Remediation agent for heavy metal contaminated soil of mining area and preparation method of remediation agent

A technology that pollutes soil and heavy metals. It is applied in soil conditioning materials, chemical instruments and methods, and other chemical processes. It can solve problems such as nutritional imbalance, high cost, and lack of nutrients in mining soil, and achieve high surface energy and strong adsorption. , the effect of large specific surface area

Active Publication Date: 2016-05-11
SHENZHEN TECHAND ECOLOGY & ENVIRONMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the stabilization and remediation technology started relatively late in China, judging from the current soil remediation and treatment technology market, stabilization technology is expected to become the main force in the field of soil heavy metal pollution remediation technology, but the cost of remediation agents for heavy metal contaminate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Prepare ceramic powder: take the discarded ceramic filter element of the water purifier, soak in acid, rinse, grind, sieve, and dry to obtain ceramic powder, pass through a 100-mesh sieve, the particle size of the ceramic powder is ≤ 150 microns, and weigh 55 parts by mass ceramic powder; take wood residues, straw, litter, and anoxic high-temperature firing to obtain biomass carbon materials, weigh 4 parts by mass of biomass carbon materials; then weigh 2.0 parts by mass of phosphate rock, grind, pass 60 mesh sieve; take the mixture of leguminous plants and straw, pulverize, compost, and obtain the organic fertilizer, wherein the leguminous plants are at least one of white clover, black locust safflower, and Rhizoma multiflora; weigh 0.5 parts by mass Silica powder, 0.5 parts by mass of calcium oxide and 2 parts by mass of organic fertilizer are stirred and mixed with the prepared ceramic powder and the prepared biomass carbon material to prepare a repair agent for heavy...

Embodiment 2

[0023] Preparation of ceramic powder: take the discarded ceramic filter element of the water purifier, soak in acid, rinse, grind, sieve, and dry to obtain ceramic powder, pass through a 100-mesh sieve, the particle size of the ceramic powder is ≤ 150 microns, and weigh 80.0 parts by mass ceramic powder; take wood residues, straw, litter, and anaerobic high-temperature firing to obtain biomass carbon materials, weigh 11 parts by mass of biomass carbon materials; then weigh 9.5 parts by mass of phosphate rock, grind, pass 60 mesh sieve; take the mixture of leguminous plants and stalks, pulverize, compost, and obtain the organic fertilizer, wherein the leguminous plants are at least one of white clover, black locust safflower, and Rhododendron multiflora; weigh 9 parts by mass Silica powder, 9 parts by mass of calcium oxide and 13 parts by mass of organic fertilizer were stirred and mixed with the prepared ceramic powder and the prepared biomass carbon material to prepare a remed...

Embodiment 3

[0025] Preparation of ceramic powder: take the discarded ceramic filter element of the water purifier, soak in acid, rinse, grind, sieve, and dry to obtain ceramic powder, pass through a 100-mesh sieve, the particle size of the ceramic powder is ≤ 150 microns, and weigh 71.0 parts by mass ceramic powder; take wood residues, straw, litter, and anoxic high-temperature firing to obtain biomass carbon materials, weigh 8 mass parts of biomass carbon materials; then weigh 6 mass parts of phosphate rock, grind, and pass 60-mesh sieve; take leguminous plant, straw mixture, pulverize, compost, obtain the organic fertilizer, wherein said leguminous plant is at least one in white clover, safflower black locust, multiflora; Weigh 5 parts by mass Silica powder, 5 parts by mass of calcium oxide and 10 parts by mass of organic fertilizer were stirred and mixed with the prepared ceramic powder and the prepared biomass carbon material to prepare a remediation agent for heavy metal contaminated ...

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PUM

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Abstract

The invention discloses a remediation agent for heavy metal contaminated soil of a mining area and a preparation method of the remediation agent. The remediation agent is prepared from ceramic powder, a biomass carbon material, a phosphate-containing material, silicon micropowder, organic fertilizer and calcium oxide and/or calcium hydroxide, wherein the ceramic powder is prepared from discarded ceramic filter elements of water purifiers through the steps of acid soaking, flushing and grinding, and the biomass carbon material is prepared from wood residues, straw and dry branches and fallen leaves through anoxic high-temperature burning. The powder prepared from the ceramic filter elements is large in specific surface area, is provided with functional groups on the surface, has high adsorptivity, caking property, suspension property and cation exchange capacity and has a good binding effect on heavy metal cations in the soil; the biomass carbon material can effectively bind heavy metal and achieve complexing of the heavy metal on the surface groups and inside pore channels; the organic fertilizer can provide nutritional elements and can further achieve complexing of the heavy metal elements; the remediation agent is low in cost and can stabilize and passivate the heavy metal and can further supplement the fertility of the soil.

Description

technical field [0001] The invention relates to the technical field of remediation of heavy metal-contaminated soil, in particular to a remediation agent for heavy metal-contaminated soil in mining areas and a preparation method thereof. Background technique [0002] my country is the third largest mining country in the world. The development of mineral resources has promoted economic prosperity, social progress and human civilization. However, due to the lack of establishment and implementation of the corresponding legal system for the protection and governance of the mine ecological environment, the development of mineral resources is separated from environmental protection, and mining companies only focus on economic benefits and ignore the ecological environment, resulting in a large number of mine environmental problems. One of the most serious problems is the heavy metal pollution in the soil. Many soil pollution phenomena have appeared in Hunan, Guangxi and other pla...

Claims

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Application Information

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IPC IPC(8): C09K17/40C05G3/04C09K101/00C09K109/00C05G3/80
CPCC05G3/80C09K17/40C09K2101/00C09K2109/00
Inventor 刘登彪任重黄雷龚亚龙王成聪
Owner SHENZHEN TECHAND ECOLOGY & ENVIRONMENT CO LTD
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