Composite conditioner for remediation of farmland heavy metal contaminated soil and preparation method thereof

A technology for polluted soil and heavy metals, applied in the field of soil remediation, can solve the problems of soil cultivating decline, secondary pollution, and large amount of engineering, and achieve the effects of reducing absorption, good remediation, and low cost

Inactive Publication Date: 2017-05-31
东莞中科土壤科技开发有限公司
View PDF9 Cites 31 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this type of technology can completely reduce the heavy metal content in the soil, it has disadvantages such as high cost, large amount of engineering, and easy to produce secondary pollution.
The solidification and stabilization repair method is simple, low in cost, wide in scope of application, and has good application prospects, but there are problems such as low efficiency, poor stability, and decreased soil plowability. Therefore, it is necessary to develop an efficient and stable environment-friendly conditioner. It has become a hot spot in the field of soil remediation research

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

[0024] A composite conditioner for repairing farmland heavy metal polluted soil, which consists of the following substances in parts by weight: 48 parts of modified biochar, 20 parts of chicken manure, 20 parts of modified bentonite, 5 parts of phosphate, and 7 parts of quicklime.

[0025] This compound conditioner is made by following steps:

[0026] 1) Preparation steps of modified biochar: Mix biochar from corn stalks obtained by high temperature pyrolysis at 300°C for 3 hours and 1.8mol / L dilute sulfuric acid at a mass ratio of 1:6.5, seal and vibrate for 1 hour, filter, Wash the biochar twice with deionized water, filter and dry; add the dried biochar to 5% Na 2 S solution, mixed and stirred for 1 hour, filtered and dried to obtain modified biochar;

[0027] 2) Preparation steps of modified clay: mix bentonite and 1.8mol / L dilute sulfuric acid solution at a mass ratio of 1:6.0, o Under the condition of C, react for 2 hours, filter and dry to obtain modified bentonite; ...

Embodiment 2

[0030] A composite conditioner for repairing farmland heavy metal polluted soil, which consists of the following materials in parts by weight: 52 parts of modified biochar, 15 parts of chicken manure, 22 parts of modified bentonite, 6 parts of phosphate, and 5 parts of quicklime.

[0031] This compound conditioner is made by following steps:

[0032] 1) Preparation steps of modified biochar: Mix corn stalk biochar obtained by high-temperature pyrolysis at 400°C for 2 hours and 1.5mol / L dilute sulfuric acid at a mass ratio of 1:7.3, seal and vibrate for 1 hour, filter, Wash the biochar twice with deionized water, filter and dry; add the dried biochar to 3% Na 2 S solution, mixed and stirred for 2 hours, filtered and dried to obtain modified biochar;

[0033] 2) Preparation steps of modified clay: mix bentonite and 1.5mol / L dilute sulfuric acid solution at a mass ratio of 1:7.0, o Under the condition of C, react for 2.5 hours, filter and dry to obtain modified bentonite;

[0...

Embodiment 3

[0036] A composite conditioner for repairing heavy metal polluted soil in farmland, which consists of the following substances in parts by weight: 42 parts of modified biochar, 25 parts of chicken manure, 15 parts of modified bentonite, 8 parts of calcium phosphate and 10 parts of quicklime.

[0037] This compound conditioner is made by following steps:

[0038] 1) Preparation steps of modified biochar: Mix biochar from corn stalks obtained by pyrolysis at 450°C for 2 hours and 1.6mol / L dilute sulfuric acid at a mass ratio of 1:5.0, seal and vibrate for 1 hour, filter, Wash the biochar 3 times with deionized water, filter and dry; add the dried biochar to 4% Na 2 S solution, mixed and stirred for 1.5 hours, filtered and dried to obtain modified biochar;

[0039] 2) Preparation steps of modified clay: mix bentonite and 1.6mol / L dilute sulfuric acid solution at a mass ratio of 1:5.5, o Under the condition of C, react for 3 hours, filter and dry to obtain modified bentonite;

...

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 field of soil remediation, particularly to a composite conditioner for remediation of farmland heavy metal contaminated soil and a preparation method thereof. The composite conditioner comprises the following substances in parts by mass: 40 to 55 parts of modified biological carbon, 15 to 25 parts of poultry manure, 15 to 25 parts of modified clay, 5 to 8 parts of phosphate and 5 to 12 parts of quick lime. Through combined utilization of organic modified substances, inorganic modified substances and other effective components, the composite conditioner achieves the good effect of multi-action synergetic remediation, and has the characteristics that the cost is low, the effect is good, the stability is high, the soil cultivability can be improved, and increase of crop yield and income is facilitated.

Description

technical field [0001] The invention relates to the field of soil remediation, in particular to a composite conditioner for remediation of farmland heavy metal polluted soil and a preparation method thereof. Background technique [0002] With the continuous advancement of my country's industrialization process, a large number of pollutants are discharged into the soil environment, causing serious soil pollution. The survey shows that nearly one-sixth of the soil in our country is polluted to varying degrees, among which the soil of cultivated land is most seriously polluted by heavy metals. Heavy metal pollutants in cultivated soil mainly enter the food chain through being absorbed by crops, and are finally absorbed and accumulated by the human body, endangering human health. At the same time, rainwater leaching will also cause heavy metal pollutants in the soil to enter the surrounding surface water and groundwater environment Cause persistent secondary pollution. Therefo...

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): B09C1/00
CPCB09C1/00B09C2101/00
Inventor 肖定书李小飞郑煜基何辉
Owner 东莞中科土壤科技开发有限公司
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