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Passivator for restraining mercury pollution of vegetable soil

A technology of mercury pollution and passivation agent, which is applied in the field of agricultural soil mercury pollution control, can solve the problems of development without passivation agent, product development, etc., and achieve the effect of easy promotion, simple operation, and reduction of soil effective mercury content

Inactive Publication Date: 2012-10-03
JIMEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are a variety of passivators for soil heavy metal pollution control, such as passivators made of medical stone, diatomaceous earth, zeolite powder, fly ash, etc., they are all aimed at complex pollution of many heavy metals. Passivation treatment, but currently there is no passivator development and product development for the single pollution of vegetable garden soil mercury

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The invention relates to a passivating agent for suppressing mercury pollution in vegetable garden soil, and its component content by weight is as follows: 3 grams of hydroxyapatite, 5 grams of sodium alginate and 5 grams of calcium hydroxide.

Embodiment 2

[0016] The invention is a passivating agent for suppressing mercury pollution in vegetable garden soil, and its component content by weight is as follows: 15 grams of hydroxyapatite, 20 grams of sodium alginate and 20 grams of calcium hydroxide.

Embodiment 3

[0018] The invention is a passivating agent for suppressing mercury pollution in vegetable garden soil, and its component content by weight is as follows: 15 grams of hydroxyapatite, 20 grams of sodium alginate and 12.3 grams of calcium hydroxide.

[0019] 2. Preparation method

[0020] The preparation method of the passivator that the present invention suppresses vegetable garden soil mercury pollution is as follows:

[0021] Example 1

[0022] (1) Mix 15 grams of hydroxyapatite, 20 grams of sodium alginate and 12.3 grams of calcium hydroxide, stir well, and mix well to make a passivator for soil mercury pollution control.

[0023] (2) Add the prepared soil mercury deactivator to 1 kg of air-dried soil, stir well, and mix well.

[0024] Example 2

[0025] The difference from Example 1 is that the raw material ratio of the passivating agent is different (see Table 1), and the preparation method is the same as that of Example 1.

[0026] Table 1. The proportion of passivati...

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PUM

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Abstract

The invention discloses a passivator for restraining mercury pollution of vegetable soil, which comprises the following components in parts by weight: 3-15% of hydroxyapatite, 5-20% of algin and 5-20% of calcium hydroxide. By application of the soil mercury passivator which is mainly prepared from algin, hydroxyapatite and calcium hydroxide, the available mercury of vegetable soil of which the full mercury content is 0.5mg / kg is reduced by more than 50% within a 60-day culture period; and the passivator not only has the function of reducing and passivating mercury in soil, but also has the function of improving soil. The passivator is convenient to operate, low in cost, short in treatment period, capable of effectively reducing the available mercury content of soil and easy to popularize and hardly causes secondary pollution to soil environment.

Description

technical field [0001] The invention relates to the field of controlling agricultural soil mercury pollution, in particular to a passivator for suppressing vegetable garden soil mercury pollution. Background technique [0002] With the rapid development of industry and agriculture and the acceleration of urbanization, the soil environment is increasingly polluted by heavy metals. The agricultural land in our country, especially the vegetable planting soil in the suburbs, is facing more and more severe heavy metal pollution problems. When the heavy metal content in the soil accumulates to a certain level, it will lead to soil degradation, crop yield reduction and quality decline. If appropriate measures are not taken, it will be directly or indirectly accumulated in the human body through the food chain, endangering human health. At present, mercury pollution in agricultural soil in my country is quite serious, and the mercury content in soil in some areas far exceeds the lim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40C09K101/00
Inventor 黄志勇李剑
Owner JIMEI UNIV
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