Method and activating agent for restoring cadmium and/or lead contaminated soil through Hylotelephium erythrostictum and application

A technology for lead-contaminated soil and contaminated soil, applied in the field of environmental pollution control, can solve the problems of limited, slow, and long period of cadmium accumulation in Sedum sedum, achieve good remediation potential and prospects for popularization and application, rapid growth, Easily degradable effect

Pending Publication Date: 2018-04-06
INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, using Babao Sedum to remediate heavy metal-contaminated farmland is a slow process with a long cycle. Compared with hyperaccumulators such as Sedum sedum, the cadmium enrichment capacity of Babao Sedum is relatively limited.

Method used

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  • Method and activating agent for restoring cadmium and/or lead contaminated soil through Hylotelephium erythrostictum and application
  • Method and activating agent for restoring cadmium and/or lead contaminated soil through Hylotelephium erythrostictum and application
  • Method and activating agent for restoring cadmium and/or lead contaminated soil through Hylotelephium erythrostictum and application

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Embodiment 1

[0038] Using the method of field experiment, the site is set in moderately cadmium and lead polluted farmland soil near a smelter in Henan Province. The test is set up with 5 plots, the area of ​​each plot is 2.5m×4m, and the concentration of carboxyethyl chitosan is set at K-0 , K-10, K-20, K-50 and K-100 five gradients, namely 0, 10, 20, 50 and 100g / m 2 .

[0039] The transplanting time of Sedum sedum is April 25th. After transplanting into the soil, it should be watered moderately during the slowing down of seedlings to ensure that the soil is moist, but not waterlogged, so as to ensure the survival and rapid rooting of Sedum sedum. When Sedum babao grows to a plant height of 20-25cm, on May 17, carboxyethyl chitosan of different additions is added in 5 plots respectively, and the addition method is that described carboxyethyl chitosan After dissolving in water, add it to the polluted soil where Sedum sedum is planted. Each square meter needs 2L carboxyethyl chitosan solut...

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Abstract

The invention discloses a method and activating agent for restoring cadmium and/or lead contaminated soil through Hylotelephium erythrostictum and application of the activating agent. According to themethod, the Hylotelephium erythrostictum is planted on the cadmium and/or lead contaminated soil, and water-soluble carboxyethyl chitosan is applied into the contaminated soil to activate heavy metalcadmium and/or lead; and the Hylotelephium erythrostictum survives and grows, the overground part, absorbing the heavy metal cadmium and/or lead, of the Hylotelephium erythrostictum is reaped regularly, the heavy metal cadmium and lead in the soil can be effectively removed, and thus the restoring efficiency of the Hylotelephium erythrostictum to the cadmium and/or lead contaminated soil is greatly improved, wherein the activating agent is the water-soluble carboxyethyl chitosan. The method and the activating agent have the advantages that the restoring efficiency of the Hylotelephium erythrostictum is improved, the cost is low, operation is easy and convenient, biodegradability is achieved, and secondary pollution is avoided.

Description

technical field [0001] The invention belongs to the technical field of environmental pollution control, and relates to a phytoremediation technology polluted by heavy metals in soil, in particular to a method for remediating cadmium and / or lead polluted soil by Babao Sedum, an activator and an application thereof. Background technique [0002] Soil is the natural environment on which human beings depend and an important resource for agricultural production. The health of the soil environment is related to the quality of agricultural products and human health. In recent years, soil heavy metal pollution has become a serious environmental problem facing the world. At present, my country's farmland soil is seriously polluted by heavy metals. According to the results of the first national soil pollution survey, the rate of soil points exceeding the standard in my country's cultivated land is 19.4%, of which the proportions of slightly, lightly, moderately and heavily polluted po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00C09K17/32
CPCB09C1/105B09C2101/00C09K17/32
Inventor 杨军杨俊兴陈同斌黄俊郭俊梅
Owner INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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