Using UV-vis spectral parameters to characterize the cleaning efficacy and mechanism of sodium hypochlorite (NaOCl) on fouled membranes

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• 作者：Minghao Zhouup>aup>up> ; up>up>bup> ; Zhongbo Zhouup>aup>up> ; up>up>bup> ; Fangang Mengup>aup>up> ; up>up>bup>up> ; up>up>mengfg@mail.sysu.edu.cnup>
• 关键词：Chemical cleaning ; Sodium hypochlorite (NaOCl) ; Humic substances (HS) ; Membrane fouling ; UV&ndash ; vis absorbance
• 刊名：Journal of Membrane Science
• 出版年：2017
• 出版时间：1 April 2017
• 年：2017
• 卷：527
• 期：Complete
• 页码：18-25
• 全文大小：1270 K
• 卷排序：527

文摘

-DSlope325–375 is sensitive to changes in HS samples during chlorination. A strong correlation exists between -DSlope325–375 and Fmax obtained from EEM-PARAFAC. XPS reveals the alteration in the hydrophilicity of HS after chlorination. Increasing the chlorine dosage reduces fouling rates and increases HS permeability. -DSlope325–375 can evaluate the NaOCl cleaning efficacy from forward flushing.