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

Heavy metal soil remediation agent and method based on magnesium oxide-montmorillonite composite material synergistic composting

A technology of soil remediation agent and composite material, which is applied in the field of heavy metal soil remediation agent based on magnesia-montmorillonite composite material synergistic composting, which can solve the problems of heavy metal reactivation, secondary pollution, change, etc., and improve soil physical and chemical properties , increase the pH value, and reduce the cost

Inactive Publication Date: 2019-08-16
HUNAN UNIV
View PDF5 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these passivators also have deficiencies, such as long-term use of lime will have a certain impact on the physical properties of the soil such as caking, etc., the overall fertility level will decline, and the adsorption and complexation of compost to heavy metals will increase over time. The continuous decomposition and reduction of compost may lead to changes in soil pH, reactivation and release of heavy metals, resulting in secondary 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
  • Heavy metal soil remediation agent and method based on magnesium oxide-montmorillonite composite material synergistic composting
  • Heavy metal soil remediation agent and method based on magnesium oxide-montmorillonite composite material synergistic composting
  • Heavy metal soil remediation agent and method based on magnesium oxide-montmorillonite composite material synergistic composting

Examples

Experimental program
Comparison scheme
Effect test

experiment example 1

[0070] A method for repairing cadmium-contaminated soil by synergistic composting of magnesium oxide-montmorillonite composite material of the present invention comprises the following steps:

[0071] (1) Cadmium-contaminated soil configuration: The experimental soil was collected from Hunan Agricultural University. The cadmium-contaminated soil was prepared by artificially adding cadmium solution. The cadmium-contaminated soil was incubated at a constant temperature of 25°C for two months to stabilize the form of cadmium. The cadmium content in the soil was measured by inductively coupled plasma optical emission spectrometer (ICP-OES) to be 2.55mg / kg. Soil remediation experiments were then carried out.

[0072] (2) Cadmium-contaminated soil remediation: get the cadmium-contaminated soil after six groups of steps (1) stabilization of the same weight, add the passivator of 3%wt in the soil, according to the combination of magnesium oxide-montmorillonite and compost in the passi...

experiment example 2

[0081] A method of utilizing magnesium oxide-montmorillonite composite material synergistic composting of the present invention to repair composite heavy metal polluted soil comprises the following steps:

[0082] (1) Collection of compound heavy metal-contaminated soil: The experimental soil was collected from Hunan Agricultural University. The compound heavy metal-contaminated soil was prepared by artificially adding copper, cadmium, lead, and zinc solutions, and the compound heavy metal-contaminated soil was incubated at 25°C for two months. , so that the form of heavy metals tends to be stable. The contents of copper, cadmium, lead, and zinc in the soil were measured by inductively coupled plasma optical emission spectrometer (ICP-OES) to be 293.5mg / kg, 3.05mg / kg, 898mg / kg, and 724mg / kg, respectively, and then the soil remediation experiment was carried out.

[0083](2) Restoration of compound heavy metal-contaminated soil: The compound heavy metal-contaminated soil stabil...

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 heavy metal soil remediation agent and method based on magnesium oxide-montmorillonite composite material synergistic composting, belonging to the technical field of heavy metal soil remediation. The heavy metal soil remediation agent comprises a magnesium oxide-montmorillonite composite material and compost. The montmorillonite has a layered structure. The magnesium oxide-montmorillonite composite material is a material in which magnesium oxide is loaded on the surface and interlayer of the montmorillonite. The remediation agent and the remediation method can enableheavy metals to form stable chemical forms and complete remediation of heavy metal soil. The method has the advantages of low cost, simplicity, high efficiency, environmental friendliness and the like, and has good remediation effect on soil polluted by single cadmium pollution and composite heavy metals.

Description

technical field [0001] The invention belongs to the technical field of heavy metal soil restoration, and in particular relates to a heavy metal soil restoration agent and method based on magnesium oxide-montmorillonite composite material synergistic composting. Background technique [0002] According to the "National Soil Pollution Survey Bulletin" jointly issued by the Ministry of Environmental Protection and the Ministry of Land and Resources in 2014, the overall state of the soil environment in the country is not optimistic. The polluted soil is mainly heavy metals, mainly cadmium, mercury, arsenic, copper, lead, Chromium, zinc, nickel 8 kinds of heavy metals. The remediation and treatment of heavy metal-contaminated soil has become one of the major problems that need to be solved urgently in the field of environmental protection in my country. With the deepening of research in recent years, the scientific community has realized that what really affects the risk of soil ...

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): B09C1/08C09K17/08C09K109/00
CPCB09C1/08C09K17/08C09K2109/00
Inventor 袁兴中姚赛熊婷蒋龙波陈鸿鹄杨羽茜彭叶琼曾光明
Owner HUNAN UNIV
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