期刊
JOURNAL OF MEMBRANE SCIENCE
卷 312, 期 1-2, 页码 66-75出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.memsci.2007.12.039
关键词
bisphenol-A; iron(III)-tetrasulfophthalocyanine; endocrine disrupting chemicals; nanofiltration; hybrid system
资金
- National Research Foundation of Korea [과C6A1903, R01-2005-000-10517-0] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Endocrine disrupting chemicals (EDCs) have received substantial attention over the past decade because of the adverse effects of these chemicals on human health. In the present study, a novel hybrid system combining nanofiltration (NF) with homogeneous catalytic oxidation was developed for the effective degradation of EDCs in sources of drinking water. Bisphenol-A (BPA) was chosen as a model EDC and iron (III)-tetrasulfophthalocyanine (Fe(III)-TsPc) was used as a homogeneous metal catalyst to degrade BPA in the presence of hydrogen peroxide. In batch tests, it was confirmed that monomeric Fe(Ill)-TsPc was generated under weakly acidic conditions (pH<4.5) and possessed remarkable catalytic activity-more than 90% of BPA was decomposed within 3 min at PH 4.5. Also, based on GUMS and LC/MS, compounds such as p-benzoquinone, 4-isopropenyl phenol, BPA-o-quinone, and 4-hydroxyphenyl-2-propanol were identified as reaction intermediates and/or by-products of BPA oxidation, which could further be converted to low molecular weight organic acids. The NF-hybrid system showed higher removal efficiency of BPA than the NF-only system (95% vs. 72%) because BPA in the retentate was continuously decomposed by catalytic oxidation. Permeate flux was slightly lower, but ion rejection was higher, in the NF-hybrid system than in the NF-only system due to precipitation of Fe(Ill)-TsPc on the membrane surface in the NF-hybrid system. (C) 2007 Elsevier B.V. All rights reserved.
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