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

Composite passivator for repairing cadmium-contaminated soil and application method of composite passivator

A technology of cadmium-contaminated soil and passivating agent is applied in the fields of agricultural soil remediation, environmental engineering, and cadmium-contaminated soil remediation, and achieves the effects of high efficiency, easy acquisition and simple compound method.

Active Publication Date: 2020-03-27
JIANGSU ACAD OF AGRI SCI
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved in the present invention is to develop an effective composite passivator for cadmium-contaminated farmland soil, so as to use the system effect to effectively improve the passivation repair effect on polluted soil

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 1

[0022] Example 1

[0023] 1.1 Configuration of soil for cadmium pollution test

[0024] The soil of a farmland in southern Jiangsu was taken, and its pH was measured to be 7.25, and Cd was mixed with CdCl 2 The form is added to the soil to balance in January, and the concentration of Cd in the soil is 3mg / kg.

[0025] 1.2 Preparation of passivating agent

[0026] Commercially available manganese dioxide was mixed with straw ash (wheat straw was burned at room temperature for 2 hours to form a substance with an ash content of 10%) at a weight ratio of 1:1, and mixed until uniform.

[0027] 1.3 Application of passivating agent

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 a composite passivator for repairing cadmium-contaminated soil and an application method of the composite passivator. The passivating agent is composed of manganese dioxide and straw ash; wherein the application amount of the passivating agent is 16%. The composite passivator formed by combining calcium magnesium phosphate fertilizer and straw ash can remarkably reduce theconcentration of available Cd in polluted farmland soil. The passivator disclosed by the invention is easily available in source, low in cost, simple in compounding method, and high in compounding efficiency. Meanwhile, due to the fact that a large amount of straw ash is used, a large amount of agricultural straw waste can be reasonably utilized, an effective circular economy system is achieved,and the development direction of circular agriculture is met. Based on the advantages, the composite passivator and the remediation method disclosed by the invention are a soil remediation method which is low in cost and high in efficiency, can significantly improve the physicochemical properties of cadmium-contaminated soil, and have great market promotion value.

Description

technical field [0001] The invention relates to the field of environmental engineering technology and the field of agricultural soil restoration, in particular to the field of restoration of cadmium-contaminated soil, and more specifically to a composite passivator for repairing cadmium-contaminated soil and an application method thereof. Background technique [0002] Cadmium pollution is a kind of heavy metal pollution. At present, in the heavy metal pollution of soil in my country, cadmium pollution can be said to be the main pollution contributing factor. [0003] The impact of cadmium on the human body is the same as that of many heavy metals. After entering the human body, it will accumulate in the body, damage the kidney function, and cause symptoms such as systemic pain. It is a typical "three-cause" substance. [0004] Therefore, cadmium pollution control has become a key issue in the field of agriculture and the environment. [0005] The purpose of heavy metal cont...

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): C09K17/02B09C1/08C09K101/00
CPCB09C1/08C09K17/02C09K2101/00
Inventor 童非张振华高岩张维国樊广萍陈未余垚刘丽珠
Owner JIANGSU ACAD OF AGRI SCI
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