Providing a method for improving saline-alkaline soil by using a biomass rapid pyrolysis product, comprising: rapidly pyrolyzing agricultural and forest residues to prepare bio-oil and semi-coke; deodorizing, dephenolizing and tackifying the bio-oil to prepare a modified bio-oil, and supplementing the modified bio-oil with the nutrient elements to produce a rapid ameliorant for saline-alkali soil; loading microbial fertilizer on the semi-coke to prepare a continuous renovation ameliorant for saline-alkali soil; (4) applying the ameliorants on the surface of saline-alkali soil. The method can not only enhance the aggregated and granulated structure of the saline-alkali soil and eliminate the salt carried by the capillary water, but also convert the mineral resource-based calcium, magnesium and ferrite salts which are insoluble and hardly absorbed into the humic acid calcium, magnesium and ferrite salts which can be easily absorbed, thereby activate calcium, magnesium and iron elements, strengthen soil fertility, rapidly renovate soil and restore the plantation function.

An in-situ thermal desorption system, an in-situ thermal desorption-oxidation remediation system and a remediation method are provided, wherein the in-situ thermal desorption system comprises a heating device and an extraction device, wherein the heating device is used for transporting heated air to the contaminated soil to desorb the organic pollutants, and wherein the extraction device is used for sucking the desorbed organic pollutants. The in-situ thermal desorption-oxidation remediation system adds a thermal catalytic oxidation device based on the in-situ thermal desorption system, wherein the organic pollutants extracted by the extraction device are catalytically degraded in the thermal catalytic oxidation device, and a device for recycling and reprocessing an exhaust gas is further added. The present disclosure also provides an in-situ thermal desorption-oxidation remediation method. The heating method of the present disclosure is novel, which reduces the cost of thermal desorption, strengthens the heating area, improves the heating efficiency, further enhances the thermal catalytic oxidation efficiency, and achieves the reuse and recycle of the exhaust gas. Thus, no secondary exhaust gas is produced.

A rock sample includes multiple rock samples that are each obtained from the borehole. The rock samples have been exposed to contamination during a drilling operation to drill the borehole. The rock sample is split into a first sample portion and a second sample portion. The first sample portion is decontaminated with a solvent. The second sample portion is decontaminated by thermovaporization for an initial duration of time at an initial thermovaporization temperature below that of a cracking temperature of an organic matter carried within the rock sample. A difference between a first pyrolysis Tmax value of the first sample portion decontaminated by the solvent and a second pyrolysis Tmax value of the second sample portion decontaminated by the thermovaporization is determined to satisfy a decontamination level threshold. The remainder of rock samples are decontaminated by the thermovaporization in response to determining that the difference satisfies the decontamination level threshold.

The invention relates to a pyrolysis plant and a process for recovering (recycling) carbon fibers from carbon fiber-containing plastics, in particular from carbon fiber-reinforced plastics (CFPs or CFP materials), preferably from carbon fiber-containing and/or carbon fiber-reinforced composites (composite materials).

A method and apparatus for extracting bitumen and other hydrocarbons from oil-wetted tar sands and converting it to useful petroleum products, the method comprising first mixing the tar sands material with a condensate consisting oil material and agitating the resulting slurry. After agitating the slurry it is passed through a dual-phase centrifuge and the bitumen and heavy end hydrocarbons are removed, while the light end hydrocarbons remain in the centrifuge cake. The centrifuge cake is heated as it passes through an indirect fired rotary thermal desorber and the hydrocarbon material evaporates are cooled in a quench tank to be collected in the quench supply and recovery tank. The process can also be applied to materials which have become contaminated by hydrocarbons, to extract and remove the hydrocarbons. Another embodiment of the process involves using the indirect fired rotary thermal desorber to treat either tar sands material or a centrifuge cake and quenching the hydrocarbon material evaporates within the quench tank to be collected in the quench supply and recovery tank.

A heating device for heating underground soil including a conductor housed in a conductive casing, where when at least one driving current is supplied to the conductor, the conductor generates at least one magnetic field that induces at least one induced current in the casing. The driving currents are of a frequency sufficient to cause the induced currents to generate resistance in the casing, thereby increasing the temperature of the casing. A plurality of the heating devices may be arranged in an array to facilitate the heating of a zone of soil.

Contaminant-containing soil can be remediated by subjecting the soil to microwave irradiation to heat the soil to a combustion temperature of from 150 C. to 1200 C. to initiate combustion. A target amount of the contaminant in the soil is destroyed. An oxidizer gas can be flowed through the soil using a gas blower and at least one gas injection line and controlled at a rate such that a self-sustaining smoldering combustion front is formed that moves through the soil. A microwave absorber additive can be added to the soil to accelerate the heating of the soil. At least one waveguide connected to a source of microwave energy directs microwaves into the soil.

A system for the destruction of PFAS compounds through mineralization with reactive oxides is disclosed herein. The system includes an acquisition unit for obtaining reactive oxides. The system also includes a mixing unit operatively connected to the acquisition unit, where the mixing unit is configured to combine PFAS-contaminated waste with the reactive oxides. The system also includes a high-temperature treatment unit operatively connected to the mixing unit to subject the mixture of PFAS-contaminated waste and reactive oxides to a chemical reaction. The system includes a cooling unit operatively connected to the high-temperature treatment unit. The system includes a waste collection receptacle connected to the cooling unit. The system includes particulate vapor treatment systems, where PFAS-contaminated atmospheres from the high-temperature treatment unit and the cooling unit are captured to prevent emissions to the environment.

A system and method for controlled verified remediation of excavated contaminated spoil using a sorbent in a verified process of testing and analysis of spoil before and after remediation and of adjusting amounts of sorbent and supplemental water mixed with contaminated spoil.

A heating device for heating underground soil comprising a work-coil housed in a conductive casing, wherein when at least one driving current is supplied to the work-coil, whereby the work-coil generates at least one magnetic field that induces at least one induced current in the casing. The driving currents are of a frequency sufficiently high to cause the induced currents to generate resistance in the casing, thereby increasing the temperature of the casing. A plurality of the heating devices may be arranged in an array to facilitate the heating of a zone of soil.