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Title:
IN-SITU DETOXIFICATION METHOD FOR SITE HEAVILY CONTAMINATED WITH HEXAVALENT CHROMIUM, AND CHROMIUM SOIL REMEDIATION MICROBIAL AGENT AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2017/206844
Kind Code:
A1
Abstract:
An in-situ detoxification method for a site heavily contaminated with hexavalent chromium, comprising: injecting a chemical reducing agent into a site heavily contaminated with hexavalent chromium, and 0-10 days later, injecting a chromium soil remediation microbial agent into the site. The in-situ detoxification method comprises: first in-situ injecting the chemical reducing agent into soil, preliminarily reducing high-concentration hexavalent chromium so that the high-concentration hexavalent chromium has no toxic effect on a subsequent ecological microbial agent, then in-situ injecting the ecological microbial agent prepared from biogas residues, a carbon source, and sulfate into chromium-containing soil under pressure, and by means of special maintenance, forming a large-scale reducing buffer zone containing sulfate-reducing bacteria and sulfide in subsurface soil of the site, and continuously and effectively reducing hexavalent chromium. The method can efficiently reduce hexavalent chromium, and reduce costs. Also disclosed is a chromium soil remediation microbial agent. Also disclosed is a method for preparing a chromium soil remediation microbial agent, comprising: mixing biogas residues and a carbon source solution, and then reacting for 0-5 days.

Inventors:
ZHANG, Dalei (Faculty of Environment, Qingdao TechnologicalUniversity, No.11 Fushun Road, Shibei Distric, Qingdao Shandong 3, 266033, CN)
ZHAO, Yuhao (Faculty of Environment, Qingdao TechnologicalUniversity, No.11 Fushun Road, Shibei Distric, Qingdao Shandong 3, 266033, CN)
SUN, Yingfei (Faculty of Environment, Qingdao TechnologicalUniversity, No.11 Fushun Road, Shibei Distric, Qingdao Shandong 3, 266033, CN)
WANG, Manqian (Faculty of Environment, Qingdao TechnologicalUniversity, No.11 Fushun Road, Shibei Distric, Qingdao Shandong 3, 266033, CN)
WANG, Xinyu (Faculty of Environment, Qingdao TechnologicalUniversity, No.11 Fushun Road, Shibei Distric, Qingdao Shandong 3, 266033, CN)
WANG, Shuang (Faculty of Environment, Qingdao TechnologicalUniversity, No.11 Fushun Road, Shibei Distric, Qingdao Shandong 3, 266033, CN)
Application Number:
CN2017/086385
Publication Date:
December 07, 2017
Filing Date:
May 27, 2017
Export Citation:
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Assignee:
QINGDAO TECHNOLOGICAL UNIVERSITY (No.11 Fushun Road, Shibei DistrictQingdao, Shandong 0, 266000, CN)
International Classes:
B09C1/08
Foreign References:
CN105945050A2016-09-21
CN104815844A2015-08-05
CN105598148A2016-05-25
CN105013810A2015-11-04
CN104841693A2015-08-19
CN104741373A2015-07-01
Attorney, Agent or Firm:
CHOFN INTELLECTUAL PROPERTY (Room 1215-1218, Floor 12 Left Bank Community,No.68 Beisihuanxilu, Haidian District, Beijing 0, 100080, CN)
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