Application of grain amaranth in repairing mine soil and sludge polluted by heavy metal cadmium

A kind of technology for grain amaranth and cadmium pollution, applied in the restoration of polluted soil, biological sludge treatment, etc., can solve the problems of insufficient plant species resources, achieve rapid natural reproduction and growth, strong wind diffusion ability, and reduce copper heavy metals The effect of content

Inactive Publication Date: 2010-03-17
SICHUAN AGRI UNIV +5
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention aims at the above-mentioned problem of insufficient resources of plant species that can be used for bioremediation of heavy metal pollution in soil, and provides the application of a new plant, grain amaranthus, in remediation of heavy metal cadmium pollution in mine soil and sludge

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The application of the grain amaranth of the present embodiment in repairing soil heavy metal cadmium pollution, the concrete way is:

[0019] By direct transplanting, under natural conditions, plant Amaranthus hypochondriacus L. in the soil polluted by heavy metals in the Xinkang Asbestos mining area, Shimian County, Sichuan Province; special management.

[0020] After 85 days, carry out stubble and harvest the aerial part of the plant, and record the weight percentage of heavy metal Cd wherein: 118.5mgkg -1 . The stubble part continues to grow and harvest, and such continuous extraction can effectively repair the heavy metal cadmium pollution in the soil.

Embodiment 2

[0022] The application of the grain amaranth of the present embodiment in repairing soil heavy metal cadmium pollution, the concrete way is:

[0023] Seed sowing under natural conditions was used to plant Amaranthus hypochondriacus L. in heavy metal-polluted soil in Fuquan lead-zinc mining area, Hanyuan County, Sichuan Province; special management.

[0024] After 3 months, carry out stubble to harvest the aboveground part of the plant, and measure the weight percentage of heavy metal Cd wherein: 127.5mg kg -1 . The stubble part continues to grow and harvest, and such continuous extraction can effectively repair the heavy metal cadmium pollution in the soil.

[0025] Visible by above-mentioned embodiment 1 and 2, the present invention utilizes planting grain amaranth in the heavy metal polluted soil, can obviously absorb the heavy metal Cd in the mine soil of pollution and sludge, thereby reach the mine soil and sludge heavy metal cadmium in effectively repairing soil purpos...

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PUM

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Abstract

The invention discloses application of grain amaranth in repairing mine soil and sludge polluted by heavy metal cadmium, wherein the grain amaranth only needs to be planted in the mine soil or the sludge polluted by heavy metal cadmium. By using the characteristic that the grain amaranth enriches the heavy metal cadmium, the grain amaranth is planted in the mine soil or the sludge to be capable ofabsorbing the accumulated heavy metal cadmium and transmitting the most of the heavy metal cadmium to overground part to achieve the aim of repairing the mine soil and the sludge which are polluted by the heavy metal cadmium. The grain amaranth does not need special management in the process of growing, therefore, the invention has the characteristics of less investment, low cost, strong operability, less disturbance to soil environment, permanent managing effect, not breaking site structure, not causing secondary pollution, wide application area, simple post processing, and the like; and thegrain amaranth has large individual biomass, can improve the effect for repairing the heavy metal in unit area, and provides a new plant resource variety for repairing the soil polluted by the heavymetal cadmium.

Description

technical field [0001] The invention relates to the technical field of remediation of heavy metal pollution in the environment, in particular to the application of plant grain amaranth in remediation of heavy metal cadmium pollution in mine soil and sludge. Background technique [0002] Heavy metal cadmium pollution in the environment has the characteristics of concealment, long-term and irreversibility. Its pollutants have poor mobility in the medium, long residence time, cannot be degraded by microorganisms, and can be transmitted through the food chain, which will eventually affect human health and cause immeasurable Impact. Cadmium is carcinogenic and induces prostate cancer and testicular tumors in animals. At present, cadmium has been classified as the first carcinogen by the International Agency for Research on Cancer. [0003] Phytoremediation using heavy metal-enriching plants or hyperaccumulators is one of the research hotspots in environmental science today. It ...

Claims

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Application Information

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IPC IPC(8): B09C1/00C02F11/02
Inventor 张世熔张小川徐小逊李婷贾永霞
Owner SICHUAN AGRI UNIV
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