The degradation of endocrine disruptor di-n-butyl phthalate by UV irradiation: A photolysis and product study

Lau, T. K.; Chu, Wei; Graham, Nigel

doi:10.1016/j.chemosphere.2005.01.022

Cited by 126 publications

(66 citation statements)

References 22 publications

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“…In particular, such as reported in literature, the photodegradation of phthalate esters at 254 nm involves photo-induced decarboxylation, hydroxylation, dealkylation, and scission of C-O, C-C, and O-alkyl bonds [7,30,31].…”

Section: Resultsmentioning

confidence: 73%

“…The main processes which successfully remove and eliminate PAEs from the environmental matrices include: microbiological transformation and degradation, volatilization, photo-oxidation, chemical oxidation, sorption and biological uptake [7,8]. However, some of the PAEs are recalcitrants, and biological processes are not always effective in removing them.…”

Section: Introductionmentioning

confidence: 99%

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Photodegradation of selected phthalates on mural painting surfaces under UV light irradiation

Barreca

Indelicato

Orecchio

et al. 2014

Microchemical Journal

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The esters of phthalic acid are considered as hazardous pollutants due to their mutagenicity, carcinogenicity and are also classified as endocrine disruptor chemicals. Several compounds of this class of substances for decades, and probably even now, were used as softeners in water-based synthetic paintings. Surfaces and structures, such as house walls painted with phthalates based paintings, can be a concern to construction workers engaged in demolition, restore and paint removal activities if they are not protected from hazardous dust inhalation. In this paper we report the results of an investigation about phthalate ester degradation by direct UV irradiation at 254 nm. The results of kinetic parameters for PAE photodegradation are reported and it shows that k values for the single PAEs ranged from 0.221 to 0.737 h −1 . Moreover, the results indicate that photolysis is a successful way to remediate PEAs contaminated on mural painting.

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Section: Resultsmentioning

confidence: 73%

Section: Introductionmentioning

confidence: 99%

Photodegradation of selected phthalates on mural painting surfaces under UV light irradiation

Barreca

Indelicato

Orecchio

et al. 2014

Microchemical Journal

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“…Perez et al [59] and Rodrigues et al [60] applied photocatalysis by TiO2 reagent to paper mill effluents and have obtained reductions of COD between 16% and 40%, which is in accordance with results of this study. Xu et al [53] observed an 80% degradation of BBP from synthetic aqueous solution (1 mg/L) in the optimal photocatalysis conditions (pH = 7, [TiO2] = 2 g/L, t = 120 min) and Lau et al [61] observed a 100% degradation of DBP from synthetic aqueous solution in 90 min, while Chung and Chen [62] observed a 40% to 100% degradation of BEHP from synthetic aqueous solution (25-300 µg/L) in the optimal photocatalysis conditions (pH = 4, [TiO2] = 100 µg/L, t = 150 min).…”

Section: Photocatalysis With Tio 2 Reagentmentioning

confidence: 99%

Comparison of different wastewater treatments for removal of selected endocrine-disruptors from paper mill wastewaters

Balabanič

Hermosilla

Merayo

et al. 2012

Journal of Environmental Science and Health, Part A

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There is increasing concern about chemical pollutants that have the ability to mimic hormones, the socalled endocrine disrupting compounds (EDCs). One of the main reasons for concern is the possible effect of EDCs on human health. EDCs may be released into the environment in different ways, and one of the most significant sources is industrial wastewater. The main objective of this research was to evaluate the treatment performance of different wastewater treatment procedures (biological treatment, filtration, advanced oxidation processes) for the reduction of chemical oxygen demand and seven selected EDCs (dimethyl phthalate, diethyl phthalate, dibutyl phthalate, benzyl butyl phthalate, bis(2-ethylhexyl) phthalate, bisphenol A and nonylphenol) from wastewaters from a mill producing 100% recycled paper. Two pilot plants were running in parallel and the following treatments were compared: (i) anaerobic biological treatment followed by aerobic biological treatment, ultrafiltration and reverse osmosis (RO), and (ii) anaerobic biological treatment followed by membrane bioreactor and RO. Moreover, at lab-scale, four different advanced oxidation processes (Fenton reaction, photo-Fenton reaction, photocatalysis with TiO2, and ozonation) were applied. The results indicated that the concentrations of selected EDCs from paper mill wastewaters were effectively reduced (100%) by both combinations of pilot plants and photoFenton oxidation (98%), while Fenton process, photocatalysis with TiO2 and ozonation were less effective (70% to 90%, respectively).

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“…While several groups have investigated the feasibility of removing PEs from water using light-irradiation and photo-catalytic materials, 51,52) until recently very little was known about the potential toxicity of photodegradation products. To the best of our knowledge, our group was the first to describe the toxicity of PE photodegradation products formed by sunlight exposure.…”

Section: Exposure To Sunlightmentioning

confidence: 99%

Potential Risks of Phthalate Esters: Acquisition of Endocrine-disrupting Activity during Environmental and Metabolic Processing

Okamoto

Ueda

Kojima

2011

JOURNAL OF HEALTH SCIENCE

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Phthalate esters (PEs) are plasticizers used in many plastic products, food packaging materials, and medical bags. The widespread use of PEs has led to ubiquitous environmental contamination and human-exposure. Several epidemiological studies have indicated that exposure to PEs, especially during the prenatal period, induces adverse effects, including developmental and behavioral abnormalities, suggesting that PEs are endocrine-disrupters. Although the endocrine-disrupting effect of PEs is thought to be estrogen receptor (ER)-mediated, the ER-binding affinity of PEs is quite low, indicating that other mechanisms should be considered. In this review, we demonstrate that alkyl chain length and hydroxylation of PEs have a significant impact on binding to ERs and peroxisome proliferator-activated receptors. In addition, we discuss recent results from our laboratory that suggest additional risks may arise from environmental and metabolic processing of PEs through microbial transformation, microsomal metabolism, and sunlight exposure.

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The degradation of endocrine disruptor di-n-butyl phthalate by UV irradiation: A photolysis and product study

Cited by 126 publications

References 22 publications

Photodegradation of selected phthalates on mural painting surfaces under UV light irradiation

Photodegradation of selected phthalates on mural painting surfaces under UV light irradiation

Comparison of different wastewater treatments for removal of selected endocrine-disruptors from paper mill wastewaters

Potential Risks of Phthalate Esters: Acquisition of Endocrine-disrupting Activity during Environmental and Metabolic Processing

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