Soil conditioner for passivating farmland heavy metals and preparation method thereof

A soil conditioner and heavy metal technology, applied in soil conditioning materials, chemical instruments and methods, agriculture, etc., can solve the problems of heavy metal ion re-release, passivation timeliness is not long enough, crop poisoning, etc., to achieve enhanced permeability, Promote the formation of soil aggregate structure and improve the effect of soil pH value

Inactive Publication Date: 2020-12-04
湖南晨露环保科技发展有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a soil conditioner and preparation method for passivating heavy metals in farmland, to solve the limitations of the commonly used conditioners proposed in the above background technology, such as long-term application of phosphorus-containing materials may induce water body eutrophication ; Due to the relatively high cost of minerals rich in iron and manganese oxides, there is also the risk of Fe and Mn poisoning crops; organic materials can reduce the effectiveness of heavy metals when they are first applied to the soil, but the passivation timeliness is not long enough. The mineralization and decomposition of organic matter may lead to the re-release of adsorbed heavy metal ions

Method used

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  • Soil conditioner for passivating farmland heavy metals and preparation method thereof
  • Soil conditioner for passivating farmland heavy metals and preparation method thereof
  • Soil conditioner for passivating farmland heavy metals and preparation method thereof

Examples

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Effect test

Embodiment 1

[0027] An embodiment of the soil conditioner for passivating farmland heavy metals of the present invention. The soil conditioner comprises the following components in mass percentage, 50% of quicklime; 30% of dolomite; 20% of calcium magnesium silicon fertilizer.

[0028] The raw quicklime is prepared by calcining and crushing limestone raw ore and passing through an 80-mesh sieve, wherein the mass percentage of CaO is ≥ 50%, and the raw material dolomite is prepared by calcining and crushing the raw dolomite raw ore and passing through an 80-mesh sieve.

[0029] Take the commercially available quicklime, dolomite, and calcium-magnesium-silicon fertilizer, and mix them uniformly according to the above-mentioned mass ratios to prepare the soil conditioner of this embodiment.

[0030] The pilot test of above-mentioned farmland soil conditioner is as follows:

[0031] From March to July 2018, a field pilot test was carried out in Changling'ao Village, Junchu Town, Liling City, ...

Embodiment 2

[0048] An embodiment of the soil conditioner for passivating farmland heavy metals of the present invention. The soil conditioner comprises the following components in mass percentage, 55% of quicklime; 30% of dolomite; and 15% of calcium-magnesium-silicon fertilizer. The used raw material of this soil conditioner and the preparation method of conditioner are all identical with embodiment 1

Embodiment 3

[0050] An embodiment of the soil conditioner for passivating farmland heavy metals of the present invention. The soil conditioner comprises the following components in mass percentage, 50% of quicklime; 35% of dolomite; and 15% of calcium magnesium silicon fertilizer. The used raw material of this soil conditioner and the preparation method of conditioner are all identical with embodiment 1

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Abstract

The invention relates to the technical field of farmland conservation and remediation, in particular to a soil conditioner for passivating farmland heavy metals and a preparation method thereof, and the soil conditioner comprises the following components in percentage by weight: 40-60% of quick lime, 10-40% of dolomite and 1-20% of calcium-magnesium-silicon fertilizer. The preparation method of the soil conditioner comprises the following step: uniformly mixing the quick lime, the dolomite and the calcium-magnesium-silicon fertilizer according to the proportion to obtain the soil conditioner.The conditioner is wide in raw material source, simple in preparation method, easy to implement, convenient to use and wide in application and promotion prospect, the product can reduce the bio-availability of heavy metal in soil from multiple angles, the pH value of the soil can be greatly increased, formation of a soil aggregate structure is promoted, the permeability of the soil is enhanced, the conditioner has the functions of repairing acidified soil, improving the soil tillage quality and the like, and the fertilizer is suitable for various soils with developed soil forming parent materials, and is a broad-spectrum multifunctional environment-friendly product.

Description

technical field [0001] The invention relates to the technical field of farmland conservation and restoration, in particular to a soil conditioner for passivating farmland heavy metals and a preparation method. Background technique [0002] With the increasing demand for social progress, the rapid development of smelting, mining, electroplating and other industries, the unreasonable discharge and treatment of waste water, waste gas, waste residue, industrial waste and domestic waste, etc. have caused the heavy metal content in the soil to be significantly higher than the background. value, and cause existing or potential soil quality degradation, ecological and environmental deterioration of heavy metal pollution is becoming more and more serious. Heavy metals in the soil can be absorbed and accumulated by crops and enter the food chain, posing a serious threat to human health. According to the 2014 "National Soil Pollution Survey Bulletin", the total excess rate of soil in ...

Claims

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Application Information

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IPC IPC(8): C09K17/06C05G3/80C09K101/00C09K109/00
CPCC09K17/06C09K2101/00C09K2109/00C05G3/80
Inventor 陈波君叶长城黄勇
Owner 湖南晨露环保科技发展有限公司
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