Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/68482
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dc.contributor.authorHuang, S.W.en_US
dc.contributor.authorChiang, P.N.en_US
dc.contributor.authorLiu, J.C.en_US
dc.contributor.authorHung, J.T.en_US
dc.contributor.authorKuan, W.H.en_US
dc.contributor.authorTzou, Y.M.en_US
dc.contributor.authorWang, S.L.en_US
dc.contributor.authorHuang, J.H.en_US
dc.contributor.authorChen, C.C.en_US
dc.contributor.authorWang, M.K.en_US
dc.contributor.authorLoeppert, R.H.en_US
dc.date2012zh_TW
dc.date.accessioned2014-06-11T05:56:52Z-
dc.date.available2014-06-11T05:56:52Z-
dc.identifier.issn0045-6535zh_TW
dc.identifier.urihttp://hdl.handle.net/11455/68482-
dc.description.abstractHumic substances are a major component of soil organic matter that influence the behavior and fate of heavy metals such as Cr(VI), a toxic and carcinogenic element. In the study, a repetitive extraction technique was used to fractionate humic acids (HAs) from a peat soil into three fractions (denoted as F1, F2, and F3), and the relative importance of O-containing aromatic and aliphatic domains in humic substances for scavenging Cr(VI) was addressed at pH 1. Spectroscopic analyses indicated that the concentrations of aromatic C and O-containing functional groups decreased with a progressive extraction as follows: F1 > F2 > F3. Cr(VI) removal by HA proceeded slowly, but it was enhanced when light was applied due to the production of efficient reductants, such as superoxide radical and H2O2, for Cr(VI). Higher aromatic- and O-containing F1 fraction exhibited a greater efficiency for Cr(VI) reduction (with a removal rate of ca. 2.89 mmol g(-1) HA under illumination for 3 h). C-13 NMR and FTIR spectra further demonstrated that the carboxyl groups were primarily responsible for Cr(VI) reduction. This study implied the mobility and fate of Cr(VI) would be greatly inhibited in the environments containing such organic groups. (C) 2012 Elsevier Ltd. All rights reserved.en_US
dc.language.isoen_USzh_TW
dc.relationChemosphereen_US
dc.relation.ispartofseriesChemosphere, Volume 87, Issue 6, Page(s) 587-594.en_US
dc.relation.urihttp://dx.doi.org/10.1016/j.chemosphere.2012.01.010en_US
dc.subjectHumic aciden_US
dc.subjectCr(VI)en_US
dc.subjectReductionen_US
dc.subjectAromatic groupsen_US
dc.subjectOxygen-containing Cen_US
dc.subjectorganic-matteren_US
dc.subjectfulvic-aciden_US
dc.subjectcr(vi) reductionen_US
dc.subjectsorptionen_US
dc.subjectnaphthaleneen_US
dc.subjectsubstancesen_US
dc.subjectadsorptionen_US
dc.subjectcoalen_US
dc.titleChromate reduction on humic acid derived from a peat soil - Exploration of the activated sites on HAs for chromate removalen_US
dc.typeJournal Articlezh_TW
dc.identifier.doi10.1016/j.chemosphere.2012.01.010zh_TW
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