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Method for remedying heavy metal Cu contaminated soil

A technology for polluting soil and remediating soil, which is applied in the field of soil remediation, can solve the problems of low bioavailability of heavy metals, and achieve the effects of improving remediation efficiency, promoting upward growth, and promoting growth and development

Inactive Publication Date: 2017-05-31
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in soil solution, there is still the problem of low bioavailability of most heavy metals

Method used

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  • Method for remedying heavy metal Cu contaminated soil
  • Method for remedying heavy metal Cu contaminated soil
  • Method for remedying heavy metal Cu contaminated soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1 Experimental method

[0026] 1.1 Plant cultivation

[0027] Lishihe used in this experiment was collected from the edge of the field in Yanshan Town, Guilin City, and was not polluted by heavy metals. After collection, the Lishihe plants were first washed repeatedly with tap water until the soil on the surface was washed clean, and then washed 3 times with ultra-pure water, and then filled with 1 / 2 strength of Lishihe in units of 20 to 30 plants. In the cylindrical glass bottle of the improved Hoagland nutrient solution (recipe shown in Table 1), black plastic bags are used around the glass bottle to avoid light to prevent the generation of algae from affecting the experimental results. Finally, the glass bottle containing Lishihe Arranged neatly in artificial climate box (LRH-500-GSI) for cultivation. By setting various parameters of the artificial climate box, the growth conditions of Lishihe were controlled. Add ultrapure water twice a day to supplement the wate...

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Abstract

The invention relates to the technical field of soil remediation, in particular to a method for remedying heavy metal Cu contaminated soil. Heavy metal Cu in the soil is removed in a plant remediation mode by adding a chelating agent EDTA and plant hormones IAA. Treatment with the IAA and the EDTA can remarkably prompt growth and development of plants, effectively relieve the stress effect of Cu in soil to the plants, and remarkably increase the Cu content of the overground parts of the plants, specifically, the Cu content is increased by 29.47% averagely compared with check treatment, and therefore, as exogenous additives, the IAA and the EDTA can effectively improve the efficiency of remediation of Leersia hexandra to the Cu contaminated soil.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to a method for phytoremediation of soil polluted by heavy metal Cu. Background technique [0002] Phytoremediation is a technology that utilizes the function of plants to remove, alleviate or fix difficult-to-degrade pollutants to purify polluted soil or water. Plant extraction is to use the exudates of plant roots to complex pollutants such as heavy metals in soil or water, and transfer them to the stems and leaves of plants. purpose of pollutants. The biomass of aboveground parts of plants and the content of heavy metals in aboveground parts are two key factors affecting the efficiency of phytoremediation. It has been reported that in the process of phytoremediation of heavy metal-contaminated soil, the pH of the soil can be adjusted or the temperature of the soil can be increased. Adsorption of heavy metals by plants. Applying nitrogen fertilizer to heavy metal-conta...

Claims

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Application Information

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IPC IPC(8): B09C1/00
CPCB09C1/105
Inventor 林华张学洪陈俊李海翔梁亮游少鸿
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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