Journal
WATER SCIENCE AND TECHNOLOGY
Volume 67, Issue 10, Pages 2141-2147Publisher
IWA PUBLISHING
DOI: 10.2166/wst.2013.117
Keywords
adsorption; advanced oxidation process; butylparaben; kinetic; photocatalysis; TiO2-supported
Funding
- National Sciences and Engineering Research Council of Canada
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The present work evaluates the potential of the photocatalysis (PC) process for the degradation of butylparaben (BPB). Relatively high treatment efficiency was achieved by comparison to photochemical process. Prior to photocatalytic degradation, adsorption (AD) of BPB occurred on the titanium dioxide (TiO2)-supported catalyst. AD was described by Langmuir isotherm (K-L = 0.085 L g(-1), q(m) = 4.77 mg g(-1)). The influence of angle of inclination of the reactor, pH, recirculation flow rate and initial concentration of BPB were investigated. The PC process applied under optimal operating conditions (recirculation flow rate of 0.15 L min(-1), angle of inclination of 15 degrees, pH = 7 and 5 mg L-1 of BPB) is able to oxidize 84.9-96.6% of BPB and to ensure around 38.7% of mineralization. The Langmuir-Hinshelwood kinetic model described well the photocatalytic oxidation of BPB (k = 7.02 mg L-1 h(-1), K = 0.364 L mg(-1)).
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