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Method for safely utilizing and repairing lead-cadmium combined polluted soil

A compound pollution and soil technology, which is applied in the field of environmental pollution control, can solve the problems of no overall consideration of the impact, no research on the safe use of lead-contaminated soil and parallel remediation, and achieve the effect of reducing bioavailability, reducing lead and cadmium content, and overcoming pollution

Pending Publication Date: 2021-06-15
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the technologies and products for intercropping restoration and safe utilization of lead-contaminated soil do not take into account the impact of the two pollution sources of atmospheric dust and soil on plants; at the same time, there is no research on the safe utilization and lead pollution of wheat intercropping mode through mass planting of lead-contaminated soil. Soil remediation in parallel

Method used

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  • Method for safely utilizing and repairing lead-cadmium combined polluted soil
  • Method for safely utilizing and repairing lead-cadmium combined polluted soil
  • Method for safely utilizing and repairing lead-cadmium combined polluted soil

Examples

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preparation example Construction

[0043] The following Fe 3 o 4 For the preparation method of @C-COOH, please refer to the patent "A Magnetic Carboxylated Hollow Microsphere Soil Restoration Agent, Its Preparation Method and Application" (ZL201810251832.9);

[0044] The following Fe 3 o 4 @C-NH 2 For details of the preparation method, please refer to the patent "A Soil Restoration Agent for Magnetic Aminated Hollow Microspheres, Its Preparation Method and Application" (ZL201810251815.5).

Embodiment 1

[0046] A method for safely utilizing and repairing lead-cadmium composite polluted soil, comprising the steps of:

[0047] Indian mustard-winter wheat intercropping:

[0048] (1) Planting of winter wheat: In October, winter wheat was planted with equal row spacing on the lead-cadmium composite polluted soil, and the row spacing of winter wheat was 40 cm;

[0049] (2) Indian mustard seedling cultivation: after the Indian mustard seeds are processed, the seedlings are raised to a plant height of 7 cm in the greenhouse;

[0050] (3) Indian mustard transplanting: the Indian mustard seedlings are planted between the winter wheat rows in the period of turning green in March of the second year, the winter wheat row and the Indian mustard row spacing are 20cm, and the Indian mustard transplanting spacing is 15cm;

[0051] (4) Field management: water in time after intercropping Indian mustard, apply 300kg / ha of compound fertilizer simultaneously, and then carry out conventional wateri...

Embodiment 2

[0061] A method for safely utilizing and repairing lead-cadmium composite polluted soil, comprising the steps of:

[0062] Indian mustard-winter wheat intercropping:

[0063] (1) Planting of winter wheat: In October, winter wheat was planted with equal row spacing on the lead-cadmium composite polluted soil, and the row spacing of winter wheat was 42 cm;

[0064] (2) Indian mustard seedling cultivation: After the Indian mustard seeds are processed, the seedlings are raised to a plant height of 6 cm in the greenhouse;

[0065] (3) Indian mustard transplanting: the Indian mustard seedlings are planted between the winter wheat rows in March of the second year during the winter wheat turning green stage, the winter wheat row and the Indian mustard row spacing are 21cm, and the Indian mustard transplanting plant spacing is 13cm;

[0066] (4) Field management: water in time after intercropping Indian mustard, apply 300kg / ha of compound fertilizer simultaneously, and then carry out ...

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Abstract

The invention relates to the technical field of environmental pollution treatment, and especially relates to a method for safely utilizing and repairing lead-cadmium combined polluted soil. The method comprises the following steps: intercropping brassica juncea and wheat on the lead-cadmium combined polluted soil, and spraying an efficient lead-cadmium blocking agent from the jointing stage to the filling stage of the wheat. The lead and cadmium hyperaccumulator brassica juncea and the wheat are intercropped on the lead and cadmium combined polluted soil, and the absorption of the root system of the wheat to lead and cadmium in the soil is reduced by utilizing the hyperaccumulation capability of the brassica juncea to lead and cadmium in the soil; and meanwhile, the efficient lead-cadmium blocking agent is sprayed from the wheat jointing stage to the filling stage, absorption of lead and cadmium in atmospheric dust fall by wheat leaves and ears is reduced, migration of lead and cadmium in wheat tissues to wheat grains is reduced, and the purposes that the lead and cadmium in the wheat grains do not exceed the standard, the lead and cadmium content of the soil is gradually reduced, and lead and cadmium contaminated soil is repaired while production is conducted are achieved.

Description

technical field [0001] The invention belongs to the technical field of environmental pollution control, and in particular relates to a method for safely utilizing and repairing lead-cadmium composite polluted soil. Background technique [0002] The excessive rate of heavy metal points in cultivated land in China's main grain-producing areas is 21.49%, of which the proportion of severe pollution is as high as 5.02%. Lead is the second most polluted pollutant after cadmium, and poses a potential threat to agricultural ecosystems and human health. The soil-crop system is an important way and key interface for people exposed to heavy metals. Heavy metals in the soil are enriched in the edible parts of crops, and then enter the human body through the mouth, causing harm to people's health. The safe use and restoration of a large amount of lead-contaminated soil has become a difficult problem at present. The commonly used methods are: 1. Add organic matter, calcium oxide and other...

Claims

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Application Information

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IPC IPC(8): B09C1/10B09C1/08C09K17/40
CPCB09C1/08B09C1/105B09C2101/00C09K17/40C09K2101/00
Inventor 马闯刘福勇郁亚伟杨立敏解潘杨军李烜桢杨俊兴杜君胡华峰张宏忠赵继红
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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