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Novel soil purifying agent and application thereof to polybrominated diphenyl ethers (PBDEs) contaminated soil restoration

A soil purifying agent and polybrominated diphenyl ether technology, which is applied in the restoration of polluted soil and other directions, can solve the problems of low bioavailability and difficult treatment of PBDEs-contaminated soil, and achieve improved bioavailability, abundant raw materials, and convenient synthesis. Effect

Inactive Publication Date: 2014-03-12
福建沃土环保集团有限公司
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AI Technical Summary

Problems solved by technology

[0006] As strongly hydrophobic organic compounds (HOCs), PBDEs are easily adsorbed by soil and have low bioavailability, which makes the treatment of PBDEs-contaminated soil very difficult.

Method used

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Examples

Experimental program
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Embodiment Construction

[0027] The present invention will be further described below in conjunction with specific examples.

[0028] Novel soil cleaning agent is a metal complex of surfactant and iron group compound. The preparation method is: prepare the mixed aqueous solution of anionic surfactant and iron group compound, and the mol ratio of surfactant and iron group compound is 1: 3~1:5, the volume of water is 200mL, the total concentration of surfactant and iron group compound is 8000~10000mg / L, reflux at about 70℃ for 2 hours, adjust the pH of the mixed aqueous solution to 5~6 with NaOH during reflux, After the reaction solution was cooled, it was suction-filtered, washed repeatedly with an appropriate amount of absolute ethanol, and dried to obtain metal complex powder.

[0029] The surfactant is an anionic surfactant that is environmentally friendly, cheap and readily available, such as fatty alcohol polyoxyethylene ether sulfuric acid, disodium fatty alcohol polyoxyethylene ether sulfosucci...

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PUM

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Abstract

The invention discloses a novel soil purifying agent and application thereof to polybrominated diphenyl ethers (PBDEs) contaminated soil restoration. As PBDEs has a strong hydrophobicity and is easy to adsorb intensively by soil, and very low in bio-availability, the treatment of the PBDEs contaminated soil is very difficult. To solve the problem, an anionic surfactant and iron group compound which are environment-friendly, cheap and easy to get are utilized to form a metal complex, namely the soil purifying agent, according to the molar ratio of (1:3)-(1:5); after being uniformly mixed with the soil, the soil purifying agent is added with humic acid, and soaked by water, then the soil purifying agent can be used for efficiently and rapidly purifying contaminated soil while the soil property is not changed and the bio-availability is improved. The novel soil purifying agent is suitable for PBDEs contaminated soil restoration, and has an excellent application prospect on the aspect of large-scale engineering application.

Description

technical field [0001] The invention belongs to the technical field of treatment of halogenated aromatic hydrocarbon organic pollutants for environmental protection, and relates to a novel soil purifying agent and the application of the soil purifying agent in remediation of polybrominated diphenyl ether-contaminated soil. Background technique [0002] Polybrominated diphenyl ethers (PBDEs) are widely used brominated flame retardants, which are used in many fields such as electronic products, textiles, construction materials and vehicles. However, as an additive flame retardant, PBDEs are physically bound to the product, and due to the lack of chemical bond binding, they are easily released into the environment during production, use, and disposal. PDBEs have been detected in various environmental media and organisms, and their distribution range is almost all over the world. Some brominated PBDEs can even be detected in the Arctic region, and their concentrations in the env...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08
Inventor 解清杰叶丹沈彬
Owner 福建沃土环保集团有限公司
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