Method for remediating lead-cadmium combined polluted soil

A technology for cadmium-contaminated soil and compound pollution, which is applied to the restoration of polluted soil and other directions, can solve the problems of not considering lead pollution, low efficiency, poor stabilization effect of stabilizer on cadmium, etc., and achieves the promotion of lead stabilization and a simple restoration method. , good repair effect

Active Publication Date: 2017-03-15
HENAN UNIVERSITY OF TECHNOLOGY
View PDF3 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(2) Affect the types and quantities of soil microorganisms; (3) Soil lead and cadmium enter the human body through the food chain, breathing and other ways, affecting the health of local residents
(4) High content of heavy metals in the soil can enter the water body through surface runoff and other channels, affecting the quality of the water body and the health of aquatic organisms
Although the existing method of phytoremediation can reduce the cadmium content in the soi

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] The present invention will be described in more detail below through specific examples.

[0022] The lead and cadmium complex polluted soil area formed by lead smelting in a certain place in Henan Province was selected as the project area. The land area of ​​the project area is 500 m 2 (Width 10m, length 50m). The test started in October 2015, and the total lead and cadmium contents in the 0-20 cm soil in the project area were determined to be 185 and 2.10 mg / kg, respectively.

[0023] 1. Divide the project area into 10 plots, the length of the plots is the width of the project area, that is, 10 m; the width of the plots is 4 m, and a protection line with a width of 1 m is left between every two plots, that is, the area of ​​each plot is 40 m 2 . Five of the above 10 plots were used as treatment plots, and the other 5 were used as control plots. The 10 plots are completely randomly arranged in the project area.

[0024] 2. Calculation of sodium chloride dosage: 5×4...

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 remediating lead-cadmium combined polluted soil. The method is characterized in that sodium chloride is applied to the lead-cadmium polluted soil, and then sedum plumbizincicola is planted to extract cadmium from the soil, so as to achieve the purpose of reducing the content of chloride in the soil; after the sedum plumbizincicola is harvested, water soluble phosphate is applied to the soil, so as to reduce the effectiveness of lead in the soil. The method has the advantages that the remediation is simple and easy to master; the chloride is extracted through plant, and lead is stabilized through phosphate, so that the remediation effect is far more than that of an existing method; chlorine applied to the lead-cadmium combined polluted soil can improve the extraction of the sedum plumbizincicola to cadmium in the soil, and the stability of lead in the soil can be improved through phosphate.

Description

technical field [0001] The invention relates to a contaminated soil remediation technology, in particular to a method for remediating lead and cadmium compound polluted soil by combining water-soluble phosphate, sodium chloride and sedum sedum. Background technique [0002] Lead and cadmium are common polluting heavy metals in soil. The main sources of these polluting heavy metals include mining and smelting of non-ferrous metals and the use of leaded gasoline. In addition, lead and cadmium compound polluted soil is also very common. This kind of polluted soil mainly exists around non-ferrous metal mining or smelting enterprises. For example, the mining and smelting of zinc, copper, lead and other metals can cause soil lead and cadmium pollution. In unpolluted soil, the content of cadmium is generally about 0.1 mg / kg, the content of lead is between 15-35 mg / kg, and the content of lead in the soil near non-ferrous metal smelting enterprises often reaches 100-1000 mg / kg , th...

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): B09C1/10
CPCB09C1/105B09C2101/00
Inventor 邢维芹李立平刘辉曹恩泽赵强
Owner HENAN UNIVERSITY OF TECHNOLOGY
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