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Heavy metal contaminated soil repair conditioner and application thereof

A technology for polluted soil and heavy metals, applied in the restoration of polluted soil, soil conditioning materials, applications, etc., can solve the problems of reducing the mobility and bioavailability of heavy metals, improve soil fertilizer and water retention capacity, and the use method is simple. Inexpensive effect

Inactive Publication Date: 2017-07-25
山东创业环保科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art, aim at the problem of remediation of heavy metal compound polluted soil, and use agricultural solid waste and clay minerals, which are widely sourced and easy to obtain, as raw materials, to propose a method with sufficient raw materials, low cost and obvious application effect The remediation conditioner for in-situ remediation of heavy metal-contaminated soil and the method of soil remediation using the remediation conditioner to reduce the mobility and bioavailability of heavy metals in the soil, and solve the sustainable utilization problems faced by farmland and industrial and mining sites due to heavy metal pollution

Method used

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  • Heavy metal contaminated soil repair conditioner and application thereof
  • Heavy metal contaminated soil repair conditioner and application thereof
  • Heavy metal contaminated soil repair conditioner and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Select one or more of crop straw, cotton firewood, sawdust, rice husk or animal manure, and pyrolyze and carbonize them under anoxic conditions at 450-650°C to prepare biochar.

[0041] Weigh 10g of the biochar prepared by the above-mentioned method, add it to 100ml mass fraction of 10% Na 2 In the S solution, put a magnetic stirrer, adjust the rotation speed to 200rpm, stir at room temperature for 24h, filter with suction, dry at 105°C, put it in a tube furnace reactor, and heat up to 600°C at a rate of 10°C / min. Insulate for 60 minutes, cool to room temperature under nitrogen protection, wash with deionized water until neutral, and dry at 105°C to obtain sulfur-modified biochar.

[0042] Weigh 4g of the sulfur-modified biochar prepared by the above method, 1g of attapulgite, 1g of zeolite powder, 0.5g of iron powder, and 0.5g of calcium oxide, mix and grind them, and pass through a 100-mesh sieve to obtain a heavy metal-contaminated soil remediation conditioner.

Embodiment 2

[0044] Select one or more of crop straw, cotton firewood, sawdust, rice husk or animal manure, and pyrolyze and carbonize them under anoxic conditions at 450-650°C to prepare biochar.

[0045] Weigh 10g of the biochar prepared by the above-mentioned method, add it to 100ml mass fraction of 10% Na 2 Put in a magnetic stirrer in the S solution, adjust the rotation speed to 200rpm, stir at room temperature for 24h, wash with water, filter with suction, dry in a constant temperature drying oven at 100°C, and age for 16h to obtain sulfur-modified biochar.

[0046] Weigh 5g of the sulfur-modified biochar prepared by the above method, 2g of attapulgite, 2g of zeolite powder, 0.5g of iron powder, and 0.5g of calcium oxide, mix and grind, and pass through a 100-mesh sieve to obtain a heavy metal-contaminated soil remediation conditioner.

Embodiment 3

[0048] Select one or more of crop straw, cotton firewood, sawdust, rice husk or animal manure, and pyrolyze and carbonize them under anoxic conditions at 450-650°C to prepare biochar.

[0049] Weigh 10 g of the biochar prepared by the above method and place it in a tube furnace under SO 2 Sulfur modification was carried out under atmospheric conditions, the modification temperature was 120° C., and the modification time was 5 hours to obtain sulfur-modified biochar.

[0050] Weigh 6g of sulfur-modified biochar prepared by the above method, 1.5g attapulgite, 1.5g zeolite powder, 0.5g iron powder, 0.5g calcium oxide, mix and grind, and pass through a 100-mesh sieve to obtain a heavy metal-contaminated soil remediation conditioner .

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Abstract

On one hand, the invention discloses a heavy metal contaminated soil repair conditioner, which comprises at least one of the following components: sulfur-modified charcoal, attapulgite, zeolite, iron powder and lime substances; and on the other hand, the invention further discloses an application of the heavy metal contaminated soil repair conditioner in repairing of heavy metal contaminated soil. The heavy metal contaminated soil repair conditioner is wide in raw material source, low in cost, simple in preparation and application methods, obvious in repairing effect on soil heavy metal compound pollution, does not cause a risk of secondary pollution, and also has the effects of improving the soil structure and improving the soil fertility. The agriculture-forestry-stockbreeding wastes are taken as one of the main raw materials, so that the problem of treatment is solved and the heavy metal contaminated soil repair conditioner has great popularization and application value.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a heavy metal polluted soil restoration conditioner and application thereof. Background technique [0002] With the continuous acceleration of my country's industrialization and urbanization process, a large amount of waste generated by site activities in mining, smelting, steel, petroleum, chemical and other industries has caused serious damage to industrial enterprise sites and agricultural land through surface geological processes such as the atmosphere, surface runoff, and groundwater. pollute. Among them, the problem of heavy metal pollution in soil is particularly serious: it not only easily causes variation and degradation of soil physical, chemical and biological characteristics, but also endangers human health through enrichment through the food chain. [0003] Due to the urgency and demand of contaminated soil remediation, the research on heavy metal-co...

Claims

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Application Information

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IPC IPC(8): C09K17/04C09K17/06C09K17/12B09C1/08C09K101/00
CPCC09K17/04B09C1/08C09K17/06C09K17/12C09K2101/00
Inventor 张建房彬薛二军王惠勇刘建阔路明铁良于高峰刘宏刚李立伟
Owner 山东创业环保科技发展有限公司
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