Method for intensively extracting and repairing cadmium and lead moderate-pollution farmland soil

A farmland, moderate technology, applied in the field of soil heavy metal pollution phytoremediation, can solve the problems of cadmium and lead pollution, soil heavy metal exceeding the standard, etc., and achieve the effect of improving the adsorption effect and improving the restoration effect.

Pending Publication Date: 2019-07-19
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the cadmium and lead pollution of large-scale farmland soil, there is currently no set of completely practical methods for remediation
[0004] Traditional remediation methods, such as plant avoidance remediation, can only temporarily solve the problem of agricultural product safety, and the fundamental problem of excessive heavy metals in the soil has not been solved

Method used

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  • Method for intensively extracting and repairing cadmium and lead moderate-pollution farmland soil
  • Method for intensively extracting and repairing cadmium and lead moderate-pollution farmland soil
  • Method for intensively extracting and repairing cadmium and lead moderate-pollution farmland soil

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Embodiment 1

[0034] A method for enhanced extraction and remediation of cadmium and lead moderately polluted farmland soil, the specific steps are as follows:

[0035] (1) Select a moderately cadmium-lead-contaminated farmland in Qujiang District, Quzhou City, Zhejiang Province as the moderately cadmium-lead-contaminated farmland soil to be repaired. The farmland soil was previously used as rice, and the heavy metal cadmium concentration in the soil was 0.55-0.91mg / kg , the average is 0.76mg / kg; the lead concentration is 123-147mg / kg, the average is 135mg / kg; the soil pH range is 5.0-5.8.

[0036] (2) In the first ten days of September 2017, the plots of farmland soils moderately polluted by cadmium and lead to be repaired (referred to as the repaired plots) were thoroughly weeded, base fertilizer applied, plowed, soil prepared and ridged;

[0037] Among them, the base fertilizer is the super-accumulative Sedum sedum enhanced base fertilizer, which is composed of distiller's grain organic ...

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Abstract

The invention discloses a method for intensively extracting and repairing cadmium and lead moderate-pollution farmland soil. The method comprises the following steps: weeding cadmium and lead moderate-pollution farmland soil, applying a base fertilizer, conducting ploughing, land preparing and ridging, and transplanting hyper-accumulation type sedum alfredii plants; spraying a reinforced repairingagent in a seedling stage and a rapid growth stage respectively; in April to May of a second year, removing the hyper-accumulation type sedum alfredii plants, and then sowing oil sunflower seeds; then, in June and July of a second year, spraying a reinforced repairing agent to oil sunflower; and after the oil sunflower is ripe, harvesting the oil sunflower plants. Through crop rotation of hyper-accumulation type sedum alfredii and oil sunflower and combination with spraying of the reinforced repairing agent, the defect that hyper-accumulation type sedum alpine is insufficient in heavy metal absorption capacity in deep soil is overcome, the adsorption effect of the hyper-accumulation type sedum alfredii and the oil sunflower on heavy metal cadmium and lead in the cadmium and lead moderate-pollution farmland soil is remarkably improved, and then the remediation effect of the cadmium and lead moderate-pollution farmland soil is improved.

Description

technical field [0001] The invention relates to the technical field of phytoremediation of soil heavy metal pollution, in particular to a method for enhanced extraction and remediation of cadmium and lead moderately polluted farmland soil. Background technique [0002] With the acceleration of my country's industrialization and agricultural modernization in recent decades, my country's environmental and ecological security has been under considerable pressure, and the problem of farmland soil pollution has become increasingly serious. Soil pollution, especially heavy metal pollution in farmland soil, has directly threatened the safety of agricultural products, which is related to the national economy and people's livelihood. Therefore, it is urgent to control farmland soil pollution. [0003] Among all the types of heavy metal pollution in farmland soil, cadmium-lead compound pollution has a wide range and high degree of harm, so it has received more attention. For the cadm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00
CPCB09C1/105
Inventor 杨肖娥王小子曹雪蕊阿芙辛·泽赫拉童文彬
Owner ZHEJIANG UNIV
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