Oxidation of bisphenol A by UV/S2O82- : comparison with UV/H2O2

Title
Oxidation of bisphenol A by UV/S2O82- : comparison with UV/H2O2
Authors
윤성환정성필이석헌
Keywords
endocrine disrupting chemical (EDC); bisphenol A (BPA); UV/S2O82-; UV/H2O2; SO4-·radical; OH·radical
Issue Date
2012-01
Publisher
Environmental technology
Citation
VOL 33, NO 1, 123-128
Abstract
UV/S2O82- process was applied to decompose bisphenol A (BPA), which is a representative endocrine disrupting chemical (EDC). The BPA degradation efficiency by UV/S2O82- was increased by increasing S2O82- concentration or decreasing BPA concentration. The presence of humic acid (HA) caused an inhibitory effect. The BPA oxidation rate by UV/S2O82- was increased in the following order: neutral pH (pHi=7) < acidic pH (pHi=4) < basic pH (pHi=10). The main oxidizing species in the UV/S2O82- system was sulfate radical (SO4-&#8226;), whereas the main oxidizing species in the UV/H2O2 system was OH radical (OH&#8226;). Compared with UV/H2O2, the UV/S2O82- process showed higher performance for not only BPA degradation but also its mineralization, which means that SO4-&#8226; is a more effective oxidant for BPA than OH&#8226; radical. The results shown in this study imply that the SO4-&#8226;-based UV/S2O82- process can be an excellent alternative process for the widely-used UV/H2O2 process with higher remediation performance.
URI
http://pubs.kist.re.kr/handle/201004/39578
ISSN
0959-3330
Appears in Collections:
KIST Publication > Article
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