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phthalate ester

Harshada Sowani, Mohan Kulkarni, Smita Zinjarde
The genus Gordonia includes variedly pigmented aerobic, non-motile, non-sporulating Gram positive (sometimes variable) coccoid forms and rods. Different isolates display distinguishing physiological traits and biochemical properties that are significant in remediation applications. Strains inherently prevalent in soils, seawater, sediments and wastewaters can degrade hydrocarbons. Immobilized cells and microbial consortia containing Gordonia species have been used for in situ applications. Hydrocarbon uptake in this Actinomycete is mediated by attachment to large droplets or by pseudosolubilization of substrates...
February 13, 2019: Biotechnology Advances
Lijie Mi, Zhiyong Xie, Zhen Zhao, Mingyu Zhong, Wenying Mi, Ralf Ebinghaus, Jianhui Tang
Phthalate esters (PEs) are a class of synthetic chemicals that have been widely used as plasticizers in industrial products and households. The occurrence of PEs in the marine environment has been a concern for many years because of their adverse impacts on marine organisms and human health. In this study, six major PEs, i.e. diethyl phthalate (DEP), di‑isobutyl phthalate (DiBP), di‑n‑butyl phthalate (DnBP), benzylbutyl phthalate (BBP), dicyclohexyl phthalate (DCHP) and di‑(2‑ethylhexyl) phthalate (DEHP), were analyzed in sediment samples collected in the Bohai and Yellow seas...
February 25, 2019: Science of the Total Environment
Ta-Chen Su, Juey-Jen Hwang, Chien-Wen Sun, Shu-Li Wang
Cross-sectional studies have described an association between exposure to phthalate esters and cardiovascular risk factors. However, the association with coronary heart disease (CHD) is still unclear. A total of 180 subjects randomly selected from 336 CHD patients, and 360 age- and sex-matched non-CHD controls were included from 2008 to 2011. Urinary metabolites of phthalate esters were measured by liquid chromatography-tandem mass spectrometry. The geometric means of urinary phthalates metabolites were significantly higher for the three Di-(2-ethylhexyl)-phthalate (DEHP) metabolites, mono-2-ethylhexyl phthalate (MEHP), mono-(2-ethyl-5-hydroxyhexyl) phthalate, and mono-(2-ethyl-5-oxohexyl) phthalate among CHD patients in-hospital than those of being discharged...
February 9, 2019: Ecotoxicology and Environmental Safety
Mengke Song, Yujie Wang, Longfei Jiang, Ke Peng, Zikai Wei, Dayi Zhang, Yongtao Li, Gan Zhang, Chunling Luo
The indigenous microorganisms with the ability of metabolising di-(2-ethylhexyl) phthalate (DEHP) in agricultural soils and their interactions with non-degrading microbes were revealed by DNA-based stable isotope probing coupled with molecular ecological network. Aside from the previously reported DEHP degraders (family Planococcaceae and genus Sphingobacterium), five OTUs representing bacteria affiliated with genus Brevundimona, class Spartobacteria, genus Singulisphaera, genus Dyella and class Ktedonobacteria were linked with DEHP biodegradation...
April 10, 2019: Science of the Total Environment
Dan Zhang, Yiming Li, Yinuo Gao, Mbage Bawa, Mingxin Huo, Xiaohong Wang, Suiyi Zhu
A novel route was created to facilitate the degradation of diethyl phthalate (DEP) upon micellar polyoxometalate (POM) catalysts and H2 O2 . The best catalytic activity was obtained using [C16 H33 N(CH3 )3 ]H4 PMo10 V2 O40 (N-hexadecyl-N,N,N-trimethylammonium tetrahydrogen decamolybdo-divanadophosphate, abbreviated as (CTA)H4 PMoV) with 90.2% degradation efficiency within 30 min, while the chemical oxygen demand (COD) and total organic carbon (TOC) removal efficiency were about 77.7% and 74.3% within 40 min...
February 1, 2019: Journal of Hazardous Materials
Tiefeng Wang, Ruiqi Zhang, Di Li, Ping Su, Yi Yang
In this study, magnetized MOF-74 (Ni) was prepared using an ultrasound-assisted synthesis method. This novel functional magnetic adsorbent was characterized using various techniques. Using the prepared material as adsorbents, a magnetic solid-phase extraction method coupled with HPLC was proposed for determining four phthalate esters in Chinese liquor samples. The extraction parameters, including solution pH, adsorbent amount, extraction time, and eluent type and volume, were optimized. Under the optimized conditions, proposed method showed good linearity within the range of 1...
February 8, 2019: Journal of Separation Science
Bahareh Shoshtari-Yeganeh, Maryam Zarean, Marjan Mansourian, Roya Riahi, Parinaz Poursafa, Hakimeh Teiri, Nasim Rafiei, Bahare Dehdashti, Roya Kelishadi
This study aims to provide an overview of human studies on the association of exposure to phthalates and insulin resistance. We systematically searched human studies available until 15 January 2018.We conducted a literature search in Scopus, ISI Web of Science, PubMed, Google Scholar, and Cochrane Collaboration. We used the following keywords to identify relevant articles: "phthalate", "phthalate ester", "metabolic syndrome", "insulin resistance", "glucose intolerance", and "diabetes"...
February 8, 2019: Environmental Science and Pollution Research International
Wei Dong, Ruonan Guo, Xiaotao Sun, Hehe Li, Mouming Zhao, Fuping Zheng, Jinyuan Sun, Mingquan Huang, Jihong Wu
Phthalate esters (PAEs) are harmful to human health and have been repeatedly identified in Baijiu samples. In our study, the distribution and degradation characteristics of 14 PAEs in Baijiu raw materials (BRMs) and Baijiu during distillation were detected using QuEChERS or vortex-assisted surfactant-enhanced-emulsification liquid-liquid micro-extraction (VSLLME) methods coupled with gas chromatography-mass spectrometry. The same five PAEs were detected in all tested samples, values ranged from 0.003 to 0.292 mg/kg; however, higher concentrations existed in BRMs compared to Baijiu samples...
June 15, 2019: Food Chemistry
Lu Lu, Honghui Rong, Chong Wu, Bo Cui, Yujing Huang, Yao Tan, Ling Zhang, Yi Peng, Jose M Garcia, Ji-An Chen
To investigate the correlation between the air phthalate acid ester (PAE) exposure and serum PAE concentration and the effects of PAE exposure on reproductive health among Chongqing traffic-patrol policemen. In 2013, 32 traffic-patrol policemen working in an area with poor air quality in Chongqing and 28 traffic-patrol policemen working in an area with good air quality were selected. Their blood levels of 14 PAEs and six reproductive hormones were determined. Air samples were collected from four traffic-patrol platforms...
February 4, 2019: Environmental Science and Pollution Research International
Ana K Gutiérrez-García, José M Flores-Kelly, Tomás Ortiz-Rodríguez, Marco Antonio Kalixto-Sánchez, Antonio De León-Rodríguez
Phthalates are esters of phthalic acid used industrially as plastic additives, however, these are not covalently bound to the polymer matrix and therefore can be released to the environment. The aim of this study was to evaluate the effect of four phthalates: dibutyl phthalate (DBP), benzyl butyl phthalate (BBP), diethyl phthalate (DEP) and diethylhexyl phthalate (DEHP) on the in vitro expansion of human hematopoietic cells from umbilical cord blood. For this, 0.5 × 106 cells/mL were exposure to concentrations ranging from 0...
February 4, 2019: Cytotechnology
Ruth Nahurira, Junhuan Wang, Yanchun Yan, Yang Jia, Shuanghu Fan, Ibatsam Khokhar, Adel Eltoukhy
Members of genus Gordonia are known to degrade various xenobitics and produce secondary metabolites. The genome of a halotorelant phthalic acid ester (PAEs) degrading actinobacterium Gordonia alkanivorans strain YC-RL2 was sequenced using Biosciences RS II platform and Single Molecular Real-Time (SMRT) technology. The reads were assembled de novo by hierarchical genome assembly process (HGAP) algorithm version 2. Genes were annotated by NCBI Prokaryotic Genome Annotation Pipeline. The generated genome sequence was 4,979,656 bp with an average G+C content of 67...
February 4, 2019: AMB Express
Yang Wang, Yao Tong, Xu Xu, Lei Zhang
A three-dimensional (3D) magnetic porous N-Co@carbon dodecahedron/hierarchical carbon framework (3D N-Co@C/HCF) hybrid has been successfully synthesized by integration of the ZIF-67 into HCF and then calcination under an inert gas (N2 ). 3D N-Co@C/HCF as magnetic sorbent show good extraction ability for phthalate esters (PAEs: dibutyl phthalate (DBP), dimethyl phthalate (DMP), dicyclohexyl phthalate (DCHP), butyl benzyl phthalate (BBP), diethyl phthalate (DEP)). This is attributed not only to the abundant adsorption sites (due to the presence of large specific surface area) and the extremely strong π-conjugated system of 3D N-Co@C/HCF, but also to sufficient contact spaces and facile transport channels (ascribe to the interconnected hierarchical 3D porous structure) between targets and the material...
April 25, 2019: Analytica Chimica Acta
Yong He, Qingmei Wang, Wei He, Fuliu Xu
The occurrence, composition, and partitioning of six phthalate esters (PAEs) (dimethyl phthalate (DMP), diethyl phthalate (DEP), diisobutyl phthalate (DIBP), dibutyl phthalate (DBP), butyl benzyl phthalate (BBP) and di(2-ethylhexyl) phthalate (DEHP)) in the water-suspended particulate matter (SPM) system of Lake Chaohu were investigated in this study. Our results showed that PAEs were ubiquitous contaminants in Lake Chaohu. The concentration of the Σ6 PAEs in dissolved and particulate phases ranged from 0...
January 15, 2019: Science of the Total Environment
Maryam Zarean, Mojtaba Keikha, Awat Feizi, Maryamsadat Kazemitabaee, Roya Kelishadi
Environmental chemicals such as phthalate esters may have adverse effects on anogenital distance (AGD), but the evidence in both genders has not been reviewed systematically. The objective of the present study is to conduct a systematic review and meta-analysis of studies that analyzed the relationship between exposure to phthalates and AGD. English papers published up to March 2018 were searched in PubMed, Scopus, Clarivate-Web of Science, and Google scholar. We applied fixed-effects models to calculate pooled beta coefficient [β]...
January 9, 2019: Environmental Pollution
Christina Christia, Giulia Poma, Stuart Harrad, Cynthia A de Wit, Ylva Sjostrom, Pim Leonards, Marja Lamoree, Adrian Covaci
Plasticizers are a category of chemicals extensively used in consumer products and, consequently, their presence is ubiquitous in the indoor environment. In the present study, an analytical method has been developed for the quantification of plasticizers (7 legacy phthalate esters (LPEs) and 14 alternative plasticizers (APs)) in indoor floor dust based on ultrasonic and vortex extraction, Florisil fractionation and GC-(EI)-MS analysis. Dust samples (n = 54) were collected from homes, offices, and daycare centers from different EU countries (Belgium, the Netherlands, Ireland and Sweden)...
November 22, 2018: Environmental Research
Gal Vered, Aviv Kaplan, Dror Avisar, Noa Shenkar
The interaction of microplastic (MP) with marine organisms is crucial for understanding the significant effect that MP and its additives may have on marine environments. However, knowledge regarding the magnitude of these pollutants in the Eastern Mediterranean Sea and the tropical Red Sea is still scarce. Here we examined the levels of phthalate acid esters (PAEs) and MP in Herdmania momus and Microcosmus exasperatus sampled along the Mediterranean and Red Sea coasts of Israel. High levels of dibutyl phthalate (DBP) and bis (2‑ethylhexyl) phthalate (DEHP) were found in ascidians at the majority of sampling sites, and MP particles were found in ascidians at all sites...
January 2019: Marine Pollution Bulletin
Christine Zhou, Ninad Zaman, Yunbo Li, Daniel B Martinez-Arguelles, Vassilios Papadopoulos, Barry Zirkin, Kassim Traore
Mono-(2-ethylhexyl) phthalate (MEHP), the active metabolite of di-(2-ethylhexyl) phthalate (DEHP), is a plasticizer with endocrine disruptor activity that has been shown to stimulate basal steroid biosynthesis in Leydig cells. The mechanism by which it does so is unknown. Using MA-10 mouse tumor Leydig cells, we assessed the effects of MEHP on reactive oxygen species (ROS) levels, and on the signal transduction pathways that mobilize cholesterol. Exposure to 0-300 µM MEHP stimulated basal progesterone production in a dose-dependent manner...
January 12, 2019: Reproductive Toxicology
Dan Zhang, Langping Wu, Jun Yao, Carsten Vogt, Hans-Hermann Richnow
We systematically investigated the changes of carbon and hydrogen isotope signatures of three phthalate esters (PAEs) during (i) abiotic hydrolysis over the pH range of 2, 7 and 10, and (ii) aerobic biodegradation initiated by hydrolysis by Rhodococcus opacus strain DSM 43250. Significant carbon isotopic fractionation was exhibited under all investigated conditions. Hydrogen isotopic fractionation was observed in some experiments and is hypothesized to be a secondary isotope effect due to the absence of a hydrogen bond cleavage during hydrolysis...
January 4, 2019: Science of the Total Environment
Xiangyun Gao, Ji Li, Xiaonan Wang, Junli Zhou, Bo Fan, Wenwen Li, Zhengtao Liu
The environmental spatial distribution and exposure risk of 6 phthalate esters (PAEs) including dimethyl phthalate (DMP), diethyl phthalate (DEP), butyl benzyl phthalate (BBP), di-n-octyl phthalate (DnOP), bis(2-ethylhexyl) phthalate (DEHP), and dibutyl phthalate (DBP), in surface water and sediment of Taihu Lake basin, China, were investigated at 65 sites. The exposure concentrations of 6 PAEs (∑6PAEs) detected in the samples spanned a range of 0.740-13.0 μg/L in surface water and 5.15-20.9 mg/kg in sediment...
January 11, 2019: Ecotoxicology and Environmental Safety
Bo Zhang, Tao Zhang, Yishuang Duan, Zhen Zhao, Xiongfei Huang, Xueyuan Bai, Lei Xie, Yuan He, Jiping Ouyang, Yanduo Yang, Yili Wu, Hongwen Sun
Phthalate esters (PAEs) can be released into the environment during the dismantling of electronic waste (e-waste), but urinary levels of PAE metabolites (mPAEs) in humans living in e-waste sites have not been documented. In this study, 11 mPAEs were determined in urine samples collected from participants living in e-waste dismantling sites and a reference area in Southern China. The total urinary concentrations of the 11 mPAEs (∑mPAEs) in the e-waste sites (range: 11.1 ng/mL to 3380 ng/mL) were dominated by mono-(2-isobutyl) phthalate and mono-n-butyl phthalate...
January 8, 2019: Environment International
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