Method for restoring soil polluted by heavy metal cadmium by using mesquite

A cadmium-contaminated soil and heavy metal technology, applied in the field of soil pollution control, can solve the problems of affecting the growth and development of non-restorative plants, increasing the amount of leaching, secondary pollution of soil or water environment, etc.

Inactive Publication Date: 2010-07-21
ZHONGKAI UNIV OF AGRI & ENG +1
View PDF3 Cites 25 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, chelating agents such as EDTA are not easy to degrade in the environment, and their presence in the soil will seriously affect the growth and development of non-remediation plants; in addition, their solubilization and flow-enhancing effects on substances in the soil will lead to the degradation of target heavy metals and other non-target metals. After activation, it transfers to deep soil or groundwater, causing secondary

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for restoring soil polluted by heavy metal cadmium by using mesquite
  • Method for restoring soil polluted by heavy metal cadmium by using mesquite
  • Method for restoring soil polluted by heavy metal cadmium by using mesquite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] 1. Simulation of heavy metal polluted soil

[0019] Four experimental designs (CdNO 3 ) 2 Treatment group, (CdNO 3 ) 2 The concentrations in the soil were 5mg / kg, 25mg / kg, 50mg / kg and 100mg / kg respectively, and a control group with or without Cd was established.

[0020] Three EDTA treatment groups were designed in the experiment, the concentration of EDTA in the soil was 0.0mmol / kg, 0.2mmol / kg and 0.5mmol / kg respectively, and the concentration of EDTA added to the soil was 5mg / kg, 25mg / kg and 50mg / kg respectively. and 100mg / kg (CdNO 3 ) 2 In the treatment group, each treatment concentration of Cd was treated with 3 treatment concentrations of EDTA respectively, each treatment concentration was repeated 10-15 times, and a control group without EDTA was set at the same time.

[0021] See Table 1 for the treatment concentration of each reagent and its corresponding code.

[0022] Table 1 Cd(NO 3 ) 2 Comparison table of treatment concentration codes with EDTA

[...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a method for restoring soil polluted by heavy metal cadmium by using mesquite, comprising the following steps: 1) planting cassia alata plants on the soil polluted by the heavy metal cadmium; and 2) adding ethylenediamine tetraacetic acid into the soil as a fortifier while planting the cassia alata plants. The test results show that: the cassia alata has higher anti-cadmium ability and is suitable to be planted at cadmium polluted areas; while ethylenediamine tetraacetic acid can intensify the restoring function of the cassia alata, the more the amount of the ethylenediamine tetraacetic acid is added in the soil, the more cadmium is enriched within the cassia alata.

Description

technical field [0001] The invention relates to the field of soil pollution control, and more specifically, the invention relates to a method for repairing soil polluted by heavy metal cadmium by using leguminous shrubs. Background technique [0002] Soil is an important natural resource for the survival and development of human society. However, with the rapid development of industry and agriculture and the intensification of urbanization, the pollution of soil environment in my country is becoming more and more serious. Among them, soil heavy metal pollution is a hot issue of global concern. At present, the area of ​​cultivated land polluted by heavy metals in my country is nearly 2×10 7 m 2 , accounting for about 1 / 5 of the total arable land area, resulting in an annual grain production reduction of 1×10 7 Many tons, the food polluted by heavy metals reaches 1.2×10 every year 7 tons, the annual economic loss is at least 2×10 7 Yuan. Heavy metal elements are generally...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B09C1/00
Inventor 高丽霞郑志民卢炜峰陈铭杰
Owner ZHONGKAI UNIV OF AGRI & ENG
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap