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Compound eluting agent and using method thereof

A technology of leaching agent and solution, which is applied in the field of compound leaching agents, can solve the problems of destroying the physical and chemical properties of soil, large differences in leaching efficiency, and limited removal efficiency, and achieve short leaching time, good biodegradability, Ease of recycling

Active Publication Date: 2018-12-21
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The invention provides a compound leaching agent and its use method, which solves the existing leaching agents that destroy the physical and chemical properties of soil, have large differences in leaching efficiency for different heavy metals, have limited removal efficiency, and have high processing costs. question

Method used

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  • Compound eluting agent and using method thereof
  • Compound eluting agent and using method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] 0.1mol / L EDTA-2Na (disodium ethylenediaminetetraacetic acid) solution and 0.2mol / L tartaric acid solution are mixed in equal volumes, and the solid-liquid ratio (g:ml) is 1:5 to 4.00g Add 20ml of compound eluent to the contaminated soil, place it in a shaker at room temperature for 150r.min -1 After shaking for 4 hours, let it stand for 30 minutes, take an appropriate amount of supernatant and pass it through a 0.45 μm filter membrane, and measure the content of Cu (copper), Ni (nickel), and Zn (zinc).

Embodiment 2

[0027] Mix and compound 0.2mol / L EDTA-2Na solution and 0.2mol / L tartaric acid solution in equal volumes, add 20ml of the compound to 2.00g of contaminated soil for rinsing according to the solid-to-liquid ratio (g:ml) of 1:10 agent, placed in a shaker at room temperature 180r.min -1 After shaking for 6 hours, let it stand for 1 hour, take an appropriate amount of supernatant and pass it through a 0.45 μm filter membrane, and measure the contents of Cu, Ni and Zn therein.

Embodiment 3

[0029] Mix and compound 0.1mol / L EDTA-2Na solution and 0.4mol / L tartaric acid solution in equal volumes, add 20ml of the compound to 4.00g of contaminated soil for rinsing according to the solid-to-liquid ratio (g:ml) of 1:5 agent, placed in a shaker at room temperature 150r.min -1 After shaking for 4 hours, let it stand for 30 minutes, take an appropriate amount of supernatant and pass it through a 0.45 μm filter membrane, and measure the content of Cu, Ni and Zn in it.

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Abstract

The invention relates to the technical field of soil heavy metal contamination repair, in particular to a compound eluting agent and a using method thereof. The main component of the compound elutingagent is an ethylene diamine tetraacetic acid solution and a tartaric acid solution, and the molar concentration ratio of the ethylene diamine tetraacetic acid solution to the tartaric acid solution is 1:4-1. The using method comprises the steps that the compound eluting agent is prepared by using the ethylene diamine tetraacetic acid solution and the tartaric acid solution; a solid-liquid mixtureis added to the heavy metal contaminated soil, the solid-liquid mixture is shaken and eluted; and the solid-liquid mixture stands still; supernatant of the shaken solid-liquid mixture is taken and filtered, and the concentration of heavy metal is measured by a flame atomic absorption spectrophotometer. According to the compound eluting agent and the using method thereof, technical problems that that an existing eluting agent has the physical and chemical properties of destroying the soil, the difference in the eluting efficiency of different heavy metal is large, the removal efficiency is limited, and the treatment cost is high are solved.

Description

technical field [0001] The invention relates to the technical field of remediation of soil heavy metal pollution, in particular to a compound leaching agent and a use method thereof. Background technique [0002] Soil heavy metal pollution refers to the phenomenon that the content of heavy metal elements in the soil exceeds the background value and causes the deterioration of the quality of the ecological environment. Heavy metals have the characteristics of long residual time, high toxicity, strong concealment and cannot be degraded by microorganisms. According to the national survey of sewage irrigation areas conducted by the Ministry of Agriculture of my country, in the sewage irrigation areas of about 1.4 million hectares, the land area polluted by heavy metals accounts for 64.8% of the area of ​​sewage irrigation areas. Contaminated grain is as high as 12 million tons per year, and the total economic loss is at least 20 billion yuan. [0003] Soil leaching technology i...

Claims

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Application Information

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IPC IPC(8): B09C1/02
CPCB09C1/02
Inventor 林亲铁程帅龙项江欣尹光彩刘千钧张晓峰罗昊昱
Owner GUANGDONG UNIV OF TECH