Application of ozone, UV and ozone/UV processes to reduce diethyl phthalate and its estrogenic activity

Oh, Byung Soo; Jung, Yeon Jung; Oh, Young Jin; Yoo, Young Sook; Kang, Joon Wun

doi:10.1016/j.scitotenv.2006.02.051

Cited by 76 publications

(33 citation statements)

References 26 publications

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“…EDCs can be degraded by ozone/UV treatment (Oh et al, 2006) or by bioremediation using various bacteria and fungi (Oshiman et al, 2007); however, lignin degrading white-rot basidiomycetes are the most promising candidates for the remediation of various EDCs. White-rot basidiomycetes have enzyme systems that enable the degradation of lignocellulose materials, and laccase, lignin peroxidase and manganese peroxidase are the key enzymes involved in these systems.…”

mentioning

confidence: 99%

Enhanced expression of laccase during the degradation of endocrine disrupting chemicals in Trametes versicolor

et al. 2008

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A putative laccase cDNA from a white-rot basidiomycete, Trametes versicolor, that consisted of 1,769 nucleotides was cloned using the rapid amplification of cDNA ends (RACE)-PCR method. The deduced amino acid sequence had 4 putative copper binding regions, which are common to fungal laccases. In addition, the sequence was 57-97% homologous to sequences of other T. versicolor laccases. Additionally, the expression of laccase and manganese peroxidase in this fungus were both greatly increased under degrading conditions for bisphenol A, nonylphenol and two phthalic esters (benzylbutylphthalate and diethylphthalate), all of which are reportedly endocrine disrupting chemicals (EDCs). Furthermore, the estrogenic activities of the EDCs also decreased rapidly during incubation when examined in a two-hybrid yeast system. Finally, kojic acid inhibited the removal of estrogenic activities generated by bisphenol A and nonylphenol, which confirmed that laccase was involved in the degradation of EDCs in T. versicolor.

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mentioning

confidence: 99%

Enhanced expression of laccase during the degradation of endocrine disrupting chemicals in Trametes versicolor

et al. 2008

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“…The ozone reactor system and analysis method of DEP are described in detail elsewhere (Oh et al 2006). Briefly, the net ozone dose was set to 1.5 and 4 mg l 21 min with the flow rate fixed at 0.5 l min 21 for DEP oxidation study.…”

Section: Ozonation Experiments For Depmentioning

confidence: 99%

“…A previous study (Oh et al 2006) investigated the removal efficiency of DEP and its estrogenic efficiency by ozone, UV and combined ozone/UV processes. Of the processes tested, the ozone/UV process showed the highest efficiency for the removal of both DEP and its estrogenic activity.…”

Section: Introductionmentioning

confidence: 99%

The degradation of diethyl phthalate (DEP) during ozonation: oxidation by-products study

Jung

Oh²,

Kim³

et al. 2009

Journal of Water and Health

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The degradation of diethyl phthalate (DEP) in an aqueous solution during ozonation was investigated by identifying the oxidation intermediates using GC-MS. The experiments were carried out in semi-batch mode with a 1.5 mg l 21-min ozone dose. The proposed degradation pathways were divided into hydrolysis of the aliphatic chain (pathway (A)) and hydroxylation resulting from zOH attack in the aromatic ring (pathway (B)). With increasing ozone dose, the aromatic ring of DEP was opened and acidic compounds, such as malonic acid, succinic acid and glutaric acid were formed. In addition, the ozonation of DEP for 18 min induced hydrogen peroxide (H 2 O 2 ) generation at levels six times higher than pure water. Of the intermediates indentified, phthalic acid (PA) and phthalic anhydride (PAH) enhanced the degradation of DEP by promoting ozone decomposition.

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“…As representative contamination sites, the concentration of DEP in Tennessee River (Unites States), Rhine River (Netherlands), and Rivers Irwell near Manchester (United Kingdom) were 11.2, 0.45 and 0.4~0.6 µg L -1 , respectively (Chen et al, 2005). What' more, Oh et al (2006) reported that phthalates are the main proportion (53%) of micropollutants detected in the Han River, which provides approximately 70% of the drinking water in South Korea. Because of the frequent dermal exposure of humans to the chemical and its toxicity, it is urgent to take some effective measures to maintain the safety of drinking water (Colon et al, 2000;Miodovnik et al, 2011;Shanna et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

“…For some examples, Xu et al (2007) investigated the effect of various factors such as H 2 O 2 dose, UV intensity, and water temperature on the oxidative kinetics of DEP in the UV/H 2 O 2 process. Oh et al (2006) monitored the difference of degradation efficiency with application of O 3 , UV and UV/O 3 process. As an emerging technology of AOPs, ultrasound has also attracted researcher's interest because of its application for wide range of contaminants.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Ultrasonic Oxidation of Diethyl Phthalate Using Box-Behnken Design with Response Surface Methodology

Cui¹,

Jang²,

Kang³

et al. 2013

Journal of Korean Society of Hazard Mitigation

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The kinetic constant of diethyl phthalate (DEP) oxidized by ultrasound was measured as a function of ultrasound power density, Cl -concentration and solution temperature. The ultrasonic oxidation kinetic of DEP could be described by the pseudo-first-order) was identified using Box-Behnken Design coupled with Response Surface Methodology. The final equation for describing the kinetic constant k is as follows: Analysis of variance (ANOVA) tests showed that the second-order polynomial regression model could properly interpret the experimental data with a high determination coefficient (R 2 , 0.998). The P-value of the model was 0.0001 which is less than 0.05, implying that the model is significant.Besides, the response surface showed that ultrasound power density gave much more effect than another two factors (temperature and Cl -ion concentration), which provides a possible evidence for the future design.

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Application of ozone, UV and ozone/UV processes to reduce diethyl phthalate and its estrogenic activity

Cited by 76 publications

References 26 publications

Enhanced expression of laccase during the degradation of endocrine disrupting chemicals in Trametes versicolor

Enhanced expression of laccase during the degradation of endocrine disrupting chemicals in Trametes versicolor

The degradation of diethyl phthalate (DEP) during ozonation: oxidation by-products study

Evaluation of Ultrasonic Oxidation of Diethyl Phthalate Using Box-Behnken Design with Response Surface Methodology

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