Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for restoring cadmium-polychlorinated biphenyl composite polluted soil by utilizing rotation of astragalus sinicus and sedum plumbizincicola

A composite pollution and polychlorinated biphenyl technology, which is applied in the restoration of polluted soil and other directions, can solve the problems of restoration resources and restoration time waste, and achieve the effect of reducing restoration costs and improving utilization efficiency.

Pending Publication Date: 2022-03-04
BEIJING UNIV OF TECH
View PDF13 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the uneven distribution of cadmium in farmland soil, adopting a unified restoration method will cause waste of restoration resources and restoration time

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 cadmium-polychlorinated biphenyl composite polluted soil by utilizing rotation of astragalus sinicus and sedum plumbizincicola
  • Method for restoring cadmium-polychlorinated biphenyl composite polluted soil by utilizing rotation of astragalus sinicus and sedum plumbizincicola
  • Method for restoring cadmium-polychlorinated biphenyl composite polluted soil by utilizing rotation of astragalus sinicus and sedum plumbizincicola

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0033] The method of repairing cadmium-polychlorinated biphenyl composite polluted soil by using milk vetch and sedum sedum in crop rotation in the surrounding polluted farmland soil of an electrical appliance dismantling site in Taizhou City, Zhejiang Province was carried out.

[0034] The polluted farmland was originally a paddy field with an area of ​​600m 3 , the soil pH range is 5.8-6.9, the cadmium content is 0.7-2.8mg / kg, and the PCB content is 80-160μg / kg. The test will start in November 2019, including the following steps:

[0035] Plowing and leveling the cadmium-polychlorinated biphenyl compound polluted farmland;

[0036] Plant milk vetch by hole sowing, the planting spacing is 20cm, and the row spacing is 25cm;

[0037] During the growth of milk vetch, apply 9kg of compound fertilizer and 300kg of organic fertilizer;

[0038] In April 2020, harvest milk vetch; according to figure 1 6 sampling points were selected to collect milk vetch rhizosphere soil and non-r...

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 cadmium-polychlorinated biphenyl compound polluted soil by utilizing rotation of astragalus sinicus and sedum plumbizincicola, which comprises the following steps of: ploughing and flattening a polluted farmland, planting the astragalus sinicus in winter for restoring polychlorinated biphenyl in the farmland, and returning the astragalus sinicus as green manure after the astragalus sinicus is harvested to the field; before the second crop of plants are planted, the polluted farmland is divided into a plurality of remediation grids, the total cadmium concentration value and the remediation mode in each remediation grid are determined, and precise remediation of cadmium in the polluted farmland through the sedum plumbizincicola is achieved. The invention provides a mode of crop rotation of astragalus sinicus and sedum plumbizincicola for repairing the compound pollutants in the farmland, and mainly adopts the mode of repairing polychlorinated biphenyl by astragalus sinicus, taking astragalus sinicus as green manure of succeeding plants and accurately repairing cadmium in a gridding manner, so that the repairing cost and the repairing time are greatly reduced; the remediation efficiency of the cadmium-polychlorinated biphenyl specific combined pollution farmland soil is obviously improved.

Description

technical field [0001] The invention relates to the field of remediation of heavy metal-organic pollutant polluted soil, in particular to a method for remediating cadmium-polychlorinated biphenyl compound polluted soil by using milk vetch and sedum sedum in rotation. Background technique [0002] During the recycling, storage, and dismantling of electronic waste, heavy metals and organic pollutants, especially heavy metal cadmium and persistent organic pollutants polychlorinated biphenyls, will be produced, which will pollute the farmland soil around the dismantling site and affect the local ecology environment and resident health. [0003] Currently, soil remediation technologies mainly include physical remediation, chemical remediation and biological remediation. Comprehensive comparison shows that among various remediation technologies, physical remediation technology is costly and requires a large amount of engineering, while chemical remediation has the risk of destroy...

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 吴玉锋李晓赵智博谭哲胡辰玮
Owner BEIJING UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com