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Heavy-metal passivator produced by using matrix and preparation method for heavy-metal passivator

A heavy metal passivator and substrate technology, applied in the field of contaminated soil remediation, can solve problems such as secondary pollution, soil fertility destruction, soil microorganisms or plant growth inhibition, and achieve the effects of small soil disturbance, improved adsorption performance, and simple processing

Inactive Publication Date: 2019-11-01
南京迪天高新产业技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, there is no lack of research on heavy metal passivators for repairing agricultural land polluted soil, and various heavy metal passivators have also appeared on the market. However, most of the passivators in the prior art are chemically synthesized passivators. Use, it changes the original soil structure to a certain extent, causing damage to the original soil fertility, inhibiting soil microorganisms or plant growth, and there are also problems such as secondary pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A kind of heavy metal passivating agent that utilizes substrate to produce, comprises the component of following parts by weight:

[0032] 35 parts of activated sludge biochar, 35 parts of kitchen waste humic acid, 10 parts of waste brewer's yeast, 5 parts of Bacillus, 5 parts of reduced iron, 25 parts of modified montmorillonite, and 25 parts of modified diatomite.

[0033] The passivating agent has a three-layer coating structure, wherein the inner core of the innermost layer is waste brewer's yeast, bacillus and reduced iron, the inner core is covered with an intermediate layer, and the intermediate layer is modified montmorillonite, The middle layer is covered with an outer layer, and the outer layer is activated sludge biochar, kitchen waste humic acid, and modified diatomaceous earth.

[0034] Preferably, the activated sludge biochar is prepared by the following method: putting the air-dried sludge into a muffle furnace, calcining at 300° C. for 5 hours, and cooli...

Embodiment 2

[0045] A heavy metal passivator produced by using a substrate, comprising the following components by weight: 40 parts of activated sludge biochar, 40 parts of kitchen waste humic acid, 10 parts of waste brewer's yeast, 10 parts of Bacillus, and 6 parts of reduced iron parts, 30 parts of modified montmorillonite, and 30 parts of modified diatomite.

[0046] Preferably, the passivating agent has a three-layer coating structure, wherein the inner core of the innermost layer is waste brewer's yeast, bacillus and reduced iron, and the inner core is covered with an intermediate layer, and the intermediate layer is a modified Mongolian Soil removal, the middle layer is covered with an outer layer, and the outer layer is activated sludge biochar, kitchen waste humic acid, and modified diatomite.

[0047] The activated sludge biochar is prepared by the following method: the air-dried sludge is put into a muffle furnace, calcined at 300° C. for 8 hours, and the activated sludge biochar...

Embodiment 3

[0064] A heavy metal passivator produced by using a substrate, comprising the following components by weight: 35 parts of activated sludge biochar, 35 parts of kitchen waste humic acid, 8 parts of waste brewer's yeast, 8 parts of Bacillus, and 5 parts of reduced iron 25 parts of modified attapulgite, 25 parts of modified montmorillonite, and 25 parts of modified diatomite.

[0065] Preferably, the passivating agent has a three-layer coating structure, wherein the inner core of the innermost layer is waste brewer's yeast, bacillus and reduced iron, and the inner core is covered with an intermediate layer, and the intermediate layer is modified concave-convex. Sticks and modified montmorillonite, the middle layer is covered with an outer layer, and the outer layer is activated sludge biochar, kitchen waste humic acid, and modified diatomite.

[0066] The activated sludge biochar is prepared by the following method: the air-dried sludge is put into a muffle furnace, calcined at 3...

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Abstract

The invention belongs to the technical field of remediation of contaminated soil and particularly relates to a heavy-metal passivator produced by using a matrix. The heavy-metal passivator comprises the following ingredients in parts by weight: 30-40 parts of activated sludge biochar, 30-40 parts of kitchen waste humic acid, 5-10 parts of waste brewer's yeast, 5-10 parts of bacilli, 3-6 parts of reduced iron, 20-30 parts of modified attapulgite, 20-30 parts of modified montmorillonite and 20-30 parts of modified diatomite. The multielement efficient heavy-metal passivator is compounded by using a chemical modified passivator and a modified natural passivator, is applicable to compounded stabilization of a variety of heavy metals, is used for remedying heavy-metal contaminated lands into fertile farmlands and has a relatively high real value and a broad application prospect.

Description

technical field [0001] The invention belongs to the technical field of contaminated soil remediation, and in particular relates to a heavy metal passivator produced by using a substrate and a preparation method thereof. Background technique [0002] The survey bulletin issued by the Ministry of Environmental Protection and the Ministry of Land and Resources shows that the overall situation of soil environment in my country is not optimistic, with heavy soil pollution in some areas, worrisome soil environmental quality of cultivated land, and prominent soil environmental problems in industrial and mining wasteland. Due to the complexity of formation, long-term accumulation, concealment of occurrence, slow effect of toxicity, particularity of diagnosis and long-term recovery of heavy metal pollution in farmland, heavy metal pollution has become an "invisible killer" of human health. On the whole, the composite pollution of various heavy metal elements, mainly cadmium-copper, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/22C09K101/00
CPCC09K3/22C09K2101/00
Inventor 郑伟张慧汪一潭
Owner 南京迪天高新产业技术研究院有限公司
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