Method for remediating arsenic polluted soil by interplanting hyperaccumulators and commercial crops

A technology of super-enrichment plants and economic crops, applied in the restoration of polluted soil, etc., can solve the problems of unfavorable farmland soil subsequent utilization, damage to the soil biological environment, low efficiency, etc., to avoid light competition, obvious environmental benefits, high The effect of economic benefits

Inactive Publication Date: 2018-10-16
INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods are inefficient and costly, and at the same time destroy the original biological environment of the soil, which is not conducive to the subsequent use of farmland soil

Method used

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  • Method for remediating arsenic polluted soil by interplanting hyperaccumulators and commercial crops
  • Method for remediating arsenic polluted soil by interplanting hyperaccumulators and commercial crops
  • Method for remediating arsenic polluted soil by interplanting hyperaccumulators and commercial crops

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Example 1: The effect of arsenic accumulation on centipede grass and citrus in the pot experiment

[0041] Two citrus varieties (Aiyuan 38, Daya orange) and a centipede plant were selected as the test plants, and the typical arsenic-contaminated soil in Shimen, Hunan was selected as the test soil. Divided into single-cropping centipede grass, single-cropping citrus (Aiyuan 38), single-cropping citrus (Daya tangerine), limited intercropping centipede grass-citrus (Aiyuan 38), limited intercropping centipede grass-citrus (Daya tangerine) , open intercropping centipede grass-citrus (Aiyuan No. 38) and open intercropping centipede grass-citrus (Daya mandarin), with five replicates for each treatment, a total of 35 pots.

[0042] Among them, as the root systems of two plants are not isolated in the open space, the two root systems are completely intersected, water, nutrients and mobile heavy metals can circulate freely, and interspecific underground competition and promotion...

Embodiment 2

[0043] Example 2: Arsenic accumulation effect of planting centipede grass and citrus in large field

[0044] Three citrus varieties (Aiyuan No. 38, Daya tangerine, and Shimen local citrus) and a centipede plant were selected as the test plants, and the arsenic-contaminated soil in Shimen, Hunan was selected as the test soil. Divided into single-cropping centipede grass, single-cropping citrus (Aiyuan No. 38), mono-cropping citrus (Daya tangerine), mono-cropping citrus (Shimen local citrus), intercropping centipede grass-citrus (Aiyuan No. 38), intercropping centipede grass- Seven treatments of citrus (Taya tangerine) and intercropping centipede grass-citrus (Shimen local citrus).

[0045] The upper part of the centipede meadow and citrus were harvested in mid-October, and the heavy metal content in the upper part of the centipede meadow and citrus whole fruit, orange peel and orange flesh was determined. From Figure 5 and Figure 7 As can be seen from the data of arsenic c...

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Abstract

The invention provides a method for remediating arsenic polluted soil by interplanting hyperaccumulators and commercial crops. In the arsenic polluted soil, the hyperaccumulators and the commercial crops are interplanted; the safe commercial crops are harvested by utilizing the low absorption capacity of the screened commercial crops on soil arsenic; meanwhile, by utilizing the enrichment capacityof the hyperaccumulators on the soil arsenic, the arsenic is enriched onto a plant shoot, and the mature plant (such as ciliate desert-grass) shoot is harvested and fed to an exclusive site so as tobe centrally and harmlessly treated, so that the aims of remediating and producing at the same time are achieved. The method for remediating the arsenic polluted soil by interplanting the hyperaccumulators and the commercial crops provided by the invention is reasonable in design, low in cost and high in operability, can be applied to the arsenic polluted soil, achieves the aims of remediating andproducing at the same time, has favorable economic benefit and social benefit, and has a broad application prospect.

Description

technical field [0001] The invention relates to the technical field of pollution control, in particular to a treatment method for arsenic-contaminated soil—phytoremediation. Background technique [0002] Soil is the natural environment on which human beings depend and an important resource for agricultural production. With the development of science and technology and social progress, as well as large-scale human activities since industrialization, the discharge of heavy metal pollutants is increasing day by day. Heavy metal pollution will seriously interfere with the normal function of the soil ecosystem, which not only reduces the yield and quality of agricultural products, but also indirectly endangers human health through the food chain cycle. According to the "National Soil Pollution Survey Bulletin", the rate of soil arsenic points exceeding the standard reached 2.7%. At present, how to solve the problem of arsenic-contaminated farmland soil and the restoration of con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/10
CPCB09C1/105
Inventor 杨军郭悦杨俊兴陈同斌
Owner INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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