TY - JOUR
T1 - H2O2/UV-C oxidation of potential endocrine disrupting compounds
T2 - A case study with dimethyl phthalate
AU - Olmez-Hanci, Tugba
AU - Imren, Ceren
AU - Arslan-Alaton, Idil
AU - Kabdaşlino, Işinok
AU - Tünay, Olcay
PY - 2009
Y1 - 2009
N2 - This paper discusses the feasibility of the ultraviolet radiation-hydrogen peroxide (H2O2/UV-C) process as an advanced oxidation process (AOP) in the treatment of endocrine disrupting compounds (EDC). Dimethyl phthalate (DMP) was chosen as the model compound owing to its classification as an EDC. Experiments have been conducted at various pH values (3.5, 6.0 and 9.0) and initial H2O2 concentrations (0-60 mM) in a batch reactor equipped with a low-pressure mercury UV-C lamp in order to evaluate the optimal operation conditions of the H2O2/UV-C process. The most effective pH value for the degradation of DMP by H2O 2/UV-C treatment was found as 6.0. DMP abatement increased with increasing H2O2 concentrations from 5 to 30 mM. Further increase in initial H2O2 concentration, however, reduced both the rate and extent of DMP removal as well as chemical oxygen demand (COD) and total organic carbon (TOC) removals. A simple kinetic model was proposed for DMP, COD and TOC abatements confirmed pseudo-first-order reaction. The electrical energy per order (EE/O) values for DMP oxidation and TOC mineralization were calculated as 3.3 and 19 kWh m-3 order -1 respectively for the optimum treatment conditions (H 2O2,o = 30 mM, pHo = 6.0, DMPo= 100 mg L-1). Inhibition of oxygen uptake rate by activated sludge (ISO 8192) was evaluated as a tool for assessing the acute toxicity of untreated and H2O2/UV-C treated DMP. According to the results obtained in this work, the use of the H2O2/UV-C process is recommended to achieve a complete DMP oxidation and high mineralization degree of aqueous solution of DMP.
AB - This paper discusses the feasibility of the ultraviolet radiation-hydrogen peroxide (H2O2/UV-C) process as an advanced oxidation process (AOP) in the treatment of endocrine disrupting compounds (EDC). Dimethyl phthalate (DMP) was chosen as the model compound owing to its classification as an EDC. Experiments have been conducted at various pH values (3.5, 6.0 and 9.0) and initial H2O2 concentrations (0-60 mM) in a batch reactor equipped with a low-pressure mercury UV-C lamp in order to evaluate the optimal operation conditions of the H2O2/UV-C process. The most effective pH value for the degradation of DMP by H2O 2/UV-C treatment was found as 6.0. DMP abatement increased with increasing H2O2 concentrations from 5 to 30 mM. Further increase in initial H2O2 concentration, however, reduced both the rate and extent of DMP removal as well as chemical oxygen demand (COD) and total organic carbon (TOC) removals. A simple kinetic model was proposed for DMP, COD and TOC abatements confirmed pseudo-first-order reaction. The electrical energy per order (EE/O) values for DMP oxidation and TOC mineralization were calculated as 3.3 and 19 kWh m-3 order -1 respectively for the optimum treatment conditions (H 2O2,o = 30 mM, pHo = 6.0, DMPo= 100 mg L-1). Inhibition of oxygen uptake rate by activated sludge (ISO 8192) was evaluated as a tool for assessing the acute toxicity of untreated and H2O2/UV-C treated DMP. According to the results obtained in this work, the use of the H2O2/UV-C process is recommended to achieve a complete DMP oxidation and high mineralization degree of aqueous solution of DMP.
UR - http://www.scopus.com/inward/record.url?scp=65549120062&partnerID=8YFLogxK
U2 - 10.1039/b817420b
DO - 10.1039/b817420b
M3 - Article
C2 - 19424534
AN - SCOPUS:65549120062
SN - 1474-905X
VL - 8
SP - 620
EP - 627
JO - Photochemical and Photobiological Sciences
JF - Photochemical and Photobiological Sciences
IS - 5
ER -
