Positively charged microporous ceramic membrane for the removal of Titan Yellow through electrostatic adsorption

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• 作者：Xiuting Cheng¹ ; ² ; ^{chengxiuting122@163.com" class="auth_mail" title="E-mail the corresponding author} ; Na Li¹ ; Mengfu Zhu² ; ^{zmf323@163.com" class="auth_mail" title="E-mail the corresponding author} ; Lili Zhang¹ ; ² ; Yu Deng¹ ; Cheng Deng² ; ^{dcnudt@163.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Positively charged ceramic membrane ; Electrostatic adsorption ; Organic dyes ; Wastewater treatment
• 刊名：Journal of Environmental Sciences
• 出版年：2016
• 出版时间：June 2016
• 年：2016
• 卷：44
• 期：Complete
• 页码：204-212
• 全文大小：1152 K

文摘

To develop a depth filter based on the electrostatic adsorption principle, positively charged microporous ceramic membrane was prepared from a diatomaceous earth ceramic membrane. The internal surface of the highly porous ceramic membrane was coated with uniformly distributed electropositive nano-Y₂O₃ coating. The dye removal performance was evaluated through pressurized filtration tests using Titan Yellow aqueous solution. It showed that positively charged microporous ceramic membrane exhibited a flow rate of 421 L/(m²·hr) under the trans-membrane pressure of 0.03 bar. Moreover it could effectively remove Titan Yellow with feed concentration of 10 mg/L between pH 3 to 8. The removal rate increased with the enhancement of the surface charge properties with a maximum rejection of 99.6%. This study provides a new and feasible method of removing organic dyes in wastewater. It is convinced that there will be a broad market for the application of charged ceramic membrane in the field of dye removal or recovery from industry wastewater.