WANG Feng,DONG Wen-yi,CAI Qian,et al.In-situ Remediation of Contaminated Sediment by CaO2 Combined with H2O2[J].China Water & Wastewater,2021,37(19 19):67-71.
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In-situ Remediation of Contaminated Sediment by CaO2 Combined with H2O2

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第37卷 Number: 19 19 Page: 67-71 Column: Date of publication: 2021-10-01
Author(s):
WANG Feng1; DONG Wen-yi1; 2; CAI Qian3; WANG Hong-jie1; 2; ZHAO Yue1; HUANG Jie1
(1. School of Civil and Environmental Engineering, Harbin Institute of Technology, Shenzhen 518055， China； 2. State Key Laboratory of Urban Water Resource and Environment, Harbin 150090， China; 3. Shenzhen Water Co. Ltd., Shenzhen 518000， China)
Keywords:
ontaminated sediment; CaO2 combined with H2O2; in-situ remediation; economic analysis
Abstract:
The contaminated sediment from a contaminated river in Shenzhen was remedied in-situ by a chemical method of CaO2 combined with H2O2. The effects of the method on the sediment physicochemical properties and pollutant removal efficiency were investigated, and the economic feasibility was analyzed. The in-situ remediation method of CaO2 combined with H2O2 had a significant effect on the contaminated sediment. The color of the sediment rapidly changed from black to yellow, and the oxidation reduction potential increased from -160 mV to 90 mV. The removal efficiency of the acid volatile sulfide in the sediment was more than 99%, and that of the total organic carbon was about 24.2%. Meanwhile, the total nitrogen in 1 kg absolute dry sediment decreased by approximately 400 mg, and total phosphorous was no significant change, respectively. The economic analysis showed that the cost of the in-situ remediation of the contaminated river sediment by CaO2 combined with H2O2 was approximately 33.4 yuan/m2 and was more economical than the dredging technology.
Last Update: 2021-10-01