期刊
WATER RESEARCH
卷 93, 期 -, 页码 296-305出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2016.02.035
关键词
Polyacrylonitrile nanofibers; Iron (II) phthalocyanine; Hydroxyl radicals; Recalcitrant pollutants; Transformation products; Degradation pathways
资金
- National Natural Science Foundation of China [51133006, 51103133]
- Textile Vision Science Education Fund
- 521 Talent Project of ZSTU
- Zhejiang Provincial Natural Science Foundation of China [LY14E030013]
- Public Welfare Technology Application Research Project of Zhejiang Province [2015C33018]
Iron (II) phthalocyanine (FePc) molecules were isolated in polyacrylonitrile (PAN) nanofibers by electrospinning to prevent the formation of dimers and oligomers. Carbamazepine (CBZ) and Rhodamine B (RhB) degradation was investigated during a Fenton-like process with FePc/PAN nanofibers. Classical quenching tests with isopropanol and electron paramagnetic resonance tests with 5,5-dimethyl-pyrroline-oxide as spin-trapping agent were performed to determine the formation of active species during hydrogen peroxide (H2O2) decomposition by FePc/PAN nanofibers. After eight recycles for CBZ degradation over the FePc/PAN nanofibers/H2O2 system, the removal ratios of CBZ remained at 99%. Seven byproducts of RhB and twelve intermediates of CBZ were identified using ultra-performance liquid chromatography and high-resolution mass spectrometry. Pathways of CBZ and RhB degradation were proposed based on the identified intermediates. As the reaction proceeded, all CBZ and RhB aromatic nucleus intermediates decreased and were transformed to small acids, but also to potentially toxic epoxide-containing intermediates and acridine, because of the powerful oxidation ability of center dot OH in the catalytic system. (C) 2016 Elsevier Ltd. All rights reserved.
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