Fluorescent natural organic matter fractions responsible for ultrafiltration membrane fouling: Identification by adsorption pretreatment coupled with parallel factor analysis of excitation-emission matrices
Fluorescent natural organic matter fractions responsible for ultrafiltration membrane fouling: Identification by adsorption pretreatment coupled with parallel factor analysis of excitation-emission matrices
复制标题
导致超滤膜污染的荧光天然有机物组分：通过吸附预处理结合激发发射矩阵的平行因子分析进行识别
DOI：
10.1016/j.memsci.2014.03.071
复制
发表时间：
2014-08-15
影响因子：
9.5
通讯作者：
Li, Guibai
中科院分区：
文献类型：
--
作者：
Shao, Senlin;Liang, Heng;Li, Guibai
针对给定的原水和膜，提出了一种利用吸附预处理结合激发 - 发射矩阵平行因子分析（PARAFAC - EEMs）的新方法，以快速确定荧光天然有机物（NOM）组分在超滤（UF）膜污染中所起的作用。在原水吸附过程中采用了两种阴离子交换树脂、三种聚合物树脂以及一种具有不同吸附特性的粉末活性炭（PAC）。吸附预处理使荧光NOM的矩阵发生了显著变化，迅速使具有相同来源成分的荧光NOM呈现出多样性。采用PARAFAC - EEMs来表征吸附过程中荧光NOM的变化，进而能够将荧光NOM组分与后续超滤试验中的膜污染相关联。结果表明，对于松花江水和聚偏氟乙烯（PVDF）超滤膜（立升，中国），通过PARAFAC分析得到了三个具有统计学意义的荧光组分（分别标记为C1、C2和C3），其中鉴定出两种类腐殖质（C1和C2）组分和一种类蛋白质（C3）组分。总污染和不可逆污染与C3的最大荧光强度（F - max）高度相关，而与C1和C2的F - max相关性较差，这表明C3可作为超滤膜污染的一个指标。此外，通过多元线性回归分析，C1、C2和C3对超滤膜的不可逆污染具有相当大的协同贡献。这些结果有望为超滤膜污染的监测和控制提供重要启示。（C）2014爱思唯尔B.V.版权所有。
A novel approach using adsorption pretreatment coupled with parallel factor analysis of excitation-emission matrices (PARAFAC-EEMs) was proposed to rapidly identify the role of fluorescent natural organic matter (NOM) fractions in ultrafiltration (UF) membrane fouling for given feed water and membrane. Two anion exchange resins, three polymeric resins and a powdered activated carbon (PAC) with diverse adsorption characteristics were adopted in the adsorption of raw water. The matrix of fluorescent NOM was substantially changed by the adsorption pretreatment, which rapidly enabled a diversity of fluorescent NOM with the components of an identical origin. PARAFAC-EEMs were employed to characterize the variation of fluorescent NOM during the adsorption, which in turn allowed to correlate the fluorescent NOM components with the membrane fouling in the following UF test. The results showed that, for the Songhua River water and PVDF UF membrane (Litree, China), three statistically significant fluorescent components (arbitrarily labeled C1, C2, andC3) were obtained through PARAFAC analysis, in which two humic-like (C1 and C2) and one protein-like (C3) components were identified. Total and irreversible fouling were highly correlated with the maximum fluorescence intensity (F-max) of C3, while poorly correlated with the F-max of C1 and C2, suggesting that C3 can act as an indicator for th e UF membrane fouling. Moreover, C1, C2 and C3 have a considerable synergistic contribution to the irreversible fouling of the UF membrane with the analysis of multiple linear regression. These results are expected to provide important implications for monitoring and controlling UF membrane fouling. (C) 2014 Elsevier B.V. All rights reserved.