Irreversible membrane fouling during ultrafiltration of surface water
Irreversible membrane fouling during ultrafiltration of surface water
复制标题
DOI：
10.1016/j.watres.2004.05.007
复制
发表时间：
2004-08-01
期刊：
影响因子：
12.8
通讯作者：
Ohkuma, N
中科院分区：
文献类型：
--
作者：
Kimura, K;Hane, Y;Ohkuma, N
为了更有效地使用膜，控制不可逆的膜污染是重要的，不可逆的膜污染可以被定义为需要化学试剂来减轻的污染。在这项研究中，不可逆的污染所造成的成分在地表水进行了调查，基于长期的中试规模的研究。所采用的膜是由聚砜制成的低压疏水超滤（UF）膜，其具有750，000Da的截留分子量。检查各种化学试剂以克服通过5个月的连续过滤而形成的不可逆污染。在所测试的清洗剂中，碱（NaOH）和氧化剂（NaClO）在膜渗透性恢复方面表现出较好的性能，这表明有机物在本研究中的不可逆污染的发展中起着重要作用。采用化学分析、吸附分馏、荧光激发发射矩阵（EEM）和傅里叶变换红外（FTIR）光谱分析等方法研究了造成不可逆污染的有机物组分。所有的分析表明，多糖类有机物是负责的不可逆污垢的演变。除有机物外，铁和锰也对不可逆结垢有一定的贡献。(C)2004 Elsevier Ltd.保留所有权利。
For more efficient use of membranes, the control of irreversible membrane fouling, which can be defined as fouling requiring chemical reagents to be mitigated, is of importance. In this study, irreversible fouling caused by constituents in surface water was investigated, based on a long-term pilot scale study. The membrane employed was a low-pressure hydrophobic ultrafiltration (UF) membrane made of polysulfone and having a molecular weight cutoff of 750,000 Da. Various chemical reagents were examined to overcome the irreversible fouling that had developed through 5 months of continuous filtration. Among the tested cleaning reagents, alkaline (NaOH) and oxidizing reagent (NaClO) showed good performance in the restoration of membrane permeability, which implied that organic matter played an important role in the development of the irreversible fouling in this study. Chemical analysis, adsorptive fractionation methods, fluorescence excitation-emission matrix (EEM) and Fourie-transformed infra-red (FTIR) spectra analysis were applied to elucidate which fraction of organic matter caused the irreversible fouling. All of the analysis indicated that polysaccharide-like organic matter was responsible for the evolution of the irreversible fouling. In addition to organic matter, presumably iron and manganese also contributed to the irreversible fouling to some extent. (C) 2004 Elsevier Ltd. All rights reserved.