title: Heterogeneous catalytic ozonation of biologically pretreated Lurgi coal gasification wastewater using sewage sludge based activated carbon supported manganese and ferric oxides as catalysts.
abstract: Sewage sludge of biological wastewater treatment plant was converted into sewage sludge based activated carbon (SBAC) with ZnCl₂ as activation agent, which supported manganese and ferric oxides as catalysts (including SBAC) to improve the performance of ozonation of real biologically pretreated Lurgi coal gasification wastewater. The results indicated catalytic ozonation with the prepared catalysts significantly enhanced performance of pollutants removal and the treated wastewater was more biodegradable and less toxic than that in ozonation alone. On the basis of positive effect of higher pH and significant inhibition of radical scavengers in catalytic ozonation, it was deduced that the enhancement of catalytic activity was responsible for generating hydroxyl radicals and the possible reaction pathway was proposed. Moreover, the prepared catalysts showed superior stability and most of toxic and refractory compounds were eliminated at successive catalytic ozonation runs. Thus, the process with economical, efficient and sustainable advantages was beneficial to engineering application.
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
authors.forename: Haifeng
authors.initials: H
authors.lastname: Zhuang
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China. Electronic address: han13946003379@163.com.
authors.forename: Hongjun
authors.initials: H
authors.lastname: Han
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
authors.forename: Baolin
authors.initials: B
authors.lastname: Hou
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
authors.forename: Shengyong
authors.initials: S
authors.lastname: Jia
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
authors.forename: Qian
authors.initials: Q
authors.lastname: Zhao
mesh_terms: D000327:Adsorption; D000818:Animals; D057919:Biological Oxygen Demand Analysis; D002384:Catalysis; D002606:Charcoal / Q000737:chemistry; D002712:Chlorides / Q000737:chemistry; D003031:Coal / Q000032:analysis*; D003621:Daphnia / Q000187:drug effects; D005290:Ferric Compounds; D017895:Manganese Compounds; D010087:Oxides; D010126:Ozone / Q000737:chemistry*; D012722:Sewage / Q000737:chemistry*; D013052:Spectrometry, X-Ray Emission; D023382:Toxicity Tests, Acute; D062065:Wastewater / Q000737:chemistry* / Q000633:toxicity; D014961:X-Ray Diffraction; D017967:Zinc Compounds / Q000737:chemistry
chemical_list: D002606:Charcoal; D002712:Chlorides; D003031:Coal; D005290:Ferric Compounds; D017895:Manganese Compounds; D010087:Oxides; D010126:Ozone; D012722:Sewage; D062065:Wastewater; D017967:Zinc Compounds; C000499:ferric oxide; C027424:manganese oxide; C016837:zinc chloride
keywords: Biologically pretreated Lurgi coal gasification wastewater; Catalysts; Heterogeneous catalytic ozonation; Hydroxyl radicals; Refractory compounds