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Residual and leaching risk evaluation technology of chelate-induced phytoremediation in heavy-metal contaminated soil

A technology for inducing plants and polluted soil, which is applied in the field of risk assessment of chelation-induced phytoremediation technology, and can solve the problems that there are no research reports on plant evaluation methods

Inactive Publication Date: 2013-02-13
NANJING AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no research report on the phytoevaluation method of the leaching risk of heavy metal polluted soil chelation-induced phytoremediation technology to deep soil.

Method used

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  • Residual and leaching risk evaluation technology of chelate-induced phytoremediation in heavy-metal contaminated soil
  • Residual and leaching risk evaluation technology of chelate-induced phytoremediation in heavy-metal contaminated soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Example 1: Experimental Design

[0009] One pot was stacked on top of the other to simulate different depths of soil, and each pot contained 1.0 kg of heavy metal-contaminated soil (air-dried weight). The total copper content of the test soil is 453mgkg -1 , After the soil is naturally air-dried, pass through a 2mm sieve. Take no plants and no plants with EDDS as control, and monocot ryegrass and dicotyledon Chrysanthemum chrysanthemum with EDDS and no EDDS as treatments. Experimental design see figure 1 .

[0010] The first season: plant Chrysanthemum chrysanthemum and ryegrass in upper pots, and apply EDDS treatment after the seedlings grow for 42 days. The amount of EDDS applied is 5mmol kg -1 . On the 3rd and 4th days after the EDDS treatment, 200ml deionized water (equivalent to 15mm precipitation) was used to simulate a large amount of precipitation and poured into the soil of the upper pot, and the lower pot was poured with the solution. The seedlings were...

Embodiment 2

[0013] Embodiment 2: Harvested plant measures relevant index

[0014] 1. The effect of applying EDDS treatment on the biomass of upper and lower potted plants

[0015] When the plants were harvested, the shoots and roots were separated, dried at 80°C, and the dry weight was measured. In the first season without EDDS treatment, the two plants could grow normally and did not show obvious symptoms of heavy metal toxicity. And 5mmol Kg -1 The EDDS treatment had obvious toxic effects on Chrysanthemum chrysanthemum. The dry weight of aboveground part of Chrysanthemum Chrysanthemum treated with EDDS decreased by 30% compared with the control (without EDDS), which was a significant difference. However, the same amount of EDDS had no obvious toxic effect on the upper part of the ryegrass. There was no significant difference in dry weight of ryegrass shoots treated with EDDS compared with the control. The shoot dry weight of the two plants treated with EDDS in the first season was ...

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Abstract

The invention belongs to the field of an evaluation technology of environmental pollution treatment, and relates to a leaching and residual risk evaluation technology of chelate-induced phytoremediation in heavy-metal contaminated soil. The technology provided by the invention is characterized by overlapping two pots up and down to simulate the soil at different depths, planting plants and analyzing the soil sample to precisely and conveniently evaluate a residual effect caused by using a chelating agent and the leaching risk on the soil on the lower layer. The design provided by the invention is capable of overcoming shortcomings of destructive sampling of traditional soil column experiments, conveniently simulating the soil on the deep layer to plant the plants and perform sample analysis. The invention provides a direct and reliable evaluation method for evaluating the residual effect of the chelating agent and the leaching risk in the chelate-induced phytoremediation process.

Description

technical field [0001] The invention belongs to the technical field of environmental pollution control assessment and relates to the risk assessment of chelation-induced phytoremediation technology. Background technique [0002] With the rapid development of industry and agriculture and the increase of population, the problem of soil heavy metal pollution has become increasingly prominent and has become a global problem. Phytoremediation technology has the advantages of low cost and environmental friendliness. It is considered a new technology with great development prospects and has attracted widespread attention from scientists from various countries. However, the disadvantage is that it takes a long time for restoration. Chelating agents can form soluble metal chelates by chelating with heavy metals in the soil, which can increase the availability and mobility of heavy metals, making them more easily absorbed by plants and transported to the shoots. Chelating agents are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00
Inventor 王桂萍杨丽罗春玲陈亚华夏妍沈振国
Owner NANJING AGRICULTURAL UNIVERSITY
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