期刊
CHEMOSPHERE
卷 221, 期 -, 页码 314-323出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2019.01.036
关键词
Bisphenol M; Peroxymonosulfate; Zero-valent iron; Kinetics; Products
资金
- National Natural Science Foundation, China [21607073, 21577063]
- Natural Science Foundation of Jiangsu Province, China [BK20160651]
- Major Science and Technology Program for Water Pollution Control and Treatment, China [2017ZX07301002-03]
- National Key Program for the Introduction of Renowned Overseas Professors, China [MS2017NJDX017]
In the present work, we first examined the performance of zero-valent iron (Fe-0) activated peroxymonosulfate (PMS) for the removal of that bisphenol M (BPM). In 90 min, 95.9 +/- 1.0% of BPM (initial concentration of 10 mu M) could be removed in the optimal reaction conditions: [BPM](0):[PMS](0)=1:40 (molar ratio), [PMS](0):[Fe-0](0) = 1:3 (molar ratio), pH = 8.0 (maintained by 0.1 M phosphate buffer solution), T= 35 degrees C. Common environmental ions like HCO3-, Cl-, NO3- accelerated BPM degradation while NH4+ hindered it. In radical quenching tests, sulfate radicals (SO4 center dot-) were found to play a dominant role in BPM degradation, while hydroxyl radicals (OH) were also detected. By high-performance liquid chromatography-tandem mass spectrometry analysis, 13 products of BPM including small molecules, oligomers and hydroxylated derivatives were identified, and five possible degradation pathways were then proposed. The predicted acute toxicity of the reaction products was reduced after BPM was treated by Fe-0/PMS. All these results prove that Fe/PMS is an efficient, convenient, and environmentally friendly treatment method for the removal of BPM. (C) 2019 Elsevier Ltd. All rights reserved.
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