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Ande Rostvall, Wen Zhang, Wiebke Dürig, Gunno Renman, Karin Wiberg, Lutz Ahrens, Pablo Gago-Ferrero
This study evaluated the performance of five different sorbents (granular activated carbon (GAC), GAC + Polonite® (GAC + P), Xylit, lignite and sand) for a set of 83 micropollutants (MPs) (pharmaceuticals, perfluoroalkyl substances (PFASs), personal care products, artificial sweeteners, parabens, pesticide, stimulants), together representing a wide range of physicochemical properties. Treatment with GAC and GAC + P provided the highest removal efficiencies, with average values above 97%. Removal rates were generally lower for Xylit (on average 74%) and lignite (on average 68%), although they proved to be highly efficient for a few individual MPs...
March 6, 2018: Water Research
Jing Lu, Haipu Li, Yi Tu, Zhaoguang Yang
Parabens are preservatives widely used in foodstuffs, cosmetics and pharmaceuticals, which have led to elevated paraben concentrations in wastewater and receiving waters. Laboratory-scale batch experiments were conducted to investigate the adsorption and degradation of parabens in an aerobic activated sludge system. Results show that biodegradation plays a key role in removing parabens from the aerobic system of wastewater treatment plants, while adsorption on the sludge is not significant. The effects of parent paraben concentration, concentration of mixed liquor suspended solids (MLSS), initial pH and temperature on degradation were investigated using kinetic models...
March 9, 2018: Ecotoxicology and Environmental Safety
Abigail Cline, Laura N Uwakwe, Amy J McMichael
The ingredients in shampoos and other cosmetic products have become scrutinized by the general public and the Internet has contributed to misinformation about certain shampoos. Dermatologists must be prepared to acknowledge the concerns that their patients have about common shampoo ingredients to dispel the myths that may misinform patient decision-making. This article reviews the controversy surrounding the use of sulfates and parabens in shampoos, as well as commonly used shampoo alternatives, often called the "no-poo" method...
January 2018: Cutis; Cutaneous Medicine for the Practitioner
Ana Victoria Marta-Sanchez, Sergiane Souza Caldas, Antunielle Schneider, Sónia Maria Vaz Sanches Cardoso, Ednei Gilberto Primel
Parabens have been widely used as antimicrobial agents, mainly in food products, pharmaceuticals, and cosmetics. Although they are known as safe preservatives, they also cause some harm to human health, which has been discussed lately. Therefore, the aim of this study was to evaluate the occurrence of nine parabens (including isomers) in mineral and drinking waters, besides in drinking water treatment sludge (DWTS) samples with determination by liquid chromatography tandem mass spectrometry (LC-MS/MS). Both methods solid phase extraction (SPE) and QuEChERS were validated...
March 10, 2018: Environmental Science and Pollution Research International
F Vela-Soria, L M Iribarne-Durán, V Mustieles, I Jiménez-Díaz, M F Fernández, N Olea
Concerns are growing about human exposure to endocrine disrupting chemicals (EDCs), especially during developmental stages. Parabens (PBs) and ultraviolet filters (UVFs) are prevalent EDCs widely used as additives in cosmetics and personal care products (PCPs). The objective of this study was to develop a method to determine four PBs and ten UVFs in human milk using QuEChERS treatment and ultra-high performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS). Multivariate strategies were applied to optimize experimental parameters...
March 6, 2018: Journal of Chromatography. A
Amrit Kaur Sakhi, Azemira Sabaredzovic, Eleni Papadopoulou, Enrique Cequier, Cathrine Thomsen
BACKGROUND: Exposure to environmental phenols including parabens, bisphenols (BPs), oxybenzone/benzophenone-3 (BP-3) and triclosan (TCS) is ubiquitous. Due to evidence of their estrogenic activity, they have been considered as chemicals of concern. The exposure of the Norwegian population to these compounds is presently unknown. AIMS: To measure urinary levels of twelve different environmental phenols including four emerging bisphenols: S, F, B and AF (abbreviated as BPS, BPF, BPB and BPAF, respectively) in a healthy Norwegian population...
March 7, 2018: Environment International
M Demirkurt, Y A Olcer, M M Demir, A E Eroglu
Parabens are used as antimicrobial preservatives in food, cosmetic products and pharmaceuticals regardless of their endocrine disrupting effect. In this study, highly selective molecular imprinted polymers (MIPs) were synthesized in submicron-sizes and converted to an SPME fiber coating through electrospinning process in order to determine parabens in water samples. Conversion of MIP to a fiber is achieved via creation of spacial knitting around MIP by polystyrene. The selectivity and extraction ability of the fibers were compared with the commercial fibers and the corresponding non-imprinted polymer (NIP) coated fiber...
July 19, 2018: Analytica Chimica Acta
Rajendiran Karthikraj, Sonali Borkar, Sunmi Lee, Kurunthachalam Kannan
The exposure of pets, such as dogs and cats, to a wide range of chemicals present in the indoor environment and the concomitant increase in noninfectious diseases in these companion animals are a concern. Nevertheless, little is known about the sources and pathways of exposure to chemicals in pets. In this study, we determined the concentrations of parabens in commercially available cat and dog foods as well as in urine samples from these pets collected from the Albany area of the state of New York in the United States...
March 7, 2018: Environmental Science & Technology
Masato Honda, Morgan Robinson, Kurunthachalam Kannan
Parabens, esters of para-hydroxybenzoic acid, are commonly used as antimicrobial preservatives in cosmetics and personal care products. Although several studies report exposure of humans to parabens in Western countries, little is known about exposure of humans to parabens in Asian countries. In this study, we determined concentrations of six parabens in spot urine samples collected from nine countries and estimated daily intakes (DI) and potential health risks of parabens. Ethyl-paraben, methyl-paraben, and propyl-paraben were detected frequently at 100, 98...
March 1, 2018: Chemosphere
Behzad Nasri, Olivier Fouché
Depending on the actual number of soil-based on-site wastewater treatment system (OWTS) in an area, on-site sanitation may be a significant source of pollutants and a threat to groundwater. Even in the case of a system functioning correctly, here, a sand filter substituted for the in-situ soil, as the treated effluent may reach to the water table, it is necessary evaluating in situ how much the sand and underneath soil respectively contribute to pollutant removal. On the plot of a household in a small rural community, the functioning of a real scale OWTS was monitored for 1...
February 24, 2018: Environmental Science and Pollution Research International
Melissa M Smarr, Masato Honda, Kurunthachalam Kannan, Zhen Chen, Sungduk Kim, Germaine M Buck Louis
Antimicrobials including parabens, triclosan, and triclocarban have endocrine disrupting properties. Among 501 male partners of couples planning to become pregnant, preconception urinary biomarkers of parabens, triclosan and triclocarban exposure were quantified in spot urine samples. Men also provided two fresh semen samples collected approximately one month to undergo 24-hour semen quality analysis. Linear mixed-effects models, adjusted for creatinine, race, age and body mass index, were utilized to assess the relationship between log transformed chemical concentrations rescaled by their standard deviations and semen parameters...
February 20, 2018: Reproductive Toxicology
Dorothy Nakiwala, Hugo Peyre, Barbara Heude, Jonathan Y Bernard, Rémi Béranger, Rémy Slama, Claire Philippat
BACKGROUND: There are concerns that developmental exposure to endocrine disrupting chemicals such as phenolic compounds and phthalates could affect child cognitive function. Epidemiological studies tackling this question have mainly focused on phthalate metabolites and bisphenol A, but not on the other phenolic compounds. Our study aimed to assess the relationship between in-utero exposure to phthalates, bisphenol A and other phenolic compounds (parabens, triclosan, dichlorophenols and benzophenone-3) and the Intelligence Quotient (IQ) of boys at 5-6 years...
February 20, 2018: Environmental Health: a Global Access Science Source
Anuradha Gupta, Anas Ahmad, Hardeep Singh, Sharanjeet Kaur, Neethu K M, Md Meraj Ansari, Govindasamy Jayamurugan, Rehan Khan
Synthetic lethality is a molecular targeted therapy for selective killing of cancer cells. We exploited a lethal interaction between Superoxide dismutase1 inhibition and Bloom syndrome gene product (BLM) defect for the treatment of colorectal cancer (CRC) cells (HCT 116) with lung cancer screen-1 (LCS-1) loaded customized nanocarrier. LCS-1 has poor aqueous solubility. To overcome its limitations, customized nanocarrier (NC), composed of magnetite core coated with three polymeric shells namely, aminocellulose, branched poly(amidoamine) and paraben-PEG, was developed for encapsulating LCS-1...
February 16, 2018: Biomacromolecules
Prabha Dwivedi, Xiaoliu Zhou, Tolar G Powell, Antonia M Calafat, Xiaoyun Ye
Human exposure to consumer and personal care products chemicals such as phenols, including parabens and other antimicrobial agents, can be assessed through biomonitoring by quantifying urinary concentrations of the parent chemical or its metabolites, often after hydrolysis of phase II conjugates. Developing suitable analytical methods for the concurrent quantification of multiple exposure biomarkers is challenging because optimal conditions for the hydrolysis of such conjugates (e.g., O-glucuronides, N-glucuronides, sulfates) may differ depending on the biomarker...
February 12, 2018: Chemosphere
Lucie Kolatorova, Jana Vitku, Richard Hampl, Karolina Adamcova, Tereza Skodova, Marketa Simkova, Antonin Parizek, Luboslav Starka, Michaela Duskova
BACKGROUND: The harmful effects of endocrine disrupting compounds (EDCs) on human health are generally well-known, and exposure during fetal development may have lasting effects. Fetal exposure to bisphenol A (BPA) has been recently relatively well-studied; however, less is known about alternatives such as bisphenol S (BPS), bisphenol F (BPF) and bisphenol AF (BPAF), which have started to appear in consumer products. Parabens are another widespread group of EDCs, with confirmed transplacental passage...
February 9, 2018: Environmental Research
Michał Flasiński, Sara Kowal, Marcin Broniatowski, Pawel Wydro
Langmuir monolayers were used to study the influence of four commercially applied parabens on multicomponent systems composed of lipid species characteristic for the cellular membrane of microorganisms found in carbohydrates and proteins reach products, including food and cosmetics. The aim of the undertaken studies was to shed new light onto the problem of parabens interactions with membrane lipids and their affinity toward monolayers differing as regards the composition, mutual lipid ratios and the physicochemical properties...
February 12, 2018: Journal of Physical Chemistry. B
Martina Háková, Hedvika Raabová, Lucie Chocholoušová Havlíková, Petr Chocholouš, Jiří Chvojka, Dalibor Šatínský
Nylon 6 nanofibers were tested for their ability to serve as a sorbent for solid phase extraction (SPE). The regular nanostructure providing a great sorption area and amidic functionality should lead to the assumption that nylon 6 nanofibers could be used as a novel sorbent with great potential for sample pre-treatment. However, due to the substantial differences between classical particle sorbents used for solid phase extraction and nanofibers, it is necessary to evaluate this novel approach. This article describes three types of laboratory fabricated nylon 6 nanofibers with different surface density (5...
May 1, 2018: Talanta
Germaine M Buck Louis, Melissa M Smarr, Liping Sun, Zhen Chen, Masato Honda, Wei Wang, Rajendiran Karthikraj, Jennifer Weck, Kurunthachalam Kannan
Growing evidence supports the importance of men's exposure to non-persistent endocrine disruptors (EDCs) and couple fecundability, as measured by time-to-pregnancy (TTP). This evolving literature contrasts with the largely equivocal findings reported for women's exposures and fecundity. While most evidence relies upon urinary concentrations, quantification of EDCs in seminal plasma may be more informative about potential toxicity arising within the testes. We analyzed 5 chemical classes of non-persistent EDCs in seminal plasma for 339 male partners of couples who were recruited prior to conception and who were followed daily until pregnant or after one year of trying...
February 6, 2018: Environmental Research
Kristen J Polinski, Dana Dabelea, Richard F Hamman, John L Adgate, Antonia M Calafat, Xiaoyun Ye, Anne P Starling
BACKGROUND: Phthalates and phenols are suspected endocrine disrupting chemicals that may adversely impact fetal outcomes following in utero exposure. Understanding predictors of exposure to phthalates and phenols during the prenatal period is important. METHODS: We measured urinary concentrations of 15 phthalate metabolites and 11 phenols in 446 pregnant women enrolled in the Healthy Start pre-birth cohort. Creatinine-adjusted geometric means (GM) for each urinary biomarker were compared across categories of potential sociodemographic and dietary predictors...
January 30, 2018: Environmental Research
Amira M Aker, Lauren Johns, Thomas F McElrath, David E Cantonwine, Bhramar Mukherjee, John D Meeker
BACKGROUND: A number of phenols and parabens are added to consumer products for a variety of functions, and have been found at detectable levels in the majority of the U.S. POPULATION: Among other functions, thyroid hormones are essential in fetal neurodevelopment, and could be impacted by the endocrine disrupting effects of phenols and parabens. The present study investigated the association between ten maternal urinary phenol and paraben biomarkers (bisphenol S, triclosan, triclocarban, benzophenone-3, 2,4-dichlorophenol, 2,5-dichlorophenol, and ethyl, butyl, methyl and propyl paraben) and four plasma thyroid hormones in 439 pregnant women in a case-control sample nested within a cohort study based in Boston, MA...
January 20, 2018: Environment International
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