聚氯乙烯中空纤维膜超滤疏水性溶解有机物的污染与清洗特性

Fouling and cleaning characteristics of ultrafiltration of hydrophobic dissolved organic matter by a polyvinyl chloride hollow fiber membrane.

作者信息

Guo Xiaoyan, Gao Wei, Li Jihui, Hu Wanli

机构信息

Key Lab of Pollution Processes and Environmental Criteria, Nankai Univ., Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin, China.

出版信息

Water Environ Res. 2009 Jun;81(6):626-32. doi: 10.2175/106143008x370368.

DOI:10.2175/106143008x370368

PMID:19623742

Abstract

Ultrafiltration membrane fouling is a significant problem in drinking water treatment. Many researchers believe that hydrophobic natural organic matter is the main foulant. In this research, fulvic acid, tannin, and aniline were used to represent hydrophobic acid, neutral, and base, respectively, to investigate modified polyvinyl chloride ultrafiltration membrane fouling characteristics. Four kinds of cleaning methods were used in this study: flushing, backwashing, flushing and backwashing, and chemical cleaning with 0.5% sodium hydroxide. Each was performed on the three hydrophobic dissolved organic matters (acid, neutral, and base) to identify the fouling mechanisms of polyvinyl chloride ultrafiltration membrane. Results showed that hydrophobic base fouled membranes the most and hydrophobic acid the least based on cleaning difficulty.

摘要

超滤膜污染是饮用水处理中的一个重大问题。许多研究人员认为，疏水性天然有机物是主要的污染物。在本研究中，分别使用富里酸、单宁和苯胺来代表疏水性酸、中性物质和碱，以研究改性聚氯乙烯超滤膜的污染特性。本研究采用了四种清洗方法：冲洗、反冲洗、冲洗和反冲洗，以及用0.5%氢氧化钠进行化学清洗。每种方法都应用于三种疏水性溶解有机物（酸、中性物质和碱），以确定聚氯乙烯超滤膜的污染机制。结果表明，基于清洗难度，疏水性碱对膜的污染最为严重，而疏水性酸对膜的污染最轻。