Bioremediation method for heavy metal contaminated soil

A bioremediation and contaminated soil technology, applied in the field of bioremediation of heavy metal-contaminated soil, can solve the problems of single planting, less complex heavy metal pollution, and single heavy metal to be repaired, and achieve the elimination of empty window period, remarkable repair effect and huge application potential Effect

Pending Publication Date: 2022-04-08
GUILIN UNIVERSITY OF TECHNOLOGY
View PDF12 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Compared with traditional physical and chemical remediation methods, phytoremediation has the advantages of cost-effectiveness, environmental friendliness, and easy operation, and is especially suitable for heavy metal-contaminated soil in large areas of farmland. However, the plant species currently used are single and can be used for remediation of heavy metal It is also relatively single, and less applicable to phytoremediation methods for complex heavy metal pollution

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
  • Bioremediation method for heavy metal contaminated soil
  • Bioremediation method for heavy metal contaminated soil
  • Bioremediation method for heavy metal contaminated soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The test site is a cadmium-lead compound polluted farmland in Sidi Village, Yangshuo County, Guilin City, Guangxi. The cause of the pollution is the downstream farmland pollution caused by the upstream lead-zinc mine tailings. The soil physical and chemical properties: total cadmium 2.70mg / kg, effective cadmium 1.52mg / kg kg, total lead 275mg / kg, available lead 139mg / kg, pH 6.11, organic matter content 0.5%, ammonium nitrogen 19.3mg / kg, available phosphorus 53.1mg / kg, available potassium 213.6mg / kg.

[0031] The test area was divided into 1 control group and 3 treatment groups:

[0032] The control group was not planted;

[0033] Treatment group: Crop rotation of Taiwan green sedum and German sedum (crop rotation group), Taiwan green sedum and German sedum alone;

[0034] Each group was repeated 3 times, each with an area of ​​2m×4m, and all plots were randomly arranged to control the field experiment error.

[0035] Control group: During the entire test period, no pla...

Embodiment 2

[0048] The heavy metal-enriched plants Pseudomonas taiwanensis and Sedum germanum were used as plant materials. The seeds of Taiwan sage are taken from the demonstration base of phytoremediation of heavy metal pollution in the school, which is located in the tailings bank of the lead-zinc mine in Sidi Village, Xingping Town, Yangshuo County, Guilin City. Select seeds with full grains and use 10% H 2 o 2 After soaking and disinfecting the solution, rinse with distilled water and sow seeds in the seedling trays, place the seedling trays in a greenhouse, keep the temperature at 25-30°C during the day, 15-20°C at night, and the light intensity at 250μmolphotons m -2 the s -1 , The average daily light time is 12-14 hours, and the relative humidity is 70-75%. Irrigate with tap water (Cd not detected) every day, and keep the soil water content at 50%. After the seeds germinate, irrigate with 1 / 2 concentration of Hongland nutrient solution once a week. After the seedlings grow 4 t...

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 provides a bioremediation method for heavy metal contaminated soil, and particularly relates to the technical field of heavy metal contaminated soil remediation. According to the method, crop rotation of the Taiwan feather cockscomb and the red-spotted stonecrop is utilized for cadmium-lead combined pollution farmland soil remediation, the independent remediation window period is perfectly eliminated, the plant remediation efficiency can be improved, the soil remediation period is shortened, and the remediation cost is reduced. The embodiment proves that the Taiwan feather cockscomb and German red-spotted stonecrop crop rotation mode has a very obvious remediation effect on the cadmium-lead combined pollution of the soil, and has huge application potential.

Description

technical field [0001] The invention belongs to the technical field of remediation of soil heavy metal pollution, and in particular relates to a bioremediation method of heavy metal polluted soil. Background technique [0002] Cadmium (Cd) and lead (Pb) are common heavy metal pollutants in the soil of our country, and the excessive rate of cadmium sites in the soil of our country is the highest among all heavy metal pollutants. Compared with other heavy metal elements, cadmium has higher mobility and bioavailability, and it is easy to enter the human body through the soil-crop-food chain. Long-term consumption of cadmium-contaminated food may cause "bone pain disease", which seriously endangers human health. At present, the remediation of cadmium-lead compound polluted farmland soil is imperative. [0003] Compared with traditional physical and chemical remediation methods, phytoremediation has the advantages of cost-effectiveness, environmental friendliness, and easy oper...

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
Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/10B09C1/08
Inventor 俞果刘杰蒋萍萍林华蒋旭升莫凌云
Owner GUILIN 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