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Remediation method for heavy metal pollution in soil

A technology of pollution remediation and heavy metal, applied in the field of soil pollution control, can solve the problems of difficulty in remediation of heavy metal deep pollution, insignificant effect, long plant cycle, etc., and achieve the effects of reducing agricultural production pollution, accelerating crop growth, and promoting crop growth.

Inactive Publication Date: 2019-01-04
INST OF AGRI RESOURCES & REGIONAL PLANNING CHINESE ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a soil heavy metal pollution restoration method to solve the technical problems of long cycle, insignificant effect and difficult heavy metal deep pollution restoration in the current phytoremediation process

Method used

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  • Remediation method for heavy metal pollution in soil
  • Remediation method for heavy metal pollution in soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Embodiment 1: A kind of soil heavy metal pollution remediation method

[0047] Specific steps are as follows:

[0048] (1) Pass the heavy metal cadmium-contaminated soil through a 2 mm sieve, and put the sieved soil into plastic bags with sponge ventilation lids, 2 kg per bag;

[0049] (2) Configure the nutrient solution to adjust the soil nutrients to excess, and at the same time adjust the soil water content to 20%;

[0050] Wherein, the added amount of excess nutrient is N 90-110 mg·kg -1 Soil, P 90~110 mg·kg -1 Soil, K 90~110 mg·kg -1 Soil, trace elements iron, copper, manganese, zinc, molybdenum, boric acid 4-6 mg·kg -1 earth;

[0051] (3) Sterilize the packed soil with 40 kGy gamma;

[0052] (4) Plant corn seedlings, and the rest of the farming management measures are the same as the farmland customary methods.

Embodiment 2

[0053] Embodiment 2: A kind of soil heavy metal pollution remediation method

[0054] Specific steps are as follows:

[0055] (1) Take heavy metal cadmium-contaminated soil and pass it through a 2.5 mm sieve, and put the sieved soil into plastic bags with sponge ventilation lids, 2 kg per bag;

[0056](2) Configure nutrient solution to adjust the soil nutrients to excess, and at the same time adjust the soil water content to 25%;

[0057] Wherein, the added amount of excess nutrient is N 90-110 mg·kg -1 Soil, P 90~110 mg·kg -1 Soil, K 90~110mg·kg -1 Soil, trace elements iron, copper, manganese, zinc, molybdenum, boric acid 4-6 mg·kg -1 earth;

[0058] (3) Sterilize the packed soil with ammonia water at an application rate of 0.54 ml kg -1 Soil, sealed for 2 weeks after treatment, and mixed once every 3 days;

[0059] (4) Plant corn seedlings, and the rest of the farming management measures are the same as the farmland customary methods.

Embodiment 3

[0060] Embodiment 3: A kind of soil heavy metal pollution remediation method

[0061] Specific steps are as follows:

[0062] (1) Take heavy metal cadmium-contaminated soil and pass it through a 2 mm sieve, and put the sieved soil into plastic bags with sponge ventilation lids, 2 kg per bag;

[0063] (2) Configure nutrient solution to adjust the soil nutrients to excess, and at the same time adjust the soil water content to 25%;

[0064] Wherein, the added amount of excess nutrient is N 90-110 mg·kg -1 Soil, P 90~110 mg·kg -1 Soil, K 90~110 mg·kg -1 Soil, trace elements iron, copper, manganese, zinc, molybdenum, boric acid 4-6 mg·kg -1 earth;

[0065] (3) Sterilize the packed soil with chloropicricin at an application rate of 65 mg·kg -1 Soil, sealed for 2 weeks after treatment, and mixed once every 3 days;

[0066] (4) Plant corn seedlings, and the rest of the farming management measures are the same as the farmland customary methods.

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Abstract

The invention discloses a remediation method for heavy metal pollution in soil, and the method is: loosing and ventilating the polluted soil; adding nutrient components into the soil and adjusting thewater content of the soil to 20-30%: sterilizing soil by radiation or applying chloropicrin; planting maize, the other cultivation management measures are the same as the local farmland habitual method; harvesting all the maize plants when the maize plants are grown to the maximum biomass; or, loosing and ventilating the polluted soil; adding nutrient components into the soil and adjusting the soil moisture content to 20-30%: planting maize; when the maize grows to two leaves and one heart, applying Atailing to the maize plant, and the other cultivation management measures are the same as thelocal farmland habitual method; harvesting all the maize plants when the maize plant grows to the maximum biomass. The method of the invention solves the problems of long cycle in current phytoremediation process and difficulties in remediation of deep contamination of heavy metals, can improve the absorption of heavy metals, and provides technical support for the remediation of heavy metal in the soil.

Description

technical field [0001] The invention relates to the technical field of soil pollution control, in particular to a soil heavy metal pollution restoration method. Background technique [0002] In recent years, due to the rapid development of industrial and agricultural production, the indiscriminate application of "three wastes" and various chemical products, pesticides, fertilizers, and herbicides, the pollution of heavy metals to soil and water has become more and more serious. The area of ​​sewage irrigated farmland in my country has reached more than 10 million hm 2 , 30% of the soil is polluted by heavy metals such as cadmium, mercury, lead, copper, etc. in varying degrees, resulting in the reduction of tens of millions of tons of grain production. Among them, cadmium (Cd) pollution is the most prominent, with about 13,000 hm 2 Cultivated land is polluted by cadmium. [0003] Cadmium is a heavy metal with strong toxicity to animals and plants. It is a class IA carcinog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/10B09C1/00
CPCB09C1/00B09C1/10B09C1/105
Inventor 范分良宋阿琳卢玉秋李艳玲张亚磊蒋胜勇
Owner INST OF AGRI RESOURCES & REGIONAL PLANNING CHINESE ACADEMY OF AGRI SCI
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