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dc.contributor.authorZhang, Y
dc.contributor.authorTran, HP
dc.contributor.authorDu, X
dc.contributor.authorHussain, I
dc.contributor.authorHuang, S
dc.contributor.authorZhou, S
dc.contributor.authorWen, W
dc.date.accessioned2017-07-09T22:17:18Z
dc.date.available2017-07-09T22:17:18Z
dc.date.issued2017
dc.identifier.issn1385-8947
dc.identifier.doi10.1016/j.cej.2016.09.104
dc.identifier.urihttp://hdl.handle.net/10072/341626
dc.description.abstractIn recent years, persulfate activation systems have received increasing attention due to their high oxidation reactivity when removing environmental pollutants. Pyrite, the most common metal sulfide on Earth’s surface, can supply abundant Fe2+ for persulfate activation. The role of the generated reactive oxygen species (ROS) in persulfate-pyrite systems however, is not fully understood. In this study, batch experiments were used to investigate p-chloroaniline (PCA) degradation by a pyrite-persulfate system. The effects of pyrite dosage, pH, temperature, air conditions (aerobic vs. anaerobic) and pyrite particle size on PCA degradation were examined. Radical detection was conducted using electron paramagnetic resonance (EPR) methods. Results from the EPR spectra indicated that PCA degradation was achieved by sulfate radical and hydroxyl radical oxidation. Aerobic conditions were more beneficial to PCA degradation than anaerobic conditions due to the generated superoxide radicals (O2radical dot−) that activated the persulfate to produce more sulfate radicals (SO4radical dot−). PCA degradation also increased with higher pyrite doses and under acidic conditions (pH 3.0 and 5.0). PCA was removed completely at pH 3.0 after 60 min. Temperature increase from 10 to 50 °C significantly promoted PCA degradation. These findings provide new understanding of the mechanism involved in pyrite activation of persulfate which can be used to improve PCA degradation by pyrite-persulfate systems.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherElsevier
dc.relation.ispartofpagefrom1112
dc.relation.ispartofpageto1119
dc.relation.ispartofjournalChemical Engineering Journal
dc.relation.ispartofvolume308
dc.subject.fieldofresearchChemical Engineering not elsewhere classified
dc.subject.fieldofresearchChemical Engineering
dc.subject.fieldofresearchCivil Engineering
dc.subject.fieldofresearchEnvironmental Engineering
dc.subject.fieldofresearchcode090499
dc.subject.fieldofresearchcode0904
dc.subject.fieldofresearchcode0905
dc.subject.fieldofresearchcode0907
dc.titleEfficient pyrite activating persulfate process for degradation of p-chloroaniline in aqueous systems: A mechanistic study
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.hasfulltextNo Full Text
gro.griffith.authorWen, William Y.


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