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| Degradation of potassium alkyl xanthogenate in wet air oxidation: Enhancement method, degradation mechanism and structure impact | |
| Sun, Sihan1,3; Ren, Mingzhu1; Pan, Fusheng3; Yuan, Ling1; Ning, Pengge1,2; Sun, Zhi1,2; Xie, Yongbing1,2; Cao, Hongbin1,2,3 | |
| 2022-04-01 | |
| Source Publication | JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
 |
| ISSN | 2213-2929 |
| Volume | 10Issue:2Pages:9 |
| Abstract | Wet air oxidation (WAO) is suitable for high concentration organic wastewater treatment, but the oxidation efficiency still needs to be improved and the reaction mechanism is not clear. This work explored the enhancement of different chemicals to the WAO of typical pollutants in metallurgical wastewater and found that persulfate promoted WAO (PWAO) is very efficient in mineralization of potassium ethyl xanthate. The degradation rate and COD removal rate was over 99% and 96% after 30 min reaction, respectively. The oxidation of alkyl xanthate followed the pseudo first-order kinetics, with the constant order of potassium amyl xanthate > potassium ethyl xanthate > potassium butyl xanthate > potassium isopropyl xanthate. The EPR result confirmed that hydroxyl radicals (.OH) was the dominant active species in the WAO and PWAO processes, and persulfate significantly increased the production of .OH. It was found that the electrophilic reactivity s-(1S) of the S atom in the -C--S and the lipophilic coefficient ClgP of xanthate were the main factors affecting the degradation of xanthate, by constructing a quantitative structure-activity relationship model. The results reveal that PWAO can be used in efficient degradation of flotation reagents, based on which a green metal leaching process and simultaneous organics degradation can be possibly developed in future. |
| Keyword | Wet air oxidation Xanthate Advanced oxidation processes Wastewater treatment Density functional theory |
| DOI | 10.1016/j.jece.2022.107349 |
| Language | 英语 |
| WOS Keyword | MOLECULAR-ORBITAL METHODS ; BASIS-SETS ; ETHYL-XANTHATE ; KINETICS ; REMOVAL ; PERSULFATE ; ATOMS |
| Funding Project | National Key Research and Development Program, Strategic Priority Research Program of the Chinese Academy of Sciences[XDA21021102] ; 14th Five-year Informatization Plan of Chinese Academy of Sciences, Construction of Scientific Data Center System[WX145XQ07-12] |
| WOS Research Area | Engineering |
| WOS Subject | Engineering, Environmental ; Engineering, Chemical |
| Funding Organization | National Key Research and Development Program, Strategic Priority Research Program of the Chinese Academy of Sciences ; 14th Five-year Informatization Plan of Chinese Academy of Sciences, Construction of Scientific Data Center System |
| WOS ID | WOS:000788091400008 |
| Publisher | ELSEVIER SCI LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.ipe.ac.cn/handle/122111/53120 |
| Collection | 中国科学院过程工程研究所 |
| Corresponding Author | Pan, Fusheng; Xie, Yongbing |
| Affiliation | 1.Chinese Acad Sci, Beijing Engn Res Ctr Proc Pollut Control, Inst Proc Engn, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Natl Basic Publ Sci Data Ctr, Beijing 100190, Peoples R China 3.Tianjin Univ, Sch Chem Engn & Technol, Minist Educ, Key Lab Green Chem Technol, Tianjin 300072, Peoples R China |
| Recommended Citation GB/T 7714 | Sun, Sihan,Ren, Mingzhu,Pan, Fusheng,et al. Degradation of potassium alkyl xanthogenate in wet air oxidation: Enhancement method, degradation mechanism and structure impact[J]. JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING,2022,10(2):9. |
| APA | Sun, Sihan.,Ren, Mingzhu.,Pan, Fusheng.,Yuan, Ling.,Ning, Pengge.,...&Cao, Hongbin.(2022).Degradation of potassium alkyl xanthogenate in wet air oxidation: Enhancement method, degradation mechanism and structure impact.JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING,10(2),9. |
| MLA | Sun, Sihan,et al."Degradation of potassium alkyl xanthogenate in wet air oxidation: Enhancement method, degradation mechanism and structure impact".JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING 10.2(2022):9. |
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