Characterization of fluorescence foulants on ultrafiltration membrane FA using front-face excitation-emission matrix (FF-EEM) spectroscopy: Fouling evolution and mechanism analysis
Characterization of fluorescence foulants on ultrafiltration membrane FA using front-face excitation-emission matrix (FF-EEM) spectroscopy: Fouling evolution and mechanism analysis
复制标题
使用正面激发发射矩阵 (FF-EEM) 光谱表征超滤膜 FA 上的荧光污垢：污垢演变和机理分析
DOI：
10.1016/j.watres.2018.10.041
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发表时间：
2019
期刊：
影响因子：
12.8
通讯作者：
Liang Heng
中科院分区：
文献类型：
--
作者：
Yu Huarong;Wu Zijian;Zhang Xiaolei;Qu Fangshu;Wang Peng;Liang Heng
了解膜污染的行为和机理是膜污染控制的关键。本研究采用一种新的荧光正面激发-发射矩阵（FF-EEM）方法来表征沉积在膜表面的荧光污染物。建立了蛋白质和腐殖酸在超滤膜上沉积的定量方法。利用FF-EEM和液体EEM结合质量平衡计算，对模型污染物（牛血清白蛋白（BSA）和腐殖酸（HA））和废水出水有机物（EfOM）在超滤过程中沉积在膜表面的污染物进行了定量分析。利用FF-EEM得到的污染物质量数据进一步分析了超滤过程中的污染机理。基于FF-EEM的方法比基于液体EEM的方法更准确，因为基于FF-EEM的方法避免了与基于液体EEM的方法相关的问题（例如质量平衡计算中的误差传播和内部过滤器校正的无效）。结垢阻力与结垢物的数量没有很好的相关性，因为主要的结垢机理而不是结垢物的质量主要决定了结垢的程度。实验结果表明，FF-EEM可以作为研究超滤过程中膜污染演化和膜污染机理的有力工具。
The understanding of fouling behavior and mechanism is critical for fouling control in membrane processes. This study adopted a novel fluorescence front-face excitation-emission matrix (FF-EEM) approach to characterize the fluorescence foulants deposited on membrane surface. Methods for quantifying protein and humic substances deposited on ultrafiltration (UF) membrane were established. Foulants deposited on the membrane surface during the UF of model foulants (bovine serum albumin (BSA) and humic acids (HA)) and wastewater effluent organic matter (EfOM) were quantified using the FF-EEM and liquid EEM coupled with mass balance calculation. The foulants mass data obtained by FF-EEM were further used to analyze fouling mechanism involved in UF. The FF-EEM based method was more accurate than the liquid EEM based method, as the problems associated with liquid EEM based method (such as the error propagation in the mass balance calculation and the ineffectiveness of inner filter correction) were avoided in FF-EEM based method. The fouling resistance did not correlate well with the amount of foulants, as the major fouling mechanism instead of the mass of foulants mainly determined the extent of fouling. This work demonstrated FF-EEM could be a powerful tool for investigating fouling evolution and fouling mechanism in UF process.