An intensifier for remediating soil heavy metal pollution by moso bamboo

A technology for remediating soil and heavy metals, applied in the field of soil pollution remediation, can solve problems such as secondary pollution, heavy metal migration, difficult biodegradation, etc., and achieve the effects of reducing damage, improving acidity and alkalinity, and pollution-free environment

Active Publication Date: 2018-05-25
ZHEJIANG FORESTRY UNIVERSITY
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Problems solved by technology

The currently widely used enhancers are mainly synthetic chemical substances such as ethylenediaminetetraacetic acid (EDTA), diethylenetriaminepentaacetic acid (DTPA), cyclohexanediaminetetraacetic acid (CDTA), etc. Although the effect of promoting heavy metal absorption by plants in the soil is obvious, its biggest disadvantage is that it is easy to cause secondary pollution. The activated heavy metals are easy to migrate to the surrounding and groundwater, and it is difficult to be biodegraded in the environment.

Method used

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Embodiment Construction

[0021] The principle of the invention is as follows. The results of previous sand culture experiments show that under the stress of heavy metals, the root system of moso bamboo has a strong activation effect on insoluble heavy metals. The concentrations of insoluble heavy metals in sand culture are: lead carbonate 516mg / kg, zinc carbonate 673mg / kg, basic copper carbonate 173mg / kg, cadmium carbonate 16mg / kg. After planting moso bamboo seedlings, compared with the control of planting seedlings, the soluble Pb, Zn, Cu, and Cd in the sand culture increased by 6.6%, 34.7%, 82.5%, and 67.0%, respectively, and the heavy metal contents in the moso bamboo seedlings could respectively reach 474.2mg / kg, 2109.9mg / kg, 368.4mg / kg, 320.7mg / kg. The results showed that moso bamboo has a strong absorption and activation ability for four heavy metals, which mainly rely on root secretion, and organic acid is the most important component in the secretion. The composition analysis of the pollutant...

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Abstract

The invention provides a strengthening agent for remediating heavy metal pollution in moso bamboo soil, the composition of the strengthening agent for remediating heavy metal pollution in moso bamboo soil is composed of organic acids, and the total concentration of organic acids added to soil polluted by heavy metals is 10mmol / kg ; The proportioning ratio of organic acids for the soil polluted by different heavy metals is as follows: heavy metal lead polluted soil: it consists of 87 parts of oxalic acid and 13 parts of malic acid; heavy metal zinc polluted soil: it consists of 75.7 parts of oxalic acid and 24.3 parts of malic acid Heavy metal copper polluted soil: its composition is 64 parts of oxalic acid, 20 parts of malic acid, 16 parts of lactic acid; Heavy metal cadmium polluted soil: its composition is 58 parts of oxalic acid, 29 parts of malic acid, 13 parts of lactic acid; .

Description

technical field [0001] The invention relates to the technical field of soil pollution remediation, in particular to an enhancer for moso bamboo remediation of soil heavy metal pollution. Background technique [0002] my country's heavy metal-contaminated soil exceeds 300 million mu, and the number of grains, vegetables and agricultural by-products polluted by heavy metals has increased sharply. The heavy metal-contaminated soil remediation technology mainly includes physical technologies such as soil replacement and isolation method, chemical technology of solidification and leaching, and phytoremediation technology. Phytoremediation technology is considered to be the most promising technology because of its low cost and environmental friendliness. However, in the land restoration market, it has always been regarded as an immature practical technology and has not been favored. The reason is that although hyperaccumulator plants have extraordinary enrichment capabilities th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/00C09K17/14C09K109/00
Inventor 柳丹李继光陈俊任刘晨
Owner ZHEJIANG FORESTRY UNIVERSITY
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