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Iron and manganese complex for promoting polyhalogenated organic dehalogenation and detoxification in soil

A technology of halogenated organic compounds and complexes, which is applied in the field of treatment of multi-halogenated organic compounds in soil, to achieve the effects of single particle size, improved processing capacity, and large specific surface area

Active Publication Date: 2007-10-17
GUANGDONG INST OF ECO ENVIRONMENT & SOIL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, iron-manganese complex materials that have practical value and can promote the dehalogenation and detoxification of polyhalogenated organic compounds in soil have not been reported.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The preparation of embodiment 1 iron inorganic ligand complex

[0021] Acidify the iron material with 0.1M-0.7M hydrochloric acid or sulfuric acid first, then let it stand still, filter to remove insoluble impurities, then adjust the pH value of the solution to 6.3-6.9 with 0.2M-0.6M NaOH, stir vigorously for 3-7h and then filter. The filtrate is slowly added to 70%-95% ethanol solution to prepare an iron ion stock solution with a concentration of 35%-65%.

[0022] will contain various inorganic ligand ions (NH 3 , F - , OH - , Cl - 、PO 4 2- , CO 3 2- 、CN - , NO 3 - , SO 4 2- , SO 3 2- 、SCN - , S 2 o 3 2- , I - or Br - ) compound into an original solution with a concentration of 30% to 60%, stirred vigorously for 3 to 7 hours, filtered to remove insoluble impurities, and slowly added to a 70% to 95% ethanol solution to form various inorganic compounds with a concentration of 25% to 60%. body ion stock solution.

[0023] The above iron ion stock sol...

Embodiment 2

[0024] The preparation of embodiment 2 iron organic ligand complexes

[0025] The preparation of the iron ion stock solution is the same as in Example 1.

[0026] Will contain various organic ligand ions (acetate, citrate, ethylenediamine, oxalate, salicylic acid, succinic acid, tartaric acid, 1,10 phenanthroline, acetylacetone, 1,2-cyclohexanediamine -N,N,N,N-tetraacetic acid, 70% dioxane, titanium reagent, BAL, 50% dioxane, ethanolamine, ethylenediamine-N,N,N,N-tetraacetic acid, glycine, N-(2-hydroxyethyl)ethylenediamine-N,N,N-triacetic acid, 8-hydroxyquinoline-5-sulfonic acid, lactic acid, nitrilotriacetic acid, pyridine-2,6-dicarboxylic acid, 8- Hydroxyquinoline, 5-sulfosalicylic acid, TTA, xylenol orange, thioglycolic acid or triethylenetetramine) compound is configured into a concentration of 25% to 60% ethanol solution, vigorously stirred for 3 to 7h, Let stand overnight, filter to remove insoluble impurities, and prepare various organic ligand ion stock solutions for...

Embodiment 3

[0028] The preparation of embodiment 3 manganese inorganic complexes

[0029] The manganese material is first acidified with 0.1M-0.7M hydrochloric acid or sulfuric acid and then left to stand, filtered to remove insoluble impurities, and then the pH value of the solution is adjusted to 6.0-7.6 with 0.2M-0.6M NaOH, stirred vigorously for 3-7 hours and then filtered. The filtrate is slowly added to 70%-95% ethanol solution to configure the ethanol solution with a concentration of 45%-75% to become a manganese ion stock solution.

[0030] The preparation of various inorganic ligand ion stock solutions is the same as in Example 1.

[0031] The preparation of manganese-containing inorganic complex materials is the same as in Example 1.

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PUM

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Abstract

The invention discloses a ferro manganese complexes for advancing the multi-halogenating organism dehalogenation detoxifcation, which is composed of a metallic element and a ligand, with the mol ratio 1:1 to 1:9. The metallic element is iron, manganese or the ferro manganese mixture, while the ligand is an organic ligand or an abio-ligand. The ferro manganese complexes can be applied to advance the dehalogenation detoxifcation of the contamination such as multi-halogenating organism etc, and accelerate the harness of the organic pollutant in the electron rubbish pollution place; meanwhile the natural self-purification capacity of the soil is fully utilized and exerted, by the exogenous matter adjustment, the processing power of the environmental pollutant on the soil is advanced, which has high applying foreground.

Description

technical field [0001] The invention relates to the treatment of polyhalogenated organic matter in soil, in particular to a class of iron-manganese complexes for promoting the dehalogenation and detoxification of polyhalogenated organic matter in soil. Background technique [0002] The dehalogenation transformation of persistent halogenated pollutants is a widespread interfacial process in soil, and it is an important hot issue in soil environmental chemistry and colloid interface chemistry in the world. Polyhalogenated organic compounds in soil mainly include: halogenated aliphatic hydrocarbons, halogenated benzenes, halogenated nitrobenzenes, azo compounds, etc. These pollutants mainly come from industrial pollution sources, pesticides, chemical fertilizers, solid waste (e-waste, etc.), and agricultural utilization, etc., and remain in the soil for a long time, pollute groundwater through geochemical processes, and pollute the entire ecosystem through biogeochemical proces...

Claims

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Application Information

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IPC IPC(8): A62D3/37A62D101/22
Inventor 李芳柏陶亮刘承帅刘亮
Owner GUANGDONG INST OF ECO ENVIRONMENT & SOIL SCI
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