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A method of using key organic matter to induce the stabilization of active heavy metals

A heavy metal and organic matter technology, applied in chemical instruments and methods, sludge treatment, water/sludge/sewage treatment, etc., can solve the problems of long bioremediation cycle, secondary pollution, soil replacement damage, etc., and achieve low climate impact. , the effect of short cycle and short technology

Active Publication Date: 2022-06-21
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of high cost, damage to the original ecological environment by soil replacement, secondary pollution caused by rinsing, long bioremediation cycle and low consumption capacity in the current heavy metal pollution restoration technology, and to provide a A Method for Inducing the Stabilization of Active State Heavy Metals Using Key Organic Matter

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] S1, select the product that sludge obtains through aerobic fermentation as raw material, in the hexadecyl methyl ammonium bromide solution of 5% mass concentration, add the decalin solution whose mass ratio is 1%, soak the raw material with this mixed solution After 5 hours, sulfuric acid solution was added to make the molar concentration of concentrated acid in the mixture to be 0.5 mol / L, and soaking was continued for 5 hours. After that, the supernatant was removed and rinsed with distilled water to obtain a residue free of easily degradable organic matter. The residue contained inorganic salts and rich amino groups. , hydroxyl, quinone group nitrogen-containing heterocyclic compounds (identified by optical FTIR, XPS) key organic matter, the nitrogen content of the residue is 10mg / g dry weight, the cation exchange capacity is 100cmol(+) / kg dry weight, the key organic matter is The content is the mass of the volatile total solids in the residue, and the mass ratio of t...

Embodiment 2

[0043] S1, select the product obtained by anaerobic digestion of sludge and kitchen as raw material, in the hexadecyl methyl ammonium bromide solution of 5% mass concentration, add the decalin solution whose mass ratio is 2%, use this mixture After soaking the raw material in the solution for 10 hours, add sulfuric acid solution to make the molar concentration of concentrated acid in the mixture 1 mol / L, continue to soak for 10 hours, then remove the supernatant and rinse with distilled water to obtain a residue free of easily degradable organic matter, the residue contains inorganic salts and rich The key organic matter of nitrogen-containing heterocyclic compounds containing amino groups, hydroxyl groups and quinone groups (identified by optical FTIR and XPS), the nitrogen content of the residue is 5mg / g dry weight, and the cation exchange capacity is 40cmol(+) / kg dry weight, the key The content of organic matter is the mass of volatile total solids in the residue, and the ma...

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Abstract

The invention relates to a method for using key organic matter to induce the stabilization of activated heavy metals. Materials containing activated heavy metals are mixed with key organic matter containing nitrogen-containing heterocyclic compounds; activated heavy metals form organically bound heavy metals under the action of key organic matter ; Add primary minerals, organically bound heavy metals are induced secondary mineralization, new minerals are formed on the surface of primary minerals, and transformed into stable residue heavy metals. The present invention can stabilize activated heavy metals in situ without changing soil or washing, greatly reducing the cost of heavy metal stabilization and avoiding the generation of washing wastewater. Compared with heavy metal biological immobilization technology, the cycle is shorter, the operation is simple, and it is less affected by the climate. , and the addition of key organic matter is conducive to the subsequent restoration of fertilizer efficiency and regreening of the utilization scene.

Description

technical field [0001] The invention relates to the field of heavy metal pollution prevention and control, in particular to a method for inducing the stabilization of activated heavy metals by utilizing key organic matter. Background technique [0002] Heavy metals generally exist in nature in natural concentrations. However, due to the increasing activities of human mining, smelting, processing and commercial manufacturing of heavy metals, many heavy metals such as lead, mercury, cadmium, and cobalt enter the atmosphere, water, and soil. cause serious environmental pollution. Due to the characteristics of concealment, long-term and hysteresis of heavy metal pollution in soil, sediment or sludge, the harm caused by larger air pollution and water pollution is more serious. Heavy metals cannot be biodegraded, but they are bioaccumulative and can directly threaten higher organisms including humans. Therefore, the control and treatment of heavy metal pollution in soil, sedimen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/00C02F101/20
CPCC02F11/004C02F2101/20
Inventor 陈思思董滨徐祖信
Owner TONGJI UNIV
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