Use of Debregeasia orientalis C. J. Chen in remediation of cadmium heavy metal contaminated soil

A technology for repairing soil and heavy metals, applied in the restoration of polluted soil, etc., can solve problems such as insufficient plant species resources, achieve the effects of reducing the spread of heavy metal pollution, vigorous vitality, and reducing soil erosion

Inactive Publication Date: 2011-09-07
SICHUAN AGRI UNIV +8
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Problems solved by technology

Therefore, the purpose of the present invention is to provide the application of water hemp in remediating soil heavy metal cadmium pollution for the above-mentioned problem of insufficient plant species resources that can be used for soil heavy metal pollution bioremediation

Method used

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  • Use of Debregeasia orientalis C. J. Chen in remediation of cadmium heavy metal contaminated soil
  • Use of Debregeasia orientalis C. J. Chen in remediation of cadmium heavy metal contaminated soil
  • Use of Debregeasia orientalis C. J. Chen in remediation of cadmium heavy metal contaminated soil

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Experimental program
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Embodiment 1

[0025] Embodiment 1 Pot concentration gradient test

[0026] The test site is located at the Soil and Fertilizer Experiment Station of the Teaching and Research Farm of Sichuan Agricultural University.

[0027] Using the method of potting to simulate heavy metal pollution in soil, water hemp ( Debregeasia orientalis C. J. Chen) seedlings were transplanted into potting soil polluted with gradient concentrations of heavy metal cadmium. The experiment started in May, and the water hemp seedlings were transplanted from the Shimian mining area of ​​Shimian County, Ya'an City, Sichuan Province, with 3 plants per pot and repeated 3 times. A total of 5 treatments were set up in the experiment, namely CK (without adding Cd) and 4 experiments with different dosage concentrations, and the dosage concentration was 5 mg kg -1 (T1), 30 mg kg -1 (T2), 60 mg kg -1 (T3) and 90 mg kg -1 (T4), the added heavy metal form is CdCl 2 2.5H 2 O, is an analytically pure reagent, which is adde...

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Abstract

The invention relates to a plant remediation technique for heavy metal contaminated soil and discloses the use of urticaceae plants in remediation of cadmium contaminated soil, in particular the use of Debregeasia orientalis C. J. Chen in remediation of cadmium heavy metal contaminated soil, which is to plant Debregeasia orientalis C. J. Chen in the heavy metal contaminated soil. Based on the cadmium enriching characteristic of Debregeasia orientalis C. J. Chen, the Debregeasia orientalis C. J. Chen is planted in the cadmium contaminated soil to absorb accumulated cadmium heavy metal and transfer most cadmium heavy metal to the parts above group, the parts above the group are harvested and ashed to extract heavy metal, and thus, the cadmium contaminated soil is remediated. In the growing process of the Debregeasia orientalis C. J. Chen, plant management is not required and stools can be left for growing braches, so the cost is low and the operability is high; meanwhile, new plant resource varieties are development for plant remediation of heavy metal contaminated soil, and new improvement and development space is provided for the deep development of the plant remediation technique.

Description

technical field [0001] The invention relates to the technical field of phytoremediation of heavy metal pollution in the environment, and specifically utilizes a [0002] Urticaceae plant water hemp, application of water hemp in remediation of heavy metal cadmium pollution in soil. Background technique [0003] Cadmium heavy metal 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. [0004] The use of heavy metal-enriched plants or hyperaccumulators for phytoremediation is one of the research hotspots in environmental science today. It has shown great potential in remediating heavy metal soil pollution. It has low investment, high efficiency, and no pollution. Secondary pollution and other characteristi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00B09C1/10
Inventor 张世熔穆彦彤陈强李婷徐小逊贾永霞李云龚国淑
Owner SICHUAN AGRI UNIV
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