Investigation on removing recalcitrant toxic organic polluters in coking wastewater by forward osmosis

作     者：Zhiqiang Li Lanying Jiang Chongjian Tang Zhiqiang Li;Lanying Jiang;Chongjian Tang

作者机构：School of Metallurgy and EnvironmentCentral South UniversityChangsha 410000China National Engineering Research Center for Control&Treatment of Heavy Metal PollutionChangsha 410000China Key Laboratory of Hunan Province for Water Environment and Agriculture Product SafetyChangsha 410000China 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2020年第28卷第1期

页      面：122-135页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081704[工学-应用化学] 08[工学] 0817[工学-化学工程与技术] 081701[工学-化学工程] 

基　　金：National Natural Science Foundation of China(Project no.21176265) Hunan Provincial Science and Technology Plan(Project no.2014GK3106) 

主　　题：Coke wastewater Organics rejection Forward osmosis Water flux Reverse salt flux 

摘      要：Investigation was made on the efficiency of two commercial membranes in removing via forward osmosis(FO)the low molecular weight organic compounds typical of coking wastewater. The membranes were supplied by Poten and HTI companies. The organics in the simulated coking water were indole and pyrridine. Under FO mode, the rejection to the organics by Poten membrane was around 50%, whereas that for HTI membrane was obviously higher, ranging from 65% to 74%. The response of the two membranes in terms of Water flux and reverse salt flux(RSF) towards changing feed/draw solution(DS) flow rates in FO mode showed similar tendency,but different degree. Generally, the flux in FO using HTI membranes was lower. For HTI membrane, FO operated with pressure retarded osmosis(PRO) mode was also performed and the overall rejection of the organics was slightly lower than that in FO mode. In the long term FO test within 15 days, both Poten and HTI membranes displayed flux reduction and rejection enhancement. But the variation with Poten membrane was much more obvious. Discussion was carried out about the reasons and the mechanisms behind the FO performance difference between two membranes and the variation in flux and rejection with operation conditions. Characterizations by SEM, FTIR, AFM, XRD and XPS were tried to support the proposed explanations.