Composite soil passivator for reducing contents of cadmium and lead as well as preparation method and application method of composite soil passivator

A technology of lead content and passivating agent, applied in application, fertilizer mixture, fertilization device, etc., can solve problems such as difficult to meet repair standards, unsatisfactory repair effect, and damage to soil quality, so as to improve the status of available nutrients and improve soil Cultivability and the effect of increasing soil pH

Active Publication Date: 2014-12-10
湖南润邦生物工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Most of the existing remediation technologies use a single organic passivator or inorganic passivator. With the increase of the risk of heavy metal pollution in rice field soil

Method used

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  • Composite soil passivator for reducing contents of cadmium and lead as well as preparation method and application method of composite soil passivator
  • Composite soil passivator for reducing contents of cadmium and lead as well as preparation method and application method of composite soil passivator
  • Composite soil passivator for reducing contents of cadmium and lead as well as preparation method and application method of composite soil passivator

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Embodiment Construction

[0052] The present invention will be described in further detail below in conjunction with the examples, without limiting the present invention.

[0053] The composite soil passivator for reducing cadmium and lead content of the present invention is all according to: 5wt%~15wt% of decomposed chicken manure, 5wt%~15wt% of bran, 5wt%~15wt% of peat, 10%~20wt% of silicon calcium magnesium potassium fertilizer, It is prepared by mixing 5%-15wt% of talcum powder, 25wt%-35wt% of sepiolite, 10wt%-20wt% of accumulated fermented sugarcane filter mud and 1.5%-2.5% of microbial fermentation liquid.

[0054] But the embodiment is preferred: comprise decomposed chicken manure 10wt%, decomposed bran 10wt%, peat 8wt%, silicon calcium magnesium potassium fertilizer 15wt%, talcum powder 10wt%, sepiolite 30wt%, accumulation fermented sugarcane filter mud 15wt%, microorganism Fermentation broth 2wt%.

[0055] Preparation:

[0056] A. The dried chicken manure is crushed and passed through a 2mm ...

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Abstract

The invention discloses a composite soil passivator for reducing contents of cadmium and lead as well as a preparation method and an application method of the composite soil passivator. The composite soil passivator comprises the following components in percentage by weight: 5-15wt% of composted chicken manure, 5-15wt% of composted mixture of rice chaff and husk, 5-15wt% of turf, 10-20wt% of silicon-calcium-magnesium-potassium fertilizer, 5-15wt% of talcum powder, 25-35wt% of sepiolite, 10-20wt% of stacking fermented sugarcane filter mud and 1.5-2.5wt% of microbial fermentation liquor. The composite soil passivator can be widely applied to the mild and moderate cadmium/lead polluted rice fields to ensure that active cadmium and lead of the soil in the heavy metal polluted rice fields are respectively reduced by 51.5-51.6% and 52.6-58.8%, the cadmium and lead contents of the polished rice are respectively reduced by 48.8-51.6% and 52.7-56.0% and the pH value of the soil is improved by 0.97-1.04; and the composite soil passivator has the functions of restoring the acidized soil, improving the soil fertility and improving the physicochemical property of soil and has huge popularization and application values.

Description

technical field [0001] The invention belongs to the technical field of remediation of heavy metal polluted soil, and in particular relates to a composite soil passivator for reducing cadmium and lead content and a preparation and use method thereof. Background technique [0002] Soil is the main material basis for human survival. However, due to the increasing mining, smelting, processing, and commercial manufacturing activities of heavy metals, many heavy metals such as lead, cadmium, and mercury enter the atmosphere, water, and soil, causing serious environmental pollution. According to statistics, about 30,000 tons of cadmium is released into the environment every year in the world, and 82%-94% of the cadmium will enter the soil. According to relevant statistics, about 40% of the lead in the world is used to make batteries, 20% is added to gasoline as an anti-knock agent in the form of alkyl lead, 12% is used for building materials, 6% is used for the outer protective la...

Claims

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Application Information

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IPC IPC(8): C05G3/04C05G3/80
Inventor 单世平郭照辉张德元杜东霞刘前刚程伟黄军王玉双付祖姣伍善东
Owner 湖南润邦生物工程有限公司
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