Process optimization for microcystin-LR degradation by Response Surface Methodology and mechanism analysis in gas–liquid hybrid discharge system.
A gas–liquid hybrid discharge system was applied to microcystin-LR (MC-LR) degradation. MC-LR degradation was completed after 1 min under a pulsed high voltage of 16 kV, gas–liquid interface gap of 10 mm and oxygen flow rate of 160 L/h. The Box–Behnken Design was proposed in Response Surface Methodo...
| Publicado en: | Journal of Environmental Management Vol. 183; pp. 726 - 733 |
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| Autores principales: | , , , , , , |
| Formato: | Artículo |
| Publicado: |
Academic Press Inc.
Dec2016 Part 3
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| Materias: | |
| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ssf&AN=118569027&site=ehost-live header: @attributes: shortDbName: ssf uiTerm: 118569027 longDbName: Social Sciences Full Text (H.W. Wilson) uiTag: AN controlInfo: bkinfo: jinfo: jid: 03014797 EMJ jtl: Journal of Environmental Management issn: 03014797 maglogo: N pubinfo: dt: Dec2016 Part 3 vid: 183 pid: 735 pub: Academic Press Inc. artinfo: ui: 118569027 10.1016/j.jenvman.2016.09.030 ppf: 726 ppct: 7 formats: tig: atl: Process optimization for microcystin-LR degradation by Response Surface Methodology and mechanism analysis in gas–liquid hybrid discharge system. aug: au: Zhang, Yi Wei, Hanyu Xin, Qing Wang, Mingang Wang, Qi Wang, Qiang Cong, Yanqing affil: School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310018, Zhejiang, PR China College of Electronic Information, Hangzhou Dianzi University, Hangzhou, 310018, PR China su: Microcystins Gas-liquid interfaces Response surfaces (Statistics) Liquid chromatography-mass spectrometry Prediction models sug: subj: Microcystins Gas-liquid interfaces Response surfaces (Statistics) Liquid chromatography-mass spectrometry Prediction models keyword: Catalysts addition Degradation pathway Gas–liquid hybrid discharge Microcystin-LR degradation Multivariable optimization Catalysts addition Degradation pathway Gas–liquid hybrid discharge Microcystin-LR degradation Multivariable optimization ab: A gas–liquid hybrid discharge system was applied to microcystin-LR (MC-LR) degradation. MC-LR degradation was completed after 1 min under a pulsed high voltage of 16 kV, gas–liquid interface gap of 10 mm and oxygen flow rate of 160 L/h. The Box–Behnken Design was proposed in Response Surface Methodology to evaluate the influence of pulsed high voltage, electrode distance and oxygen flow rate on MC-LR removal efficiency. Multiple regression analysis, focused on multivariable factors, was employed and a reduced cubic model was developed. The ANOVA analysis shows that the model is significant and the model prediction on MC-LR removal was also validated with experimental data. The optimum conditions for the process are obtained at pulsed voltage of 16 kV, gas-liquid interface gap of 10 mm and oxygen flow rate of 120 L/h with ta removal efficiency of MC-LR of 96.6%. The addition of catalysts (TiO 2 or Fe 2+ ) in the gas–liquid hybrid discharge system was found to enhance the removal of MC-LR. The intermediates of MC-LR degradation were analyzed by liquid chromatography/mass spectrometry. The degradation pathway proposed envisaged the oxidation of hydroxyl radicals and ozone, and attack of high-energy electrons on the unsaturated double bonds of Adda and Mdha, with MC-LR finally decomposing into small molecular products. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: N holdings: @attributes: islocal: N |
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