-j1/G-b I.sub.245/410 1.45 2.76 2.57 5.93 1.00 I.sub.245/450 1.45 3.28 2.80 6.72 1.11 Ex/Em G-j2/G-b H-j1/H-b H-j2/H-b K-j1/K-b K-j2/K-b I.sub.245/410 1.64 0.98 1.02 10.72 6.93 I.sub.245/450 1.66 1.01 0.99 22.06 7.99 Ex/Em L-j/L-b I.sub.245/410 12.50 I.sub.245/450 23.34

(40) As can be seen from tables 3 and 4, the detection data analysis for fluorescence at specific wavelengths of groundwater samples from eight landfills without leachate pollution (A, B, C, D, E, G, H, and I), groundwater samples from four landfills with leachate pollution (F, J, K and L) and leachate samples from four landfills indicates that for the groundwater from the landfill without leachate pollution, if the ratio of the intensity I.sub.250/410 of the pollution monitoring well to the intensity I.sub.250/410 of the site background monitoring well and the ratio of the intensity I.sub.245/450 of the pollution monitoring well to the intensity I.sub.245/450 of the site background monitoring well are both less than 4; for the groundwater from the landfill with leachate pollution, if the ratio of the intensity I.sub.245/410 of the pollution monitoring well to the intensity I.sub.245/410 of the site background monitoring well and the ratio of the intensity I.sub.245/450 of the pollution monitoring well to the intensity I.sub.245/450 of the site background monitoring well are both greater than 6.8, the groundwater is considered to be polluted; when the ratio of the fluorescence intensity I.sub.240-260/450 of the pollution monitoring well at 240-260 nm/450 nm to the fluorescence intensity I.sub.240-260/450 of the site background monitoring well at 240-260 nm/450 nm is between 4 and 6.8, the magnitude of the ratios of the fluorescence intensity I.sub.215-225/335 at 215-225 nm/335 nm to the intensity I.sub.240-260/410 at 240-260 nm/410 nm of the water samples from the site background monitoring well, the pollution monitoring well or the pollution diffusion monitoring well needs to be further determined, and if the ratios are all greater than 1 or all less than 1, it indicates that the groundwater is not polluted, while if the ratios are not all greater than 1 or not all less than 1, it indicates that the groundwater is polluted; if the ratios of I.sub.245/450/I.sub.245/410 of the groundwater from the pollution monitoring well without leachate pollution are all less than 1, and the ratios of I.sub.245/450/I.sub.245/410 of the groundwater samples and the leachate samples from the pollution monitoring well of the landfill with leachate pollution are all greater than 1, it also indicates that the groundwater has been polluted.

Embodiment Three

(41) The same as Embodiment one except for step (2) as follows.

(42) The Ex/Em wavelengths of the samples were selected within ranges of 215-225 nm/335-345 nm, 240-260 nm/410 nm and 240-260 nm/450 nm, and intensities I.sub.225/335 at Ex/Em=225 nm/335 nm, I.sub.255/410 at Ex/Em=255 nm/410 nm, and I.sub.255/450 at Ex/Em=255 nm/450 nm were measured.

(43) The detection results are shown in Table 5.

(44) TABLE-US-00006 TABLE 5 Ex/Em A-b A-j1 A -j2 A-k1 A-k2 B-b B-j1 B-j2 I.sub.225/335 142.70 409.00 204.00 208.10 258.90 355.20 380.60 338.50 I.sub.255/410 107.90 113.90 97.46 92.68 110.50 107.30 106.90 108.70 I.sub.255/450 83.85 82.45 81.26 81.43 79.57 88.23 86.34 90.71 I.sub.225/335/I.sub.255/410 1.32 3.59 2.09 2.25 2.34 3.31 3.56 3.11 I.sub.255/450/I.sub.255/410 0.78 0.72 0.83 0.88 0.72 0.82 0.81 0.83 Ex/Em B-k1 B-k2 C-b C-j1 C-j2 D-b D-j D-k I.sub.225/335 314.80 329.50 237.30 330.40 325.10 228.10 376.80 231.10 I.sub.255/410 117.60 103.30 90.45 285.20 140.30 231.80 642.10 237.20 I.sub.255/450 93.82 90.91 83.93 237.20 109.00 182.60 604.60 197.80 I.sub.225/335/I.sub.255/410 2.68 3.19 2.62 1.16 2.32 0.98 0.59 0.97 I.sub.255/450/I.sub.255/410 0.80 0.88 0.93 0.83 0.78 0.79 0.94 0.83 Ex/Em E-b E-j E-k1 E-k2 F-b F-j G-b G-j1 I.sub.225/335 152.80 173.40 94.65 47.24 249.1 762.5 359.30 473.90 I.sub.255/410 194.20 526.30 400.70 291.50 188.7 1207 779.20 795.60 I.sub.255/450 160.70 498.60 367.20 268.30 164.5 1106 654.30 753.80 I.sub.225/335/I.sub.255/410 0.79 0.33 0.24 0.16 1.32 0.63 0.46 0.60 I.sub.255/450/I.sub.255/410 0.83 0.95 0.92 0.92 0.87 0.92 0.84 0.95 Ex/Em G-j2 G-k H-b H-j1 H-j2 H-k1 H-k2 I-j1 I.sub.225/335 801.90 366.40 344.30 408.10 388.30 360.90 355.60 173.40 I.sub.255/410 1308.00 815.40 709.40 747.00 722.90 738.60 729.30 526.30 I.sub.255/450 1088.00 672.70 633.40 650.10 623.50 652.60 624.10 498.60 I.sub.225/335/I.sub.255/410 0.61 0.45 0.49 0.55 0.54 0.49 0.49 0.33 I.sub.255/450/I.sub.255/410 0.83 0.82 0.89 0.87 0.86 0.88 0.86 0.95 Ex/Em I-j2 J-j1 J-j2 K-b K-j1 K-j2 K-k L-b I.sub.225/335 94.65 2470.00 1084.00 338.70 758.90 92.38 344.80 24.71 I.sub.255/410 400.70 4559.00 1593.00 150.00 1309.00 1190.00 505.50 192.70 I.sub.255/450 367.20 7161.00 2921.00 122.20 2661.00 1073.00 492.90 174.70 I.sub.225/335/I.sub.255/410 0.24 0.54 0.68 2.26 0.58 0.08 0.68 0.13 I.sub.255/450/I.sub.255/410 0.92 1.57 1.83 0.81 2.03 0.90 0.98 0.91 Ex/Em L-j L-k1 L-k2 BL JL KL LL I.sub.225/335 1974.00 53.80 7.60 2655.00 5577.00 2612.00 3674.00 I.sub.255/410 1923.00 601.20 194.90 1730.00 2788.00 2250.00 2507.00 I.sub.255/450 3954.00 533.80 181.70 2609.00 3313.00 3022.00 3655.00 I.sub.225/335/I.sub.255/410 1.03 0.09 0.04 1.53 2.00 1.16 1.47 I.sub.255/450/I.sub.255/410 2.06 0.89 0.93 1.51 1.19 1.34 1.46

(45) Results of I.sub.255/410 ratio or I.sub.255/450 ratio of the monitoring well to the background monitoring well for the same landfill are shown in Table 6.

(46) TABLE-US-00007 TABLE 6 Ex/Em A-j1/A-b A-j2/A-b B-j1/B-b B-j2/B-b C-j1/C-b I.sub.255/410 1.06 0.90 1.00 1.01 3.15 I.sub.255/450 0.98 0.97 0.98 1.03 2.83 Ex/Em C-j2/C-b D-j1/D-b E-j/E-b F-j/F-b G-j1/G-b I.sub.255/410 1.55 2.77 2.71 6.40 1.02 I.sub.255/450 1.30 3.31 3.10 6.72 1.15 Ex/Em G-j2/G-b H-j1/H-b H-j2/H-b K-j1/K-b K-j2/K-b I.sub.255/410 1.68 0.98 1.02 8.73 7.93 I.sub.255/450 1.66 1.01 0.99 21.78 8.78 Ex/Em L-j/L-b I.sub.255/410 9.98 I.sub.255/450 22.63

(47) As can be seen from tables 5 and 6, the detection data analysis for fluorescence of specific wavelengths of groundwater samples from nine landfills without leachate pollution (A to I), groundwater samples from three landfills with leachate pollution (J to L) and leachate samples from four landfills indicates that for the groundwater from the landfill without leachate pollution, if the ratio of the intensity I.sub.255/410 of the pollution monitoring well to the intensity I.sub.225/410 of the site background monitoring well and the ratio of the intensity I.sub.255/450 of the pollution monitoring well to the intensity I.sub.255/450 of the site background monitoring well are both less than 4; for the groundwater from the landfill with leachate pollution, if the ratio of the intensity I.sub.225/410 of the pollution monitoring well to the intensity I.sub.225/410 of the site background monitoring well and the ratio of the intensity I.sub.255/450 of the pollution monitoring well to the intensity I.sub.255/450 of the site background monitoring well are both greater than 6.8, the groundwater is considered to be polluted; when the ratio of the fluorescence intensity I.sub.240-260/450 of the pollution monitoring well at 240-260 nm/450 nm to the fluorescence intensity I.sub.240-260/450 of the site background monitoring well at 240-260 nm/450 nm is between 4 and 6.8, the magnitude of the ratios of the fluorescence intensity I.sub.215-225/335 at 215-225 nm/335 nm to the intensity I.sub.240-260/410 at 240-260 nm/410 nm of the water samples from the site background monitoring well, the pollution monitoring well or the pollution diffusion monitoring well needs to be further determined, and if the ratios are all greater than 1 or all less than 1, it indicates that the groundwater is not polluted, while if the ratios are not all greater than 1 or not all less than 1, it indicates that the groundwater is polluted; if the ratios of I.sub.255/450/1255/410 of the groundwater from the pollution monitoring well without leachate pollution are all less than 1, and the ratios of I.sub.255/450/1255/410 of the groundwater samples and the leachate samples from the pollution monitoring well of the landfill with leachate pollution are all greater than 1, it also indicates that the groundwater has been polluted.

(48) As can be seen from tables 1 to 6, in the rapid detection method provided by the present invention, the fluorescence within the range of 240-260 nm/450 nm, 215-225 nm/335-345 nm and 240-260 nm/410 nm is detected, and whether the groundwater is polluted by the landfill leachate according to the ratio of fluorescence intensities.

Comparative Example One

(49) The same as Embodiment one except that this comparative example determined whether the groundwater is polluted using fluorescence parameters of organic matters, contents of organic matters and UV parameters which have been reported at home and abroad.

(50) These parameters includes the following: (1) five fluorescent components (specifically see FIG. 4) and relative contents thereof (C1, C2, C3, C4 and C5) obtained from Parallel Factor Analysis on the three-dimensional fluorescence spectra of 43 samples (not including leachate samples) provided by Embodiment one; (2) a ratio HIX of a fluorescence integral area within a band range of 435 nm to 480 nm in the emission spectrum to a fluorescence integral area within a band range of 300 nm to 345 nm under the sample excitation wavelength of 245 nm; (3) a ratio β:α of a maximum fluorescence intensity I.sub.3 at the excitation wavelength of 310 nm within the emission wavelength range of 420 nm to 435 nm to a fluorescence intensity a at the excitation wavelength of 310 nm and the emission wavelength of 380 nm; (4) a ratio BIX of a fluorescence intensity at the excitation wavelength of 310 nm and the emission wavelength of 380 nm to a fluorescence intensity at the excitation wavelength of 310 nm and the emission wavelength of 430 nm; (5) contents of organic matters (DOC); and (6) absorbance a(355) of organic matters at 355 nm.

(51) The detection results are shown in Table 7.

(52) TABLE-US-00008 TABLE 7 C1 C2 C3 C4 C5 HIX β:α BIX DOC a(355) .sub. A-b 71.74 39.24 61.09 36.14 90.67 1.83 1.02 1.08 2.09 0.17 .sub. A-j1 63.62 28.03 221.82 6.92 295.19 0.73 1.07 1.17 1.85 0.07 .sub. A-j2 69.46 30.94 82.77 37.81 130.99 1.23 1.15 1.28 1.84 0.06 .sub. A-k1 65.97 32.36 76.95 36.49 114.15 1.48 1.08 1.25 1.71 0.19 .sub. A-k2 65.46 32.58 117.15 29.40 163.75 1.19 1.13 1.16 1.53 0.08 .sub. B-b 69.38 44.32 199.47 37.79 138.80 0.84 0.79 0.88 2.30 0.60 .sub. B-j1 69.29 44.43 193.15 32.42 136.34 0.87 1.07 1.15 2.41 0.49 .sub. B-j2 72.56 46.28 167.08 36.81 121.05 1.06 1.05 1.09 3.08 0.24 .sub. B-k1 74.02 47.54 172.55 40.68 119.85 0.99 1.08 1.17 2.88 0.54 .sub. B-k2 75.53 43.34 175.30 36.20 121.81 0.94 1.10 1.20 2.22 0.92 .sub. C-b 54.64 48.08 86.39 25.78 135.62 1.20 0.94 1.00 1.97 0.91 .sub. C-j1 183.32 145.44 132.83 80.33 256.11 2.41 0.92 0.95 2.88 5.20 .sub. C-j2 82.19 63.37 106.87 35.42 181.84 1.38 0.98 1.02 2.84 1.13 .sub. D-b 183.84 96.43 208.61 71.92 68.45 1.67 1.11 1.26 0.18 1.67 .sub. D-j 455.10 406.85 181.68 180.41 392.65 4.25 0.81 0.85 4.54 5.20 .sub. D-k 192.38 103.22 198.75 79.88 77.91 1.81 1.06 1.19 2.65 1.31 .sub. E-b 148.82 87.74 69.50 70.94 106.34 2.82 0.98 1.06 1.99 0.39 .sub. E-j 363.42 336.95 90.38 132.31 208.98 5.68 0.79 0.83 2.78 3.65 .sub. E-k1 309.35 238.35 130.84 105.72 21.16 4.50 0.85 0.92 2.64 2.11 .sub. E-k2 221.15 168.95 100.62 82.01 0.00 5.19 1.15 0.90 3.25 3.91 .sub. F-b 145.64 91.24 189.55 60.15 113.67 1.73 0.99 1.12 5.14 17.16 .sub. F-j 1024.70 910.93 690.95 38.94 476.86 3.56 0.82 0.86 3.16 1.73 G-b 628.17 355.26 304.22 243.12 327.81 3.39 1.03 1.12 4.98 2.16 G-j1 595.00 691.76 451.66 0.00 343.43 3.43 0.84 0.84 5.90 7.72 G-j2 1054.57 629.55 568.15 363.63 483.07 3.60 0.97 1.05 6.08 3.71 G-k 676.39 370.21 309.88 234.13 344.94 3.50 1.07 1.20 5.13 2.32 H-b 564.47 373.57 304.49 219.23 279.43 3.63 0.96 1.04 5.47 4.27 H-j1 572.66 382.19 298.86 213.32 338.35 3.58 0.95 1.01 5.17 4.13 H-j2 566.19 374.72 299.83 212.59 339.85 1.23 0.93 1.00 5.02 4.11 H-k1 567.46 376.72 307.12 208.90 305.51 3.54 0.94 1.03 5.33 4.38 H-k2 564.87 375.63 314.49 199.96 273.01 0.73 0.94 1.01 5.58 4.26  I-j1 184.67 151.19 113.16 102.31 204.32 3.28 0.89 0.94 2.25 2.55  I-j2 56.18 73.49 94.98 357.43 170.47 5.57 0.83 0.90 2.26 1.08  J-j1 3660.10 2392.66 3887.60 4457.70 0.00 4.73 1.01 1.04 11.07 14.77  J-j2 1046.44 717.80 721.69 2252.23 870.87 6.76 0.94 0.96 4.68 2.80 K-b 110.20 71.48 206.45 31.77 138.70 1.14 1.05 1.22 2.06 1.11 K-j1 649.68 542.04 585.51 2185.42 230.18 8.43 0.89 0.94 4.43 2.84 K-j2 897.32 781.00 527.18 19.61 0.00 4.22 0.83 0.87 9.77 13.42 K-k 333.30 244.93 200.09 220.86 160.32 3.97 0.92 0.97 4.20 1.87 L-b 145.22 107.51 77.80 51.67 0.00 3.67 0.93 0.97 2.19 0.68 L-j 754.77 560.55 1754.77 3727.47 163.96 3.07 0.92 0.98 3.31 0.70 L-k1 437.36 350.85 170.86 144.67 0.00 5.65 0.83 0.90 2.48 1.40 L-k2 143.40 106.63 63.14 50.84 0.00 4.12 0.89 0.94 2.15 1.33

(53) Table 7 illustrates values of ten parameters of 43 groundwater samples. The principal component analysis was carried out by means of the Statistical Package for the Social Sciences (SPSS) software, and Table 8 and Table 9 were obtained. The 10 sets of spectra and concentration parameters can be classified into three categories, that is, principal components PC1, PC2 and PC3.

(54) TABLE-US-00009 TABLE 8 Parameter PC1 PC2 PC3 C3 0.953 0.136 C1 0.914 0.149 0.312 C2 0.881 0.254 0.330 C4 0.880 BIX −0.939 −0.141 β:α −0.924 HIX 0.389 0.695 a(355) 0.313 0.174 0.839 DOC 0.531 0.206 0.729 C5 0.429 0.396 −0.526

(55) As can be seen from Table 8, C1, C2, C3 and C4 have higher scores on PC1, and in combination with the three-dimensional fluorescence spectrums in FIG. 4, it can be seen that components C1, C2 and C4 are humic-like substances. Therefore, the first classification PC1 represents the content of humic-like substances in the groundwater. The absolute values of parameters HIX, BIX and β:α have higher scores on PC2. PC2 represents the humification level of organic matters in the groundwater, since HIX represents humification and BIX and β:α are opposite to humification with negative scores on PC2, DOC and a(355) have higher scores on PC3, and both parameters are related to the total content of organic matters, that is, PC3 represents the total content of organic matters in the groundwater.

(56) TABLE-US-00010 Table 9 Sample PC1 PC2 PC3 .sub. A-b −0.520708 −0.537181 −0.359909 .sub. A-j1 −0.20649 −1.10124 −0.77453 .sub. A-j2 −0.15806 −1.77868 −0.5881 .sub. A-k1 −0.28084 −1.37279 −0.54716 .sub. A-k2 −0.2665 −1.29983 −0.6404 .sub. B-b −0.92169 0.897594 −0.14585 .sub. B-j1 −0.33531 −1.09683 −0.33779 .sub. B-j2 −0.42015 −0.79759 −0.19276 .sub. B-k1 −0.31309 −1.19007 −0.23008 .sub. B-k2 −0.27483 −1.37478 −0.32434 .sub. C-b −0.68678 −0.02378 −0.2634 .sub. C-j1 −0.57889 0.457296 0.255496 .sub. C-j2 −0.54973 −0.20002 −0.17658 .sub. D-b −0.16094 −1.55168 −0.59193 .sub. D-j −0.35664 1.534633 0.33964 .sub. D-k −0.24515 −1.09247 −0.14453 .sub. E-b −0.4848 −0.16849 −0.40893 .sub. E-j −0.59792 1.802704 0.037482 .sub. E-k1 −0.64173 0.990281 0.112965 .sub. E-k2 −0.42421 −0.03155 0.388512 .sub. F-b −0.69006 −0.5118 2.490542 .sub. F-j 0.403848 1.285538 −0.44553 G-b 0.263817 −0.42988 −0.03737 G-j1 −0.17206 1.277288 1.113753 G-j2 0.669454 0.081633 0.168438 G-k 0.427297 −0.82844 −0.0643 H-b 0.017518 0.134528 0.470635 H-j1 0.021513 0.296284 0.31711 H-j2 −0.08512 0.066255 0.430458 H-k1 −0.00165 0.248055 0.432107 H-k2 −0.12258 −0.11459 0.693741  I-j1 −0.58858 0.699386 −0.17747  I-j2 −0.64713 1.375604 −0.47716  J-j1 4.70689 −1.05004 2.679699  J-j2 1.588016 1.007261 −1.33788 K-b −0.26147 −1.20885 −0.3619 K-j1 0.775845 1.223841 −0.39026 K-j2 −0.2628 1.141529 3.175629 K-k −0.33302 0.529429 0.106144 L-b −0.68073 0.393431 −0.1412 L-j 1.685438 −0.13538 −0.89109 L-k1 2.474007 1.732408 −3.10196 L-k2 −0.76399 0.720979 −0.05995

(57) As can be seen from Table 9, for the polluted groundwater and unpolluted groundwater, in PC1, the only difference between them is that the scores are positive or negative, and there is no significant difference between polluted groundwater samples F-j, J-j1, J-j2, K-j1 and L-j and unpolluted groundwater samples in PC1, that is, whether the groundwater is polluted cannot be determined according to humic content parameters C1, C2, C3 and C4; for PC2, polluted groundwater samples F-j, J-j1, J-j2, K-j1, L-j cannot be distinguished from other unpolluted groundwater samples, that is, whether the groundwater is polluted cannot be determined according to humification parameters HIX, BIX and β:α; for PC3, the polluted groundwater samples F-j, J-j1, J-j2, K-j1 and L-j cannot be distinguished from other unpolluted groundwater samples through numerical scores, that is, whether the groundwater is polluted cannot be determine according to the organic matter content parameters DOC and a(355).

(58) Therefore, whether the groundwater is polluted by the leachate cannot be determined according to the above ten indexes.

(59) It can be seen from comparison between the embodiments and comparative examples that only the detection method provided by the present invention can achieve the rapid detection for the condition of landfill leachate polluting groundwater.

(60) The applicant has stated that although the compound, the rapid detection method for a condition of landfill leachate polluting groundwater and the application thereof provided by the present invention are described through the embodiments described above, the present invention is not limited to the processes and steps described above, which means that implementation of the present invention does not necessarily depend on the processes and steps described above. It should be apparent to those skilled in the art that any improvements made to the present invention, equivalent replacements of raw materials selected in the present invention and addition of adjuvant ingredients thereof, and selections of specific methods, etc., all fall within the protection scope and the disclosed scope of the present invention.