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Remediation method for soil contaminated by heavy metal

A technology of polluted soil and remediation method, applied in the restoration of polluted soil, etc., can solve the problems of difficult to dispose of harvested plants containing pollutants, long repair time, seasonality, etc., and achieve the effect of high phytoremediation efficiency

Inactive Publication Date: 2014-01-01
FARMLAND IRRIGATION RES INST CHINESE ACAD OF AGRI SCI
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Problems solved by technology

Although phytoremediation has the above-mentioned advantages, however, phytoremediation also has some disadvantages, such as: the repair time is ...

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  • Remediation method for soil contaminated by heavy metal
  • Remediation method for soil contaminated by heavy metal
  • Remediation method for soil contaminated by heavy metal

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Embodiment Construction

[0013] The mechanism that the present invention improves phytoremediation efficiency is that CO 2 It is not only the reaction substrate of photosynthesis, but also the atmospheric CO 2 Concentration is one of the limiting factors for photosynthesis of C3 plants, and there are also conditions in plants to adapt to high concentrations of CO 2 The basis of biochemistry and molecular biology, there is the use of high concentrations of CO 2 Mechanism possibility, atmospheric CO 2 An increase in concentration will inevitably lead to an increase in the photosynthesis of plants, especially C3 plants. The strengthening of plant photosynthesis directly leads to the accumulation of organic compounds in plants and the increase of plant biomass.

[0014] Due to the large biomass of field crops, crops that can be used as biomass energy such as rice, corn, rapeseed, cotton, and hemp have become the first choice for phytoremediation of heavy metal-contaminated soil. Rice is one of the mos...

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Abstract

The invention discloses a remediation method for soil contaminated by heavy metal. Paddy rice is planted in soil contaminated by both cadmium and copper, a carbon dioxide fertilizer is applied to enable the carbon dioxide concentration of local atmosphere to rise, the condition for increasing the carbon dioxide concentration is open-top phytotron, carbon dioxide rises to 860+/-50 [mu] l l<-1>, the paddy rice is Rongyou 398, Shanyou 428, Yueza 889, Tianyou 390, Guinongzhan or Yinjingruanzhan. The remediation method has the remarkable advantage that the plant remediation efficiency is high.

Description

[0001] Technical field: [0002] The invention relates to a method for treating soil pollution, in particular to a method for repairing heavy metal polluted soil. Background technique: [0003] Due to the intensification of industrial pollution and the increase in the types and quantities of farmland chemical substances, soil heavy metal pollution is becoming more and more serious. Among them, 30% of the farmland is polluted by heavy metals (partition, mercury, lead, copper) to varying degrees, resulting in tens of millions of tons of grain. production cuts. Heavy metals are hidden, hysteresis, accumulative, irreversible, insoluble and harmful in soil. It not only endangers the growth and development of plants, but also threatens ecological security, affects the quality of agricultural products, and endangers human health and life through the food chain. [0004] Conventional methods currently used to treat heavy metal-contaminated soils include physical methods, chemical...

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Application Information

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IPC IPC(8): B09C1/00
Inventor 李中阳齐学斌樊向阳宋正国朱东海杜臻杰
Owner FARMLAND IRRIGATION RES INST CHINESE ACAD OF AGRI SCI
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