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Method for remediating heavy metal contaminated soil through combination of carex nubigena and ciliate desert-grass

A technology for contaminated soil and composite remediation, applied in the field of environmental governance, can solve problems such as general enrichment capacity, and achieve the effect of high remediation efficiency and obvious effect.

Inactive Publication Date: 2017-03-08
YUNNAN CHIHONG ZINC & GERMANIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Centipede grass has a strong hyperaccumulation effect on arsenic in the soil, and also has a certain enrichment effect on heavy metals such as lead and cadmium, but the enrichment ability is average

Method used

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  • Method for remediating heavy metal contaminated soil through combination of carex nubigena and ciliate desert-grass
  • Method for remediating heavy metal contaminated soil through combination of carex nubigena and ciliate desert-grass
  • Method for remediating heavy metal contaminated soil through combination of carex nubigena and ciliate desert-grass

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Embodiment 1

[0020] The invention discloses a method for compounding heavy metal-contaminated soil with Carex sativa and Grass centipede. The method for repairing soil polluted with heavy metals with Carex sedge and Grass centipede comprises four processing steps of raising seedlings, interplanting, harvesting, and burning. Select mature spore plants from mature centipede grass plants as seeds; before sowing, mix spores and fine sand in a mass ratio of 1:20; evenly sow seedlings on a seedling tray equipped with matrix soil, and control the temperature in the seedling room The temperature is 23°C, the humidity is 50%, mix insecticides and fungicides into the seedling substrate soil before use, and cover it with a film to kill insects in an all-round way. Spray potassium dihydrogen phosphate solution on the leaves during the seedling cultivation stage; the seedlings of centipede grass grow to 10 Start ramets at 1 cm, and divide 3 seedlings in each substrate hole; in the area of ​​1350 meters ...

Embodiment 2

[0022] The invention discloses a method for compounding heavy metal-contaminated soil with Carex sativa and Grass centipede. The method for repairing soil polluted with heavy metals with Carex sedge and Grass centipede comprises four processing steps of raising seedlings, interplanting, harvesting, and burning. Select mature spore plants from mature centipede grass plants as seeds; before sowing, mix spores and fine sand in a mass ratio of 1:20; evenly sow seedlings on a seedling tray equipped with matrix soil, and control the temperature in the seedling room The temperature is 28°C, the humidity is 55%, mix insecticides and fungicides into the substrate soil for seedling cultivation before use, and cover it with a film to kill insects comprehensively, and spray potassium dihydrogen phosphate solution on the leaves during the seedling cultivation stage; the seedlings of centipede grass grow to 10 Start ramets at 1 cm, and 5 seedlings in each matrix hole; in the area of ​​1350 m...

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Abstract

The invention relates to a method for remediating heavy metal contaminated soil through combination of carex nubigena and ciliate desert-grass, and belongs to the technical field of environment protection plant remediation. The method for remediating heavy metal contaminated soil through combination of the carex nubigena and the ciliate desert-grass includes the four treatment steps of seedling culture, interplant, harvesting and incineration. Firstly, seedling culture of the ciliate desert-grass and collection of the carex nubigena are completed; then ciliate desert-grass seedlings growing to 40 cm are transplanted, the carex nubigena is transplanted between line spaces of the ciliate desert-grass, the carex nubigena and the ciliate desert-grass are cut 1-2 times every year, the carex nubigena and the ciliate desert-grass are reserved 3-8 cm on the ground during cutting for overwintering, and finally harvested carex nubigena and harvested ciliate desert-grass are both subjected to incineration in a metallurgical furnace for harmless treatment. The carex nubigena and the ciliate desert-grass are used for conducting combined remediation on the heavy metal contaminated soil due to the hyper-accumulation characteristic on lead, zinc, copper, cadmium and arsenic in the soil, the remediation effect is more obvious than that of a traditional soil remediation method, the method is clean and efficient, and the remediation cost is low.

Description

technical field [0001] The invention belongs to the technical field of environmental treatment, and in particular relates to a method for compositely repairing heavy metal-polluted soil with sedge grass and centipede grass. Background technique [0002] The heavy metal environmental pollution caused by smelting, processing and waste disposal has become more and more prominent to the society. Heavy metal pollution not only has an important impact on the harvest and quality of crops, but also has a certain impact on the quality of the atmosphere and water environment, and endangers human health through the food chain. Phytoremediation technology is to remove harmful heavy metals in soil or water through plant absorption, transport and accumulation. Plant-based phytoremediation is the process of enriching, decomposing and stabilizing toxic and harmful pollutants in the environmental medium by using the absorption and metabolic functions of plants. [0003] Centipede Grass is ...

Claims

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Application Information

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IPC IPC(8): B09C1/10
CPCB09C1/105
Inventor 王瑞山马雁鸿吴红林李国标杨艺行谢荣生雷德霖袁红欣李国勇李洪伟罗凌艳陈永革
Owner YUNNAN CHIHONG ZINC & GERMANIUM
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