Method for simultaneous producing and repairing of mild cadmium contaminated soil

A cadmium-contaminated soil, mild technology, applied in the field of phytoremediation of soil heavy metal pollution, can solve the problems of long cycle time, low extraction rate, unacceptable, etc.

Inactive Publication Date: 2019-04-16
CHINA CITY ENVIRONMENT PROTECTION ENGINEERING LIMITED COMPANY
View PDF9 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, there are still some difficulties in the practical application of phytoremediation technology, such as the hyperaccumulation plant species of heavy metals are few, the biomass is not large, the extraction rate is not high, and some plants have poor stress resistance in the field growth process. The management process is relatively complex, etc.
In addition, phytoremediation generally requires a long period of time, and most of the plants used for remediation do not have high agricultural utilization value, cannot bring a certain economic income to local farmers, and are not easily accepted by local farmers.

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 simultaneous producing and repairing of mild cadmium contaminated soil
  • Method for simultaneous producing and repairing of mild cadmium contaminated soil
  • Method for simultaneous producing and repairing of mild cadmium contaminated soil

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment

[0030] Optimizing the above scheme, in the S1 step, the cadmium-enriched plants include pokeweed and ghost needles, the pokeweed is planted between February and March every year, and the ghost needles are planted between March and March every year. Planting between April, the planting time of the ghost needle grass is later than the planting time of the pokeweed. In this example, both pokeweed and ghost needles have the characteristics of large biomass, well-developed root system, and strong stress resistance. They have wide adaptability to soil, simple planting and management methods, and good cadmium enrichment effect. Moreover, there is a large difference in plant height between pokeweed and ghost needles, and there will be no spatial competition. Moreover, ghost needles can be mowed many times a year, which can speed up the treatment of cadmium pollution in the soil. The plant height of pokeweed is relatively high, and planting it between February and March can ensure that...

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 relates to the technical field of soil heavy metal pollution phytoremediation, and provides a method for simultaneous producing and repairing of mild cadmium contaminated soil. The method includes the steps of S1, successively sowing a variety of cadmium-rich plants with large plant height differences in the form of intercropping in soil with mild cadmium contamination according to seasons; S2, interplanting cucurbitaceae climbing herbaceous plants with low cadmium enrichment on the cadmium-rich plants, and picking at the time of fruit ripening; S3, timely conducting mowing and stubble remaining on the cadmium-rich plants, and removing all plants in the soil from roots between September and October; S4, detecting the cadmium content of the soil, if not qualified, repeating S1-S3 steps, carrying out the next batch of planting, and if qualified, stopping planting. The cadmium-enriched plants with high plant height differences are sown, the cucurbitaceae climbing herbaceousplants with the low cadmium enrichment is inter-planted thereon, and the above plants can effectively treat cadmium pollution in the soil due to the fact that there is no competition in the growth space, and can also bring economic income.

Description

technical field [0001] The invention relates to the technical field of phytoremediation of soil heavy metal pollution, in particular to a method for production while repairing medium-light cadmium-contaminated soil. Background technique [0002] Soil cadmium pollution is one of the ten serious environmental problems facing society today. In nature, soil cadmium pollution has the characteristics of long decomposition period, high mobility, high toxicity, and refractory degradation. In my country, the cadmium-contaminated area of ​​farmland soil alone has exceeded 20×10 4 hm 2 , the annual production of agricultural products with excessive cadmium content reaches 14.6×10 8 kg. [0003] At present, the commonly used soil cadmium pollution remediation technologies mainly include physical remediation technology, chemical remediation technology and biological remediation technology (phytoremediation and microbial remediation, etc.). Among them, phytoremediation technology can...

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): A01B79/02B09C1/00
CPCA01B79/02B09C1/105B09C2101/00
Inventor 殷志遥冉宇景琪田靓赵颖刘更生
Owner CHINA CITY ENVIRONMENT PROTECTION ENGINEERING LIMITED COMPANY
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