An anionic flocculant including: galactomannan; and a polysaccharide other than the galactomannan, wherein the anionic flocculant has a bulk density of 0.50 g/cm.sup.3 or more but 1.00 g/cm.sup.3 or less, the anionic flocculant has a particle diameter D.sub.50 of 250 μm or more but 850 μm or less, and the anionic flocculant has a particle diameter D.sub.10 of 150 μm or more.

An anti-biofouling shape-memory composite aerogel includes a unidirectional chitosan aerogel channel, a plant polyphenol coating, and a polyphenol/iron ion chelate. The plant polyphenol coating is evenly distributed on an inner wall of the unidirectional chitosan aerogel channel, and the polyphenol/iron ion chelate is located at a top end of the unidirectional chitosan aerogel channel. The anti-biofouling chitosan-based composite aerogel has an evaporation rate of 1.96 kg.Math.m.sup.−2.Math.h.sup.−1 at an illumination intensity of 1 kW/m.sup.2. The composite aerogel has shape-memory properties, and can quickly restore its original shape in water after extrusion, thereby accelerating the diffusion of substances to complete the modification of inner channels. In this way, desirable anti-biofouling ability is achieved, and excellent structural stability as well as continuous and efficient photothermal water evaporation are guaranteed in a complex water environment.

A method for the treatment of silicon-containing wastewater from the preparation of a molecular sieve or a catalyst includes the step of contacting the silicon-containing wastewater with at least one acid or at least one alkali, so that at least a part of the silicon elements in the silicon-containing wastewater form a colloid. A mixture containing a colloid is thus obtained. A silicon-containing solid phase and a first liquid phase are produced by a solid-liquid separation. A solid phase and a second liquid phase are produced by a solid-liquid separation after at least a part of the metal elements in the first liquid phase form a precipitate. At least a part of the second liquid phase is subjected to electrodialysis to produce an acid liquor and/or an alkali liquor. The silicon-containing solid phase can be used as the raw material for a molecular sieve synthesis.

A hanging compartmental accessory organizer that typically includes a hanging mechanism such as a hook, an optional support bar that is in communication with the hanging mechanism, a flexible back panel that is hanging from and supported by the hook and if present the support bar, at least one compartment member; wherein, the back panel comprises attachment strips, and the at least one compartment member comprising corresponding attachment means, such that the compartment member is removably attachable at multiple points on the back panel

Disclosed are an aluminum-based lithium ion-sieve (LIS), and a preparation method and use thereof. The aluminum-based LIS is Li.sub.2SO.sub.4.Math.2Al(OH).sub.3.Math.nH.sub.2O coated with Al(OH).sub.3, where n is 1 to 4. The preparation method includes: reacting an aluminum salt and a lithium salt with an alkali to obtain an adsorbent intermediate LiOH.Math.2Al(OH).sub.3.Math.nH.sub.2O; using a dilute sulfuric acid to obtain an aluminum-based lithium adsorbent Li.sub.2SO.sub.4.Math.2Al(OH).sub.3.Math.nH.sub.2O; and filtering out and washing the adsorbent, mixing the adsorbent with a metaaluminate, and adjusting a pH to obtain the Li.sub.2SO.sub.4.Math.2Al(OH).sub.3.Math.nH.sub.2O coated with Al(OH).sub.3. The aluminum-based LIS of the present disclosure has the advantages of high adsorption capacity and prominent stability, and can be used to efficiently recover low-concentration lithium in industrial wastewater. Moreover, the LIS is coated with aluminum hydroxide, which can effectively protect the structure from being corroded.

The present disclosure provides an in-situ method for removing sulfates. The method comprises delivering at least one low molecular weight organic compound (LMWOC) to soil or groundwater to attain a concentration of the LMWOC of 750-3000 mg/L, such as 1000-2000 mg/L, or about 1500 mg/L, especially whereby sulfate is reduced to below 250 mg/L in the soil or groundwater. The method may further comprise contacting the soil or groundwater with an oxidizer, such as hydrogen peroxide, whereby the concentration of metals or metalloids is reduced in the soil or groundwater.

Provided are sequestering agents for sequestering non-water moieties from an aqueous solution. The sequestering agents may comprise a detergent; and a polymer operable to stabilize formation of a detergent micelle thereby causing the detergent and polymer to self-assemble into a nanonet upon exposure to the aqueous solution. Also provided are kits therefore and methods for use of the sequestering agents and kits.

This invention provides processes for treating a mixture of produced water and blowdown water comprising introducing produced water (PW) into blowdown water (BD) for forming a PW-BD water mixture, softening the PW-BD water mixture, subjecting the PW-BD water mixture to activated carbon filtration and reverse osmosis membrane desalination. The process generates a product water and a brine by-product.

The disclosure discloses a method for preparing cuprous chloride by high-value utilization of chloride ion-containing wastewater, belonging to the field of wastewater treatment. According to the disclosure, wastewater containing chloride ions is taken, and the pH is maintained at 2 to 3.5. Cuprous oxide is added by 50 to 80% of a theoretical amount of the cuprous oxide according to a Cl.sup.− concentration for reaction 8 to 15 min. Centrifugation is performed to obtain crude cuprous chloride and supernatant. Cuprous oxide is added to the resulting supernatant for reaction 8 to 15 min, and a total of cuprous oxide added in two reactions accounts for 90 to 100% of the theoretical amount. Centrifugation is performed after the reaction to obtain crude cuprous chloride. According to the method of the disclosure, the amount of cuprous oxide used is greatly reduced, and the purity of the cuprous chloride is improved.

The disclosure discloses a method for high-value application of PTA residue high-concentration bromine-containing wastewater to preparation of cuprous bromide, belongs to the field of PTA residue treatment, and includes: firstly adjusting a pH value of the bromine-containing wastewater to 0.5-2, adding cuprous oxide in batches, taking a reaction for 3-20 min after the cuprous oxide is totally added to produce cuprous bromide, Solid liquid separation to obtain cuprous bromide, concentrating a liquid phase to recover inorganic salt while rest wastewater may be used as process water for application. By cuprous oxide addition and method regulation and control, a bromine removal rate is as high as 95% or higher, the cuprous bromide reaches yield of 90% or higher and purity of 95%. Meanwhile, sodium sulfate with the purity of 90% or higher may be obtained. High-value application of the PTA residue high-concentration bromine-containing wastewater is really realized.