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Soil in-situ remediation and heavy metal removing method

An in-situ remediation, heavy metal technology, applied in the field of soil remediation, can solve the problems of slow remediation time and long cycle, and achieve the effect of slowing nitrogen release, reducing content and improving nitrogen use efficiency

Inactive Publication Date: 2018-11-06
CHONGQING VOCATIONAL INST OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the restoration plants described in this method are annual crops, the cycle is long, and the restoration time is relatively slow.

Method used

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  • Soil in-situ remediation and heavy metal removing method

Examples

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Effect test

Embodiment 1

[0020] The method for removing heavy metals in soil by repairing in situ of the present embodiment comprises the following steps:

[0021] a. Dilute the composite material with water (the weight ratio of composite material to water is 1:10) and spray it on heavy metal-contaminated soil at 100L / acre, apply once every other week, and apply continuously for one month;

[0022] b. Mix the modified traditional Chinese medicine dregs with organic fertilizers and sow them into heavy metal-contaminated soils by mechanical tillage;

[0023] c. Watering by weighing method to keep the soil water content is 50% of the water holding capacity of the treated land for 7 days;

[0024] The composite raw material comprises the following components by weight: 10 parts of sodium persulfate, 5 parts of sodium polyepoxysuccinate, 1 part of polyvinylpyrrolidone, 1 part of nano-carbon, 1 part of serpentine, 5 parts of lignite humic acid 1 part, 1 part of surfactant, 4 parts of calcium dioxide, 1 par...

Embodiment 2

[0031] The method for removing heavy metals in soil by repairing in situ of the present embodiment comprises the following steps:

[0032] a. Dilute the composite material with water (the weight ratio of composite material to water is 1:10) and spray it on heavy metal-contaminated soil at 200L / acre, apply once every other week, and apply continuously for one month;

[0033] b. Mix the modified traditional Chinese medicine dregs with organic fertilizers and sow them into heavy metal-contaminated soils by mechanical tillage;

[0034] c. adopt weighing method to water and keep the soil water content as 60% of the water holding capacity of the treated land for 10 days;

[0035] The composite raw material comprises the following components in parts by weight: 20 parts of sodium persulfate, 10 parts of sodium polyepoxysuccinate, 5 parts of polyvinylpyrrolidone, 3 parts of nano-carbon, 5 parts of serpentine, 10 parts of lignite humic acid Parts, 3 parts of surfactant, 8 parts of cal...

Embodiment 3

[0042] The method for removing heavy metals in soil by repairing in situ of the present embodiment comprises the following steps:

[0043] a. Dilute the composite material with water (the weight ratio of composite material to water is 1:10) and spray it on heavy metal-contaminated soil at 100L / acre, apply once every other week, and apply continuously for one month;

[0044] b. Mix the modified traditional Chinese medicine dregs with organic fertilizers and sow them into heavy metal-contaminated soils by mechanical tillage;

[0045] c. Watering by weighing method to keep the soil water content is 60% of the water holding capacity of the treated land for 7 days;

[0046] The composite material raw material comprises the following components by weight: 10 parts of sodium persulfate, 10 parts of sodium polyepoxysuccinate, 1 part of polyvinylpyrrolidone, 3 parts of nano-carbon, 1 part of serpentine, 10 parts of lignite humic acid 1 part, 1 part of surfactant, 8 parts of calcium di...

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Abstract

The invention discloses a soil in-situ remediation and heavy metal removing method. The method comprises the steps that a, a composite material is diluted with water and then sprayed to heavy-metal contaminated soil according to the proportion of 100-200 L / mu, and the composite material is applied every other week and applied continuously for one month; b, modified Chinese medicine residue and organic manure are mixed and sown in the heavy-metal contaminated soil by adopting a tractor-ploughing method; and c, weighing method watering is adopted for keeping the soil water content to be 50-60% of the treated soil water-holding capacity and is performed for 7-10 days successively. Soil contaminated with various heavy metals such as Pb, Cd, Cu, Zn, Cr and As and toxic organic substances such as chlorinated organic compounds, bromo-organic matters and antibiotics can be remediated, the form that the heavy metal activity and biological availability in the soil are high is relieved, the heavymetals are prevented from migrating and transforming to plants from the soil, biological concentration and amplification of the heavy metals are avoided, the heavy metals such as Cr and Hg in the soil can be efficiently removed, the original functions of the soil are restored, agricultural development requirements are met, the ecological safety of the plants such as crops is guaranteed, and accordingly, ecological risks, caused by biological amplification and concentration of the heavy metals, to the people are avoided.

Description

technical field [0001] The invention relates to the field of soil remediation, in particular to a method for in-situ remediation and removal of soil heavy metals. Background technique [0002] Soil is the most active layer of the earth's surface system, the cornerstone for human survival and development, and an important material basis for ensuring the safety of human food and ecological environment. With the development of industry and the modernization of agricultural production, heavy metal pollution in soil has become one of the main problems that endanger the quality of the global environment. Heavy metal elements are potential pollutants, which are difficult to be degraded by soil microorganisms. Once they enter the soil, it is very difficult to treat them. Soil heavy metal pollution mainly comes from industrial production, agricultural production and transportation. They will not only lead to the decline of soil vitality and reduce food production, but also can accu...

Claims

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Application Information

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IPC IPC(8): B09C1/08C09K17/40
CPCB09C1/08B09C2101/00C09K17/40
Inventor 王金霞何清明赵雪詹玲玲
Owner CHONGQING VOCATIONAL INST OF ENG
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