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RISS 인기검색어
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- 저자 : Rayaroth, Manoj P. (검색결과 1 건)
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Rayaroth, Manoj P.,Lee, Chung-Seop,Aravind, Usha K.,Aravindakumar, Charuvila T.,Chang, Yoon-Seok Elsevier 2017 CHEMICAL ENGINEERING JOURNAL -LAUSANNE- Vol.315 No.-
<P><B>Abstract</B></P> <P>Implications of sulfidized Fe<SUP>0</SUP> (nFe/FeS) for the abatement of pollutants of various categories are widely established. In this study, degradation of one of the major organic pollutants, benzoic acid (BA), has been performed using persulfate activated with nFe/FeS. Complete degradation of BA and its transformed product, hydroxybenzoic acid, was observed within 6min. When the degradation was performed at alkaline pH, the degradation decreased to 8% in the case of Fe<SUP>0</SUP>, but nFe/FeS still showed 100% degradation after 60min. Iron dissolution and persulfate decomposition in the presence of scavengers showed that both sulfate and hydroxyl radicals were involved in the Fe<SUP>0</SUP>-persulfate system and that the hydroxyl radicals were the major species in the nFe/FeS-persulfate system. The major degradation pathway of benzoic acid was hydroxylation followed by complete mineralization, as supported by the practical removal of total organic carbons (more than 75% within 15min). The observed results are promising in using persulfate activated by nFe/FeS for the remediation of various micro-pollutants from a multitude of water sources.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Sulfidized Fe<SUP>0</SUP> (nFe/FeS)-activated persulfate is reported here for the first time. </LI> <LI> Fast degradation of benzoic acid was observed using nFe/FeS-activated persulfate. </LI> <LI> The degradation efficiency followed the order of nFe/FeS>Fe<SUP>0</SUP> ≫>Fe<SUP>2+</SUP>. </LI> <LI> nFe/FeS is more useful in a wide range of pH compared with Fe<SUP>0</SUP>. </LI> <LI> Better mineralization was found as another advantage of nFe/FeS. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
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