Farmland chromium pollution remediation method under planting production condition

A technology of production conditions and repair methods, applied in the field of soil pollution prevention and control, can solve the problems of large environmental disturbance, high cost, and low environmental risk of heterogeneous treatment, and achieve the effect of meeting the requirements of the conditions, low cost, and low repair cost

Inactive Publication Date: 2016-07-13
INST OF AGRI RESOURCES & ENVIRONMENT SHANDONG ACADEMY OF AGRI SCI
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  • Claims
  • Application Information

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Problems solved by technology

Ectopic treatment has low environmental risk, quick results and high predictabi

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  • Farmland chromium pollution remediation method under planting production condition
  • Farmland chromium pollution remediation method under planting production condition
  • Farmland chromium pollution remediation method under planting production condition

Examples

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Embodiment 1

[0053] A method for remediating farmland chromium pollution under planting and production conditions. The heavy metal chromium-contaminated soil in Jinan City, Shandong Province is selected for remediation, and wheat-corn crop rotation is carried out according to the growing season on the soil to be treated. The specific steps are as follows:

[0054] The heavy metal-contaminated soil to be repaired was tested, and the soil contained 127-310 mg / kg of heavy metal chromium; the area was 10 mu, and the land was prepared and leveled in September 2014, and chemical fertilizers were applied (N:P:k:10:10:5 kg / mu). Passivator and organic fertilizer, passivator application rate: 200 kg / mu, organic fertilizer application rate 200 kg / mu, and then deep plowing;

[0055] The raw material components of the heavy metal passivator and their weight percentages are as follows: 75% of ferrous sulfate, 0.8% of mixed bacteria agent, and 24.2% of aluminum oxide.

[0056] In the mixed microbial agen...

Embodiment 2

[0061] A method for repairing chromium pollution in farmland under planting and production conditions. The chromium pollution in Zhaoyuan, Shandong Province was repaired in 2014-2015, and wheat-corn crop rotation was carried out on the soil to be treated according to the growing season. The specific steps are as follows:

[0062] The heavy metal-contaminated soil to be repaired is tested, and the chromium content in the soil is 237-369mg / kg. The area is 50 mu. In the first ten days of March 2014, the land was prepared and leveled, chemical fertilizers were applied (N:P:k:10:10:5 kg / mu), passivating agents and organic fertilizers were applied, and the application rate of passivating agents: 200 kg / Mu, the application rate of organic fertilizer is 200 kg / mu, and then deep plowing;

[0063] The raw material components of the heavy metal deactivator and their weight percentages are as follows: 70% of ferrous sulfate, 0.5% of mixed bacteria agent, and 29.5% of aluminum oxide.

[...

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Abstract

The invention relates to a farmland chromium pollution remediation method under a planting production condition. The farmland chromium pollution remediation method comprises the following steps: performing crop rotation of wheat and corn on soil to be treated according to growth seasons, and applying an organic fertilizer at least before seeding of wheat and corn, wherein a heavy metal passivator consists of the following components in percentage by weight: 64-75% of ferrous sulfate, 0.2-1% of compound bacteria and 0-35% of aluminum oxide; the organic fertilizer is one or a combination of two of wormcast, commercial organic fertilizers and cow dung. The passivation remediation technique provided by the invention is relatively low in remediation cost, normal planting and production of cereal crops are not affected, moreover, a bio-availability passivation effect on the Cr element can be achieved, and the condition requirements on heavy metal polluted soil remediation can be relatively well met. As ferrous sulfate and the active compound bacteria are induced to have oxidation reduction with Cr in the soil, Cr can be transformed to be trivalent from hexavalent, and CrO2- and Cr3+ compound precipitate can be formed.

Description

technical field [0001] The invention relates to a repair method for farmland chromium pollution under planting and production conditions, and belongs to the field of soil pollution prevention and control. Background technique [0002] With the substantial increase of my country's population, the acceleration of urbanization, and the rapid development of industry and agriculture, a large number of "three wastes (exhaust gas, wastewater and solid waste)" substances containing heavy metals have been produced. Wastes enter the farmland soil through various channels, resulting in the continuous accumulation of heavy metals in the soil, and even exceeding the standard. The agricultural products produced on these soils pose a serious threat to human health. [0003] According to the "National Soil Pollution Survey Bulletin" jointly issued by the Ministry of Environmental Protection and the Ministry of Land and Resources in 2014. The survey results show that the overall situation o...

Claims

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Application Information

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IPC IPC(8): B09C1/08B09C1/10
CPCB09C1/08B09C1/105B09C2101/00
Inventor 井永苹李彦刘兆辉薄录吉耿立清
Owner INST OF AGRI RESOURCES & ENVIRONMENT SHANDONG ACADEMY OF AGRI SCI
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