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Membranes (Basel)

Title:		Pollution and Cleaning of PDMS Pervaporation Membranes after Recovering Ethyl Acetate from Aqueous Saline Solutions
Author(s):		Sun X; Pan Y; Shen C; Zuo C; Ding X; Liu G; Xing W; Jin W;
Address:		"State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, 30 Puzhou Road(S), Nanjing 211816, China. NanJing Jiusi High-Tech Co., Ltd., 1 Yuansi Road, Nanjing 211000, China"
Journal Title:		Membranes (Basel)
Year:		2022
Volume:		20220406
Issue:		4
Page Number:		-
DOI:		10.3390/membranes12040404
ISSN/ISBN:		2077-0375 (Print) 2077-0375 (Electronic) 2077-0375 (Linking)
Abstract:		"The removal of volatile organic compounds (VOCs) from wastewater containing nonvolatile salts has become an important and interesting case of the application of the pervaporation (PV) process. The aim of this study was to evaluate the influence of salts on the PV removal of ethyl acetate from wastewater using a polydimethylsiloxane (PDMS) membrane. The fouled membrane was then characterized via scanning electron microscopy-energy-dispersive X-ray analysis (SEM-EDX) to investigate salt permeation. The membrane backflushing process was carried out by periodically flushing the permeate side of the tubular membrane. The results demonstrated that salts (NaCl and CaCl(2)) could permeate through the PDMS membrane and were deposited on the permeate side. The presence of salts in the feed solution caused a slight increase in the membrane selectivity and a decrease in the permeate flux. The flux decreased with increasing salt concentration, and a notable effect occurred at higher feed-salt concentrations. A permeate flux of up to 98.3% of the original flux was recovered when the permeation time and backflushing duration were 30 and 5 min, respectively, indicating that the effect of salt deposition on flux reduction could be mitigated. Real, organic, saline wastewater was treated in a pilot plant, which further verified the feasibility of wastewater PV treatment"
Keywords:		backflushing ethyl acetate pervaporation salt wastewater;
Notes:		"PubMed-not-MEDLINESun, Xuefei Pan, Yang Shen, Chunxiang Zuo, Chengye Ding, Xiaobin Liu, Gongping Xing, Weihong Jin, Wanqin eng Switzerland 2022/04/22 Membranes (Basel). 2022 Apr 6; 12(4):404. doi: 10.3390/membranes12040404"