Chemical eluting agent for repairing mercury polluted soil and application method of chemical eluting agent

A chemical eluting agent and rinsing agent technology, applied in the field of contaminated soil remediation, can solve the problems of long time required, large energy consumption and high cost, and achieve the effect of short remediation time, low cost and promotion of development.

Inactive Publication Date: 2017-02-22
BEIJING XINYUAN ENVIRONMENT CO LTD
View PDF3 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the remediation of mercury-contaminated soil mainly adopts soil-exchanging method, thermal desorption, phytoremediation, etc., but these methods have their own weaknesses and deficiencies. For example, the process of exchan

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

[0021] The soil contaminated by a chemical industry in Hunan was collected, and the mercury content in the soil was 3.9 mg / kg. The soil was air-dried naturally, after removing impurities, crushed, and passed through a 100-mesh sieve for later use. Prepare eluent A and eluent B respectively, wherein the concentration of hydrochloric acid, potassium iodide and sodium thiosulfate solution in eluent A is 0.3mol / L, and the concentration of sodium hydroxide solution in eluent B is 0.4mol / L , Sodium hypochlorite solution concentration is 5%. Weigh 5 g of pretreated soil into a 100 ml centrifuge tube, add 50 ml of eluent A, shake continuously for 8 hours, centrifuge, and discard the supernatant. Add water to the remaining soil and shake it for 1 hour, clean and rinse, discard the supernatant, add 50ml of eluent B to the remaining soil, shake continuously for 8 hours, centrifuge, and discard the supernatant. Water was added to the residual soil and shaken for 1 hour. After cleaning an...

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 a chemical eluting agent for repairing mercury polluted soil and an application method of the chemical eluting agent, and belongs to the technical field of polluted soil repairing. The eluting agent is composed of an independent agent A and an independent agent B. The agent A comprises a hydrochloric acid solution, a potassium iodide solution and a sodium thiosulfate solution. The agent B comprises a sodium hydroxide solution and a sodium hypochlorite solution. The application method of the chemical eluting agent includes the following steps of firstly, preprocessing and smashing the soil and picking out impurities, stones and the like; secondly, adding the eluting agent A and the mercury polluted soil according to the ratio of the polluted soil to the eluting agent being 1:10-1:20 for continuous or intermittent stirring for 4-8 h; thirdly, adding water to residual soil after solid-liquid separation for cleaning and eluting; fourthly, adding the eluting agent B to the soil obtained after cleaning and eluting in the third step for continuous or intermittent stirring for 4-8 h; fifthly, conducting direct backfilling after adding water to residual soil for cleaning and eluting after solid-liquid separation. The method mainly includes the two steps of eluting, and the mercury content in the soil is effectively reduced by means of the different eluting agent A and eluting agent B.

Description

[0001] technology neighborhood [0002] The invention belongs to the technical field of remediation of contaminated soil, in particular to methods for preparing and using a leaching agent in chemical leaching remediation. Background technique [0003] Due to the vigorous development of agriculture, industry, and mining, serious environmental pollution problems have been caused while the economy is developing. Among them, soil pollution is difficult to be quickly and effectively treated due to its latent, stable, and long-term characteristics. Mercury is a highly toxic non-essential element for life. Due to the high volatility of elemental mercury and its various organic compounds, it is easy to migrate and transform in the environment, and enter the human body through the food chain to cause irreversible harm. Therefore, Mercury has attracted much attention as a global environmental pollutant. In February 2006, the "Global Mercury Status Assessment" report issued by the Unit...

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): C09K17/02B09C1/02B09C1/08
CPCC09K17/02B09C1/02B09C1/08
Inventor 周建强韩君徐愿坚杨立鹏周敏高涛陈卫文何玉龙张如意王蕾凡祖伟
Owner BEIJING XINYUAN ENVIRONMENT CO LTD
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