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Broad spectrum heavy metal activity deactivator preparation method

A heavy metal passivator, heavy metal technology, applied in chemical instruments and methods, other chemical processes, organic fertilizers, etc., can solve the problems of lack of fixed passivation ability, small application scope, etc., to reduce health risks, wide application scope, Ease of promotion

Inactive Publication Date: 2015-04-08
ZHAOTONG CO LTD YUNNAN TOBACCO CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, no matter which of the above-mentioned substances is used alone, there are shortcomings of small application range or lack of fixed passivation ability.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A preparation method of broad-spectrum heavy metal active passivator, it comprises the following steps:

[0026] (A) Take peat rich in humic acid, decomposed compost or forest soil humus layer to remove grass roots, gravel and other impurities, and pass through a 0.5cm sieve for later use;

[0027] (B) Add 0.01 mol / L HCl or HNO to the above humic acid-rich material at a volume ratio of 1:1 3 Soak for 24 hours, fully stir twice during soaking, soak to remove fulvic acid and soluble simple organic matter in the material, this part of simple organic matter can reduce the effect of passivating agent, and can also reduce the content of impurities such as heavy metals;

[0028] (C) Filter the soaked material with a bamboo drying pad, wash it with water for 3 times, spread it out and air-dry it until the water content is less than 5%;

[0029] (D) Add 2% ZnSO% to the material obtained in step (C) in sequence 4 ·7H 2O, 10% sodium silicate and 0.10% sodium selenite, every tim...

Embodiment 2

[0032] A preparation method of broad-spectrum heavy metal active passivator, it comprises the following steps:

[0033] (A) Take peat rich in humic acid, decomposed compost or forest soil humus layer to remove impurities such as grass roots and gravel, and pass through a 1cm sieve for later use;

[0034] (B) Add 0.05 mol / L HCl or HNO to the above humic acid-rich material at a volume ratio of 1:1 3 Soak for 20 hours, fully stir 3 times during soaking, soak to remove fulvic acid and soluble simple organic matter in the material, this part of simple organic matter can reduce the effect of passivating agent, and can also reduce the content of impurities such as heavy metals;

[0035] (C) Filter the soaked material with a bamboo drying pad, wash it with water for 3 times, spread it out and air-dry it until the water content is less than 5%;

[0036] (D) Add 4% ZnSO% to the material obtained in step (C) in sequence 4 ·7H 2 O, 6% sodium silicate and 0.10% sodium selenite, every ti...

Embodiment 3

[0039] A preparation method of broad-spectrum heavy metal active passivator, it comprises the following steps:

[0040] (A) Take peat rich in humic acid, decomposed compost or forest soil humus layer to remove impurities such as grass roots and gravel, and pass through a 0.8cm sieve for later use;

[0041] (B) Add 0.03 mol / L HCl or HNO to the above humic acid-rich material at a volume ratio of 1:1 3 Soak for 22 hours, fully stir twice during soaking, soak to remove fulvic acid and soluble simple organic matter in the material, this part of simple organic matter can reduce the effect of passivating agent, and can also reduce the content of impurities such as heavy metals;

[0042] (C) Filter the soaked material with a bamboo drying pad, wash it with water for 3 times, spread it out and air-dry it until the water content is less than 5%;

[0043] (D) Add 3% ZnSO% to the material obtained in step (C) in sequence 4 ·7H 2 O, 8% sodium silicate and 0.075% sodium selenite, every t...

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PUM

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Abstract

The invention provides a broad spectrum heavy metal activity deactivator preparation method. The present invention relates to a soil conditioning agent preparation method, which comprises the following steps: (A) taking humic acid-rich peat, digest compost or a forest soil humus layer, and carrying out screening to provide a spare use; (B) adding the humic acid-rich material to HCl or HNO3 to soak, and stirring 2-3 times; (C) filtering the soaked material with a bamboo drying pad, washing 2-3 times with clear water, and carrying out air drying to a moisture content of less than 5%; (D) sequentially adding ZnSO4.7H2O, sodium silicate and sodium selenite to the material obtained from the step (C), carrying out aging on the mixed material for 2-3 days and uniformly mixing; and (E) adding limestone powder to the material obtained from the step (D), and completely and uniformly mixing to prepare the broad spectrum heavy metal deactivator. With the combination inhibitor prepared by the preparation method, activities of soil heavy metals can be significantly inactivated, the heavy metals can be inhibited from entering the food chain, and risks on human health by the heavy metals can be reduced.

Description

technical field [0001] The invention relates to a preparation method of a soil conditioner, in particular to a preparation method of a passivator for heavy metals in soil, specifically, a preparation method of a combined inhibitor of heavy metal mercury, cadmium, lead, arsenic and chromium . Background technique [0002] Environmental heavy metal pollution is a major environmental problem at home and abroad. Among heavy metals, mercury, cadmium, lead, arsenic, and chromium are the most harmful to human health and are often called "five poisonous elements". Heavy metal elements are absorbed by crops through the soil and accumulate and amplify through the food chain, which is the main way of causing harm. Industrial and agricultural production and human life activities cause heavy metals to enter the soil environment. Since the vast majority of heavy metals do not undergo microbial or chemical degradation in the soil environment, the heavy metals entering the soil can conti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/40A62D3/33A62D3/36C09K101/00C09K109/00A62D101/43
Inventor 查宏波魏世强付修廷黄韡王强赵芳木志坚倪霞张良君蒋珍茂
Owner ZHAOTONG CO LTD YUNNAN TOBACCO CO LTD
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