公开(公告)号：US20190091742A1

公开(公告)日：2019-03-28

申请号：US16206759

申请日：2018-11-30

Applicant: QINGDAO TECHNOLOGICAL UNIVERSITY

Inventor： Dalei ZHANG ,  Yuhao ZHAO ,  Yingfei SUN ,  Manqian WANG ,  Xinyu WANG ,  Shuang WANG

IPC: B09C1/08 ,  B09C1/00 ,  C09K17/48

CPC classification number: B09C1/08 ,  B09C1/002 ,  B09C1/10 ,  B09C2101/00 ,  C09K17/48

Abstract: Disclosed is an in-situ detoxification method for a heavily contaminated site by hexavalent chromium. The method includes injecting a chemical reducing agent into a site heavily contaminated with hexavalent chromium, and injecting a chromium soil remediation microbial agent into the site after 0-10 days. The in-situ detoxification method includes: first, in-situ injecting the chemical reducing agent into the soil, preliminarily reducing high-concentration hexavalent chromium such that the hexavalent chromium of high concentration has no toxic effect on the subsequent ecological microbial agent, then in-situ injecting the ecological microbial agent prepared from biogas residue, a carbon source and sulfate into the chromium-containing soil under pressure, and forming a large-scale reducing buffer zone containing sulfate-reducing bacteria and sulfide in a special maintenance manner in the subsurface soil of the site to reduce the hexavalent chromium continuously and effectively.

公开(公告)号：US20180312933A1

公开(公告)日：2018-11-01

申请号：US16028319

申请日：2018-07-05

Applicant: QINGDAO TECHNOLOGICAL UNIVERSITY

Inventor： Dalei ZHANG ,  Shenqian DENG ,  Jian LI ,  Ruidong LI ,  Yuanfeng QI

IPC: C21B3/08 ,  C10B53/07 ,  C10B57/00 ,  B09B3/00 ,  B09B5/00

CPC classification number: C21B3/08 ,  B09B3/00 ,  B09B3/0083 ,  B09B3/0091 ,  B09B5/00 ,  C10B49/14 ,  C10B53/07 ,  C10B57/005 ,  C10K3/02 ,  C10K3/04 ,  C21B2200/00 ,  C21B2300/02 ,  C21B2400/02 ,  C21B2400/024 ,  C21B2400/026 ,  C21B2400/06 ,  C21B2400/072 ,  C21C2200/00 ,  Y02P20/129 ,  Y02P20/143

Abstract: The present invention provides a method of simultaneously recycling plastics and detoxifying chromite ore processing residue with residual heat from a steel slag. By heating and gasifying plastics with steel slag, followed by catalytically split-decomposing the plastics with catalysts such as chromite ore processing residue, the plastics are thoroughly converted into a energy gas under water vapor gasification. The surface coking of Chromite Ore Processing Residue is avoided. Meanwhile, the energy gas reduces Cr6+ in Chromite Ore Processing Residue into Cr3+, and the energy gas is cooled, and CO2 and Cl in the energy gas are adsorbed by alkaline substances in Chromite Ore Processing Residue. With this method, chromite ore processing residue is detoxified, and steel slag is cooled, furthermore, energy is saved and a energy gas is obtained.

公开(公告)号：US20190091741A1

公开(公告)日：2019-03-28

申请号：US16206750

申请日：2018-11-30

Applicant: QINGDAO TECHNOLOGICAL UNIVERSITY

Inventor： Dalei ZHANG ,  Yuhao ZHAO ,  Lu CHEN ,  Jianju LI ,  Feng ZHAO ,  Wentao LUO

IPC: B09C1/08 ,  C09K17/48

CPC classification number: B09C1/08 ,  B09C2101/00 ,  C09K17/48

Abstract: Disclosed is a biogas residue-based in situ and ectopic coupled detoxification method for hexavalent chromium site and soil remediation agent. The method is applied to chromium-containing soil by formulating biogas residue, a carbon source and a sulfate into said soil remediation agent. Special construction and maintenance methods are adopted to achieve effective reduction of hexavalent chromium in deep contaminated soil. Therefore, the biogas residue-based in situ and ectopic coupled detoxification method for hexavalent chromium-containing sites cannot only be used to remediate chromium-containing sites deep in depth at a low cost and high efficiency, but also achieve recycled utilization of waste by treating waste with one another, thereby possessing significant value in promotion and practice.