Agent composition and method for restoring chromium-pollution soil

A technology for chromium-contaminated soil and composition, which is applied in the restoration of polluted soil, fertilizer mixture, soil conditioning materials, etc., to achieve the effects of simple construction process, simple operation, and long-term stability assurance

Inactive Publication Date: 2018-08-17
BEIJING GEOENVIRON ENG & TECH +1
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a long-term stable repairing agent and method for high-concentratio

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
  • Agent composition and method for restoring chromium-pollution soil

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0033] Example 1

[0034] Select sample 1 for experiment, select 200g of ground sample, add 20g of ferrous sulfate (effective content of 85%), add 6g of iron powder (content of elemental iron 65%), mix uniformly and cure for 2 days; cure for ferrous sulfate and iron powder After the end, add 6g quicklime (effective content 87%), mix and cure for 2 days; add 4g organic fertilizer (total nutrients greater than 25%, organic matter greater than 30%) after the quicklime curing; add organic fertilizer for 1 day, 15 days, Tests were performed on 30 days and 60 days respectively.

Example Embodiment

[0035] Example 2

[0036] Select sample 2 for experiment, select 200g of ground sample, add 40g of ferrous sulfate (effective content of 85%), add 6g of iron powder (content of elemental iron 65%), mix and cure for 2 days; cure for ferrous sulfate and iron powder After the end, add 6g quicklime (effective content 87%), mix and cure for 2 days; add 4g organic fertilizer (total nutrients greater than 25%, organic matter greater than 30%) after the quicklime curing; add organic fertilizer for 1 day, 15 days, Tests were performed on 30 days and 60 days respectively.

Example Embodiment

[0037] Example 3

[0038] Select sample 3 for the experiment, select 200g of ground sample, add 60g of ferrous sulfate (effective content 85%), add 6g of iron powder (content of elemental iron 65%), mix and cure for 2 days; ferrous sulfate, iron powder After curing, add 6g of quicklime (effective content 87%), mix and cure for 2 days; add 4g of organic fertilizer (total nutrients greater than 25%, organic matter greater than 30%) after the completion of quicklime curing; curing for 1 day, 15 days after adding organic fertilizer , 30 days and 60 days respectively.

[0039] After the curing of Examples 1-3, the concentration was determined as follows:

[0040] Table 3 Test results after adding chemicals to test soil

[0041]

[0042] It can be known from the detection of the treated chromium-contaminated samples that the agent and treatment method of the present invention can remediate the soil contaminated by high-concentration heavy metal chromium within the scope of the national reg...

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 discloses an agent composition and a method for restoring chromium-pollution soil. The agent composition comprises, by weight, 10-70 parts of ferrous sulfate, 2-10 parts of iron powder,2-10 parts of alkaline agent and 1-8 parts of organic fertilizer. Compared with the prior art, the agent composition has the advantages of being easy-to-obtain in raw material, proper in cost, simplein operation and high in restoration effect long-time stability; adding proportion of the agent composition is determined according to soil pollution degree and physiochemical properties, agent wastecaused by excessive restoration is avoided, and secondary pollution risk is lowered.

Description

technical field [0001] The invention belongs to the field of environmental restoration engineering, and more specifically relates to a pharmaceutical composition and a method for repairing chromium-contaminated soil. Background technique [0002] Chromium exists in two forms of hexavalent and trivalent in nature. Hexavalent chromium is oxidizing and can strongly destroy organisms. It is one of the internationally recognized carcinogenic heavy metals. Chromium and its compounds have been widely used in various fields of modern industrial production. They are indispensable in metallurgy, printing, leather, pharmaceuticals and other industries. less important raw materials. Due to improper management of chromium-containing pollutants in industrial production, a large amount of chromium-containing wastewater and waste residues are directly discharged without detoxification treatment, resulting in environmental pollution. According to the survey, there have been nearly 60 chrom...

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): B09C1/08C09K17/40
CPCB09C1/08C09K17/40
Inventor 吕正勇魏丽苗竹张亮亮任贝
Owner BEIJING GEOENVIRON ENG & TECH
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