Statistical optimization of active chlorine production from a synthetic saline effluent by electrolysis

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• 作者：Franç ; ois Zaviska^a ; ¹ ; ^{francois.zaviska@ete.inrs.ca} ; Patrick Drogui^a ; ^{patrick.drogui@ete.inrs.ca} ; Gortá ; res Pablo^b ; ² ; ^{pgortare@itson.edu.mx}
• 关键词：Saline effluent ; Seawater ; Electro-oxidation ; Active chlorine ; Experimental design
• 刊名：Desalination
• 出版年：2012
• 期刊代码：24_00119164
• 类别：ce
• 出版时间：15 June, 2012
• 卷：296
• 期：Complete
• 页码：16-23
• 文件大小：756 K

摘要

This study examines the possibility to optimally produce active chlorine from a synthetic concentrate of seawater by electrolysis using an experimental design methodology. Different operating parameters were investigated such as current density, reaction time, hydrochloric acid concentration and chloride ion concentration. Using a 2⁴ factorial matrix, the best performance for active chlorine production (46 mg/l of HClO) was obtained at a current intensity of 1.6 A during 35 min of treatment time in the presence of 0.11 M of H₃O⁺ and 0.8 M of NaCl. The current intensity and treatment time were the main parameters influencing the active chlorine production. Subsequently, a central composite design methodology has been investigated to determine the optimal experimental parameters for chlorine production. The electrolytic cell applied under optimal conditions (at a current intensity of 1.6 A during 27 min in the presence of 0.11 M of NaCl and 0.8 M of H₃O⁺) is able to produce 31 mg/l of chlorine for an energy consumption of 0.54 kWh/m³.