Passivator for farmland heavy metal contaminated soil, and preparation method and application of passivator

A technology that pollutes soil and heavy metals. It is applied in the direction of chemical instruments and methods, applications, and soil conditioning materials. It can solve problems such as affecting the environment and wasting resources, and achieve the effects of reducing application, increasing soil porosity, and increasing organic matter content.

Inactive Publication Date: 2018-04-10
湖南本农环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional treatment of waste in production is mainly treated as garbage, which not only affects the environment but also wastes resources

Method used

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  • Passivator for farmland heavy metal contaminated soil, and preparation method and application of passivator
  • Passivator for farmland heavy metal contaminated soil, and preparation method and application of passivator
  • Passivator for farmland heavy metal contaminated soil, and preparation method and application of passivator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Formula 1: 100 parts of diatomite powder, 5 parts of ferrihydrite, 1 part of quicklime, and 8 parts of betel nut waste powder.

[0037] Formula 2: 100 parts of diatomite powder, 2 parts of apatite, 1 part of quicklime, and 8 parts of betel nut waste powder.

[0038]Formula 3: 100 parts of diatomite powder, 5 parts of ferrihydrite, 2 parts of apatite, 1 part of quicklime, and 8 parts of decomposed betel nut waste powder.

[0039] Formula 4: 100 parts of diatomite powder, 5 parts of ferrihydrite, 2 parts of apatite, 1 part of quicklime, and 8 parts of betel nut waste powder.

[0040] Formula 5: 100 parts of sepiolite powder, 3 parts of goethite, 3 parts of sodium phosphate, 2 parts of quicklime, 12 parts of betel nut waste powder.

[0041] Formula 6: 100 parts of bentonite powder, 8 parts of hematite, 1.5 parts of apatite, 2 parts of quicklime, and 6 parts of betel nut waste powder.

[0042] Above formula 1~6 is prepared into soil conditioner by following specific metho...

Embodiment 2

[0049] Field plot application test of the above formulations 1-6 soil remediation agents:

[0050] 1) Take the farmland polluted by heavy metals in a certain town in Hunan Province, and conduct a field plot experiment. The cadmium content in the soil is 0.62mg / kg, and the experimental material is rice.

[0051] The test field was divided into 28 test plots, with 7 treatments in total, and 4 parallels for each treatment. One treatment was used as the control group without adding soil remediation agent, and formulas 1 to 6 were all taken as one treatment. The area of ​​the plot is 4m×5m, arranged randomly. At the beginning of the experiment, no fertilizer was applied to the test field, the field was plowed and leveled, and single-row and single-irrigation were implemented to prevent the spread of fertilizer and water between plots. Apply soil remediation agent to the corresponding plot for each treatment, and the soil passivation agent addition rate is 200kg / mu. The soil passiv...

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PUM

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Abstract

The invention discloses a passivator for farmland heavy metal contaminated soil, and a preparation method and application of the passivator. The passivator for the farmland heavy metal contaminated soil is mainly composed of clay minerals, iron-based minerals, phosphorus-based compounds, areca waste powder, a pH regulator and the like. The preparation method comprises the following steps: drying and crushing areca nuts, areca seed kernels, areca branches and the like generated in an areca-nut production process, then mixing the dried and crushed areca waste powder with the clay minerals, the iron-based minerals and the phosphorus-based compounds, then adjusting the pH value by adopting the pH regulator to obtain the passivator. The passivator is applied to the farmland heavy metal contaminated soil, dissociative heavy metal ions in the soil can be efficiently adsorbed and fixed, so that heavy metals entering crops can be effectively reduced, the original ecological environment and thesoil structure are not damaged, meanwhile the soil fertility can be improved, the harm of harmful organisms in the soil can be reduced, and the yield of the crops can be increased.

Description

technical field [0001] The present invention relates to a soil conditioner, in particular to a passivator for farmland heavy metal polluted soil, and to a method for second reproduction by using the defective areca nuts, betel nut kernels and betel nut branches discarded in the production process of betel nuts Utilize, compound with clay minerals, iron-based minerals and phosphorus-based compounds to obtain farmland heavy metal polluted soil passivators that can improve soil fertility and effectively fix heavy metals such as cadmium, lead, mercury, nickel, copper, chromium, zinc, etc. The invention belongs to the technical field of heavy metal polluted soil treatment. Background technique [0002] Betel nut is the second largest tropical economic crop in Hainan after rubber, with an annual output value of more than 10 billion yuan. There are many consumers of betel nut in Hunan, Hainan, Fujian, Taiwan, Guangdong and other provinces in China. In recent years, its chewing area...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40C09K109/00C09K101/00
CPCC09K17/40C09K2101/00C09K2109/00
Inventor 刘建华刘登彪刘刚韩建均赵川张美辉
Owner 湖南本农环境科技有限公司
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