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Method for remediating lead-cadmium compound contaminated soil by cooperating corn straw with sedum plumbizincicola intercropping energy plants

A technology of corn stalks and sedum with ore, which is applied in the restoration of polluted soil, botanical equipment and methods, and soil preparation methods, to achieve the effects of improving removal efficiency, improving water storage capacity, and improving safety and usability

Inactive Publication Date: 2020-04-17
宁土建工(苏州)环境修复科技有限公司
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0007] At present, there is no precedent in this field for the intercropping of corn stalks and Sedum sedum for energy phytoremediation of lead and cadmium compound polluted soil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] The present invention will be further described in detail below in conjunction with examples of implementation.

[0024] (1) Land selection and land preparation: Through the investigation of the soil environment quality of cultivated land in Yunnan Province, the site of this example is a cultivated land in Guanping Village, Jinding Town, Lanping County, Nujiang Prefecture, Yunnan Province, with an area of ​​about 50 m 2 , the total amount of cadmium in the cultivated land soil is 2.1 mg kg -1 , the total amount of lead is 87.6 mg kg -1 .

[0025] After the local corn is harvested, the entire above-ground part of the corn plant in the field is harvested, and after natural air-drying, the whole stalk is crushed with a grinder until the particle size is less than 20 mesh to obtain corn stalks.

[0026] The corn stalks are directly and evenly spread on the unplowed polluted land according to the proportion of 1%~2% of the polluted soil, and the selected plots are plowed,...

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Abstract

The invention relates to the technical field of phytoremediation of heavy metal compound contaminated soil, and discloses a method for remediating lead-cadmium compound contaminated soil by cooperating corn straw with sedum plumbizincicola intercropping energy plants, wherein the method comprises the following steps: corn straw is added into the lead-cadmium compound contaminated soil to obtain amatrix; sedum plumbizincicola and ricinus communis are intercropped in the middle of the matrix, and the application amount of the corn straw is 1%-2% of the mass of the lead-cadmium composite contaminated soil. According to the method, a method of utilizing the corn straw to cooperate with the sedum plumbizincicola intercropped with the ricinus communis to repair the lead-cadmium compound contaminated soil is a feasible repair mode; the content of pollutants in the lead-cadmium compound contaminated soil can be stably reduced, the yield of energy plants can be increased to a certain extent, it is guaranteed that farmers have certain economic benefits, and the actual requirement for 'simultaneous production and remediation' can be met.

Description

technical field [0001] The invention relates to the technical field of phytoremediation of heavy metal compound polluted soil, in particular to a method for phytoremediation of lead and cadmium compound polluted soil by using corn stalks in cooperation with Sedum sedum intercropping energy. Background technique [0002] At present, soil heavy metal pollution has become a global environmental problem. In recent years, farmland heavy metal pollution has posed a serious threat to the quality of agricultural products, the safety of the agricultural ecological environment, modern agriculture, and sustainable socio-economic development. Efficient, safe, and scientific restoration techniques and method systems can effectively curb agricultural environmental pollution and the growing trend of development. [0003] Among the many heavy metal-contaminated soil remediation methods, phytoremediation has shown its great advantages in remediation technology because of its low cost, no dam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/10B09C1/00A01B79/02A01G22/00A01G2/10
CPCA01B79/02A01G2/10A01G22/00B09C1/00B09C1/105Y02P60/20
Inventor 姚春霞毕德王青玲刘原彬
Owner 宁土建工(苏州)环境修复科技有限公司
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