A kind of arsenic-containing and halogenated hydrocarbon acid composite polluted soil remediation agent and method

A compound pollution and soil remediation technology, applied in the restoration of polluted soil, biochemical equipment and methods, methods based on microorganisms, etc., to achieve the effect of efficient oxidation and decomposition

Active Publication Date: 2021-11-02
长沙工研院环保有限公司
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the defects of prior art methods for remediating acidic compound polluted soil with arsenic and halogenated hydrocarbons, the first object of the present invention is to provide a remediation agent for acidic compound polluted soil containing arsenic and halogenated hydrocarbons, which mainly uses The principle of "oxidative stability + microbial degradation" is used to remediate the acidic compound contaminated soil of arsenic and halogenated hydrocarbons. Ferrate can be used to oxidize and decompose halogenated hydrocarbons, and oxidize and stabilize arsenic. Microorganisms including Bacillus and Bacillus to degrade organic halogenated hydrocarbons, the surfactants produced by Pseudomonas and Acinetobacter can enhance the ability of Bacillus to degrade halogenated hydrocarbons, while Bacillus The produced hydrocarbon-degrading enzymes can degrade incomplete oxidation products and halogenated hydrocarbon pollutants, and can adsorb and enrich heavy metal arsenic, and the synergistic effect of chemical oxidation and biodegradation can not only repair the composite polluted soil containing arsenic and halogenated hydrocarbons, but also Cooperate with each other and complement each other, reduce the amount of oxidant added, improve the restoration efficiency, the halogenated hydrocarbon content after restoration is lower than the screening value standard of "Soil Environmental Quality Construction Land Soil Pollution Risk Control Standard (Trial)" (GB36600-2018), and the arsenic in the soil The concentration of acid leaching is lower than the Class IV standard in the "Groundwater Quality Standard" (GB / T14848-2017) (that is, less than 0.05mg / L)

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The soil of the arsenic and halogenated hydrocarbon complex polluted plot was excavated, and the concentration of arsenic acid leaching in the soil was 1.05mg / L, and the content of dichloromethane in the soil was 1312mg / kg. First crush and sieve the acidic composite contaminated soil of arsenic and halogenated hydrocarbons to a particle size ≤ 1cm; add the oxidant in 3 batches according to the molar ratio of 1.5:1 (oxidant: halogenated hydrocarbon), sprinkle water and stir for 30 minutes to obtain a mixture, and ventilate Curing for 2 days; spreading 30L of microbial solution A and 50L of microbial solution B per ton of contaminated soil, then plowing the soil 3 times, and curing for 5 days. Determination of halogenated hydrocarbon content and acid leaching concentration of arsenic in soil. The dichloromethane content in the soil after remediation was 18 mg / kg, which was lower than the screening value standard (i.e. lower than 94 mg / kg) for Class I land use in the "Soil...

Embodiment 2

[0039] The soil of the arsenic and halogenated hydrocarbon complex polluted plot was excavated, and the concentration of arsenic acid leaching in the soil was 1.05mg / L, and the content of dichloromethane in the soil was 1312mg / kg. First crush and sieve the acidic composite contaminated soil of arsenic and halogenated hydrocarbons to a particle size ≤ 1cm; add the oxidant in 5 batches according to the molar ratio of 2:1 (oxidant: halogenated hydrocarbon), sprinkle water and stir for 60 minutes to obtain a mixture, and ventilate Curing for 2 days; spread 20L of microbial solution A and 40L of microbial solution B per ton of contaminated soil, then plow the soil 3 times, and maintain for 3 days. Determination of halogenated hydrocarbon content and acid leaching concentration of arsenic in soil. The dichloromethane content in the soil after remediation was 5 mg / kg, which was lower than the screening value standard (i.e. lower than 94 mg / kg) for Class I land in the "Soil Environmen...

Embodiment 3

[0041] The soil of the arsenic and halogenated hydrocarbon complex polluted plot was excavated, and the arsenic acid leaching concentration in the soil was sampled and detected to be 0.72mg / L, and the PCB content in the soil was 3.18mg / kg. First crush and sieve the acidic composite contaminated soil of arsenic and halogenated hydrocarbons to a particle size ≤ 1cm; add the oxidant in 3 batches according to the molar ratio of 2:1 (oxidant: halogenated hydrocarbons), sprinkle water and stir for 30 minutes to obtain a mixture, and ventilate Curing for 2 days; spreading 30L of microbial solution A and 50L of microbial solution B per ton of contaminated soil, then plowing the soil 3 times, and curing for 5 days. Determination of halogenated hydrocarbon content and acid leaching concentration of arsenic in soil. After remediation, the content of PCBs in the soil was 0.05mg / kg, which was lower than the screening value standard for Class I land in the "Soil Environmental Quality Constr...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a remediation agent and method for acidic compound polluted soil containing arsenic and halogenated hydrocarbons, which comprises ferrate, pseudomonas, acinetobacter and bacillus. The agent mainly uses ferrate to oxidize and decompose halogenated hydrocarbons, and oxidizes and stabilizes arsenic. At the same time, it uses microorganisms to degrade organic halogenated hydrocarbons. The synergistic effect of chemical oxidation and biodegradation can not only restore arsenic and halogenated hydrocarbons Composite polluted soil, and cooperate with each other to complement each other, reduce the amount of oxidant added, improve the repair efficiency, and the halogenated hydrocarbon content after repair is lower than the "Soil Environmental Quality Construction Land Soil Pollution Risk Management and Control Standard (Trial)" (GB 36600‑2018) screening value standard, the acid leaching concentration of arsenic in the soil is lower than the Class IV standard (that is, less than 0.05mg / L) in the "Groundwater Quality Standard" (GB / T14848‑2017).

Description

technical field [0001] The invention relates to a remediation agent for acidic compound polluted soil containing arsenic and halogenated hydrocarbons, in particular to a chemical agent and a repairing method for synergistically repairing acidic compound polluted soil containing arsenic and halogenated hydrocarbons by chemical oxidation and microbial reaction, which belongs to organic-inorganic composite Contaminated soil remediation technology field. Background technique [0002] Arsenic, commonly known as arsenic, is a non-metallic element that exists in the form of three allotropes, gray arsenic, black arsenic and yellow arsenic, and is considered to be the "three substances" that cause cancer, teratogenicity and mutagenesis. Arsenic is widely present in nature , there are hundreds of arsenic mineral has been found. Arsenic and its compounds are used in pesticide , herbicide , pesticides and many kinds of alloy middle. Halogenated hydrocarbons are various and ac...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/10B09C1/08C12N1/20C12R1/38C12R1/01C12R1/07
CPCB09C1/08B09C1/10C12N1/20
Inventor 韩凤刘卫国邵乐史学峰韩宝禄李昌武
Owner 长沙工研院环保有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap