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Solidifying agent for stabilizing heavy metal Cd in soil and using method thereof

A heavy metal and curing agent technology, applied in the field of environmental engineering, can solve the problems of accelerated leaching of heavy metal ions, environmental risks, and large amount of curing agent added, and achieve the effect of easy operation and low preparation cost

Inactive Publication Date: 2017-02-15
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention: In view of the fact that the amount of curing agent added in the current curing stabilization method is too large, the cracking of the cured body caused by long-term stress load and dry-wet cycle will accelerate the leaching of heavy metal ions in the cured body and high environmental risk problem, the present invention provides a solidifying agent for stabilizing heavy metal Cd in the soil and its use method. The present invention first ferments and extracts beneficial ingredients from the parts of natural plants that have an attractive effect on heavy metals, and then uses carbonized bamboo particles as The carrier is used to absorb the fermentation extract, and finally mix it with diatomaceous earth and other substances, and use it to prepare a solidifying agent for stabilizing the heavy metal Cd in the soil and its use method. The solidified Cd metal in the present invention is stable and does not seep out, while harmless to the environment

Method used

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Examples

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preparation example Construction

[0019] The preparation method of the microbial granules is as follows: in parts by weight, take 30 to 35 parts of celery root, 28 to 30 parts of celery root and 42 to 45 parts of pure water, put them into a juice extractor to squeeze the juice, collect and squeeze Juice, according to the mass ratio of 5:2:1, take the squeezed juice, peptone and agar, stir evenly, put it into a fermenter, then add dry yeast with a mass ratio of 4-6% of the squeezed juice, set the temperature at 29-34°C, Stir and ferment at 120r / min for 32-35h; after the above fermentation, put the fermentation mixture in the fermenter into a centrifuge, centrifuge at 5000r / min for 8-12min, collect the supernatant, and use a mass fraction of 7% Phosphoric acid solution adjusts the pH to 6.0-6.2 to obtain microbial bacterial liquid, which is used for later use; according to the solid-liquid ratio of 1:3, take fresh bamboo tubes and a hydrogen peroxide solution with a mass fraction of 25% and put them in a water ba...

example 1

[0022] A curing agent for stabilizing heavy metal Cd in soil and its use method, characterized in that: in parts by weight, the curing agent for stabilizing heavy metal Cd in soil consists of the following four components: 53 parts of microbial particles, 32 parts of silicon Algae earth, 19 parts of slate and 16 parts of plant ash.

[0023] The preparation method of the described microbial granules is as follows: in parts by weight, take 30 parts of celery root, 28 parts of celery root and 45 parts of pure water, put them into a juice extractor to squeeze the juice, collect the squeezed juice, and press the mass ratio of 5 : 2: 1, take the squeezed juice, peptone and agar, stir evenly, put into the fermenter, then add dry yeast with 4% of the squeezed juice quality, set the temperature at 29°C, stir and ferment at 120r / min for 32h; After the fermentation is finished, put the fermentation mixture in the fermenter into a centrifuge, centrifuge at 5000r / min for 8min, collect the ...

example 2

[0027] A curing agent for stabilizing heavy metal Cd in soil and its use method, characterized in that: in parts by weight, the curing agent for stabilizing heavy metal Cd in soil consists of the following four components: 56 parts of microbial particles, 26 parts of silicon Algae earth, 18 parts of slate and 12 parts of plant ash.

[0028]The preparation method of the described microbial granules is as follows: in parts by weight, take 35 parts of celery root, 28 parts of celery root and 42 parts of pure water, put them into a juice extractor and squeeze the juice, collect the squeezed juice, and press the mass ratio of 5 : 2: 1, get the squeezed juice, peptone and agar, stir evenly, put into the fermentation tank, then add dry yeast with 6% of the squeezed juice quality, set the temperature at 34°C, stir and ferment at 120r / min for 35h; After the fermentation is finished, put the fermentation mixture in the fermenter into a centrifuge, centrifuge at 5000r / min for 12min, coll...

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Abstract

The invention relates to a solidifying agent for stabilizing heavy metal Cd in soil and a using method thereof, and belongs to the technical field of environmental engineering. The solidifying agent for stabilizing the heavy metal Cd in the soil and the using method thereof are provided for aiming at the problems that according to solidification stabilization methods in the prior art, the amount of a solidifying agent is too large, cracking of a solidified body may be caused due to the effect of a long-term stress load and wet and dry cycle to accelerate leaching of heavy metal ions in the solid, and the environmental risk is high. First, a natural plant part with heavy metal attraction effect is fermented for extraction of useful components, then carbonized bamboo particles is used as a carrier for adsorption of fermentation extract, finally, the fermentation extract is mixed with diatomite and other materials for preparation of the solidifying agent for stabilizing the heavy metal Cd in the soil for use. The solidifying agent is stable in Cd metal solidification, may not seep out, and has no harm to the environment.

Description

technical field [0001] The invention relates to a solidifying agent for stabilizing heavy metal Cd in soil and a using method thereof, belonging to the technical field of environmental engineering. Background technique [0002] At present, heavy metal pollution has a great impact on people's quality of life and physical health, seriously damages public health, endangers environmental safety, and affects social stability. Heavy metal pollution has the characteristics of long-term, cumulative, latent and irreversible. It is harmful, difficult to control, and high in cost. In particular, the risk of ecotoxicity induced by heavy metals has attracted more and more attention, especially those related to food production. Soil heavy metal pollution has received widespread attention. [0003] At present, the main treatment method of heavy metal pollution is to reduce the toxicity of waste residue through chemical reaction, and then carry out subsequent treatment. However, on the on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40B09C1/10
CPCC09K17/40B09C1/10B09C2101/00
Inventor 赵远孙辰鹏孙向武杨泽平陈江杰殷鸿洋顾健谢寅徐腾陶利华聂莉陈婷宋瑜
Owner CHANGZHOU UNIV
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