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Composite passivator applicable to rice field soil cadmium pollution and preparation method and application thereof

A passivating agent, cadmium pollution technology, applied in chemical instruments and methods, applications, soil conditioning materials, etc., can solve the problems of large damage to soil properties, unsustainable and insufficient passivation of organic passivating agents, etc., to improve soil The effect of cultivating, ensuring food security, and promoting the reduction of

Active Publication Date: 2016-05-18
山东地宝土壤修复科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems in the prior art that inorganic passivators have great damage to soil properties, the passivation effect of organic passivators is not long-lasting, and there are insufficient problems in single application, the present invention provides a kind of passivator that can simultaneously reduce the effect of passivators on soil properties. Composite passivator for soil heavy metal cadmium pollution that can destroy the degree of destruction and strengthen the passivation effect of the passivator.

Method used

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  • Composite passivator applicable to rice field soil cadmium pollution and preparation method and application thereof
  • Composite passivator applicable to rice field soil cadmium pollution and preparation method and application thereof
  • Composite passivator applicable to rice field soil cadmium pollution and preparation method and application thereof

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Effect test

Embodiment 1

[0031] According to the compound passivator formula, weigh 30kg of chitosan, 25kg of sodium bentonite, 20kg of bone powder, 20kg of limestone, 10kg of biochar, 5kg of ZnO, and 5kg of nano-FeO. Grinding and sieving, fully grinding the dried raw materials, passing through 60 and 100 mesh sieves, taking materials with a particle size of less than 60 mesh and greater than or equal to 100 mesh, fully stirring until uniformly mixed, and obtaining a composite passivator.

Embodiment 2

[0033] According to the compound passivation agent formula, weigh 20kg of chitosan, 35kg of sodium bentonite, 25kg of bone powder, 15kg of limestone, 15kg of biochar, 10kg of ZnO, and 10kg of nanometer FeO. Grinding and sieving, fully grinding the dried raw materials, passing through 60 and 100 mesh sieves, taking materials with a particle size of less than 60 mesh and greater than or equal to 100 mesh, fully stirring until uniformly mixed, and obtaining a composite passivator.

Embodiment 3

[0035] According to the compound passivator formula, weigh 45kg of chitosan, 20kg of sodium bentonite, 15kg of bone meal, 25kg of limestone, 5kg of biochar, 3kg of ZnO, and 8kg of nanometer FeO. Grinding and sieving, fully grinding the dried raw materials, passing through 60 and 100 mesh sieves, taking materials with a particle size of less than 60 mesh and greater than or equal to 100 mesh, fully stirring until uniformly mixed, and obtaining a composite passivator.

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Abstract

The invention provides a composite passivator applicable to rice field soil cadmium pollution. The composite passivator is mainly prepared from chitosan, sodium bentonite, bone meal, lime, charcoal, ZnO and nanometer FeO. The invention further provides a preparation method and application of the composite passivator. By means of the composite passivator, the available cadmium content in rice and the cadmium content in rice can be remarkably reduced, the soil pH value can be improved, vast rice soil polluted by heavy metal cadmium can be treated, the organic matter content is greatly improved, and the soil biology-chemical characteristic is improved.

Description

technical field [0001] The invention belongs to the technical field of soil improvement and environmental protection, and in particular relates to a composite passivator suitable for paddy field soil cadmium pollution and its preparation method and application. Background technique [0002] In recent years, due to the excessive discharge of industrial wastewater and the widespread use of various fertilizers and pesticides, heavy metal pollution has become increasingly serious. With the development of industrial and mining industries, human activities have become more and more involved in the soil environment, and heavy metal pollution has become increasingly serious. The heavy metals that have the greatest impact on the ecological environment and human health mainly include Hg, Cd, Pb, and As. Cadmium (Cadmium, Cd) is one of the most important heavy metal pollutants. It has strong chemical activity in the soil. Compared with other heavy metals, it is more easily absorbed by ...

Claims

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Application Information

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IPC IPC(8): C09K17/40C09K101/00
Inventor 王凯荣宋宁宁赵辉刘君
Owner 山东地宝土壤修复科技有限公司
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