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https://www.readbyqxmd.com/read/28531948/an-alternative-approach-to-risk-rank-chemicals-on-the-threat-they-pose-to-the-aquatic-environment
#1
Andrew C Johnson, Rachel L Donnachie, John P Sumpter, Monika D Jürgens, Claudia Moeckel, M Gloria Pereira
This work presents a new and unbiased method of risk ranking chemicals based on the threat they pose to the aquatic environment. The study ranked 12 metals, 23 pesticides, 11 other persistent organic pollutants (POPs), 13 pharmaceuticals, 10 surfactants and similar compounds and 2 nanoparticles (total of 71) of concern against one another by comparing their median UK river water and median ecotoxicity effect concentrations. To complement this, by giving an assessment on potential wildlife impacts, risk ranking was also carried out by comparing the lowest 10th percentile of the effects data with the highest 90th percentile of the exposure data...
May 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28531838/antimicrobial-agents-triclosan-chloroxylenol-methylisothiazolinone-and-borax-used-in-cleaning-had-genotoxic-and-histopathologic-effects-on-rainbow-trout
#2
Erol Capkin, Tuna Ozcelep, Sevki Kayis, Ilhan Altinok
Triclosan (TRC), chloroxylenol (PCMX) and methylisothiazolinone (MIT) have been commonly used as an antimicrobial in soaps while borax (BRX) is used in household cleaning. After using these chemicals, they are washed down drains and getting into the aquatic ecosystem in which they may affect aquatic living organisms. In the present study, the chronic effects of TRC, PCMX, MIT and BRX on genotoxicity, gene expression and histopathology of rainbow trout (Oncorhynchus mykiss) were evaluated for 40 days under semi static condition...
May 15, 2017: Chemosphere
https://www.readbyqxmd.com/read/28526231/exposures-to-endocrine-disrupting-chemicals-in-consumer-products-a-guide-for-pediatricians
#3
Katelyn H Wong, Timur S Durrani
Endocrine disrupting chemicals, a group of exogenous chemicals that can interfere with hormone action in the body, have been implicated in disrupting endocrine function, which negatively affects human health and development. Endocrine disrupting chemicals are ubiquitously detected in consumer products, foods, beverages, personal care products, and household cleaning products. Due to concerns about their negative effects on human health, several professional health provider societies have recommended the reduction of common endocrine disrupting chemical exposures...
May 16, 2017: Current Problems in Pediatric and Adolescent Health Care
https://www.readbyqxmd.com/read/28525814/risk-assessment-of-triclosan-in-the-global-environment-using-a-probabilistic-approach
#4
Jiahua Guo, Hisato Iwata
The occurrence of antimicrobial agent triclosan (TCS) in the global aquatic and terrestrial environment is an emerging concern. While risk assessment for TCS is available in certain countries, no studies have attempted to assess the risk of TCS worldwide. This could be due to lack of method to characterize the global exposure. The present study therefore proposed a probabilistic-based approach to approximate the percent-ranked measured environmental concentrations (MECs) by estimating exposure concentration distribution (ECD) for different environmental compartments on a global scale, incorporating approximate 1200 single MECs...
May 16, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28525533/phenol-concentrations-during-childhood-and-subsequent-measures-of-adiposity-among-young-girls
#5
Andrea L Deierlein, Mary S Wolff, Ashley Pajak, Susan M Pinney, Gayle C Windham, Maida P Galvez, Michael Rybak, Antonia M Calafat, Lawrence H Kushi, Frank M Biro, Susan L Teitelbaum
Phenolic compounds represent a class of environmental chemicals with potential endocrine disrupting capabilities. We investigated longitudinal associations of childhood exposures to phenols, from both man-made and natural sources, and subsequent measures of adiposity among girls enrolled in The Breast Cancer and Environment Research Program, 2004-2007. Baseline (ages 6-8 years) urinary concentrations were obtained for creatinine and phenol metabolites: enterolactone, genistein, daidzein, benzophenone-3, bisphenol A, sum of parabens (methyl, ethyl, and propyl parabens), 2,5-dichlorophenol, and triclosan...
May 19, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28516781/patterns-variability-and-predictors-of-urinary-triclosan-concentrations-during-pregnancy-and-childhood
#6
Shaina L Stacy, Melissa Eliot, Taylor Etzel, George D Papandonatos, Antonia M Calafat, Aimin Chen, Russ Hauser, Bruce P Lanphear, Sheela Sathyanarayana, Xiaoyun Ye, Kimberly Yolton, Joseph M Braun
Exposure to triclosan, an antimicrobial used in many consumer products, is ubiquitous in the United States, yet only limited data are available on the predictors and variability of exposure, particularly in children. We examined the patterns, variability, and predictors of urinary triclosan concentrations in 389 mother-child pairs enrolled in the Health Outcomes and Measures of the Environment Study from 2003-2006. We quantified triclosan in three urine samples collected from women between 16 weeks of pregnancy and birth, and six urine samples collected from children between 1-8 years of age...
May 18, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28511136/fate-of-pharmaceuticals-in-soil-after-application-of-stps-products-influence-of-physicochemical-properties-and-modelling-approach
#7
Xela García-Santiago, Juan M Garrido, Juan M Lema, Amaya Franco-Uría
Depurated effluents can be employed as reclaimed water for irrigation in regions with low precipitations, while nutrients-rich biosolids are usually applied as fertilizer for agricultural purposes. However, both practices may result in the accumulation of micropollutants in the soil compartment, the contamination of groundwater, and/or their biotransfer to different living organisms until they finally may reach human receptors. The fate and transport of seven pharmaceutical and personal care products (PPCPs) with different physicochemical properties was analysed for these scenarios employing two different models: the buckets model and the HYDRUS-1D software package...
May 11, 2017: Chemosphere
https://www.readbyqxmd.com/read/28502780/biodegradation-of-endocrine-disruptors-in-urban-wastewater-using-pleurotus-ostreatus-bioreactor
#8
Zdena Křesinová, Lucie Linhartová, Alena Filipová, Martin Ezechiáš, Pavel Mašín, Tomáš Cajthaml
The white rot fungus Pleurotus ostreatus HK 35, which is also an edible industrial mushroom commonly cultivated in farms, was tested in the degradation of typical representatives of endocrine disrupters (EDCs; bisphenol A, estrone, 17β-estradiol, estriol, 17α-ethinylestradiol, triclosan and 4-n-nonylphenol); its degradation efficiency under model laboratory conditions was greater than 90% within 12 days and better than that of another published strain P. ostreatus 3004. A spent mushroom substrate from a local farm was tested for its applicability in various batch and trickle-bed reactors in degrading EDCs in model fortified and real communal wastewater...
May 11, 2017: New Biotechnology
https://www.readbyqxmd.com/read/28500970/histopathological-changes-and-lipid-metabolism-in-the-liver-of-bufo-gargarizans-tadpoles-exposed-to-triclosan
#9
Lihong Chai, Aixia Chen, Pingping Luo, Hongfeng Zhao, Hongyuan Wang
In the current study, the adverse effects of TCS on liver health of B. gargarizans tadpoles were assessed. B. gargarizans larvae were exposed to TCS at 0, 10, 30, 60, and 150 μg L(-1) from Gosner stage 3 until metamorphic climax. The hepatosomatic index (HSI), hepatic histological and ultrastructural features, and transcript levels of genes associated with detoxification and oxidative stress as well as lipid metabolism in the livers were determined. Exposure to 150 μg L(-1) TCS resulted in increased HSI of tadpoles at metamorphic climax...
May 7, 2017: Chemosphere
https://www.readbyqxmd.com/read/28494246/catalytic-hydrodechlorination-of-triclosan-using-a-new-class-of-anion-exchange-resin-supported-palladium-catalysts
#10
Bing Han, Wen Liu, Jingwen Li, Jin Wang, Dongye Zhao, Rui Xu, Zhang Lin
We prepared a new class of anion-exchange-resin supported Pd catalysts for efficient hydrodechlorination of triclosan in water. The catalysts were prepared through an initial ion-exchange uptake of PdCl4(2-) and subsequent reduction of Pd(II) to Pd(0) nanoparticles at ambient temperature. Two standard strong-base anion exchange resins (IRA-900 and IRA-958) with different matrices (polystyrene and polyacrylic) were chosen as the supports. SEM and TEM images showed that Pd(0) nanoparticles were evenly attached on the resin surface with a mean size of 3-5 nm...
April 26, 2017: Water Research
https://www.readbyqxmd.com/read/28493716/bifenthrin-causes-toxicity-in-urban-stormwater-wetlands-field-and-laboratory-assessment-using-austrochiltonia-amphipoda
#11
Katherine Joanna Jeppe, Claudette Robin Kellar, Stephen Marshall, Valentina Colombo, Georgia May Sinclair, Vincent J Pettigrove
Stormwater wetlands are engineered to accumulate sediment and pollutants from stormwater and provide environmental value to urban environments. Therefore, contaminated sediment risks causing toxicity to aquatic fauna. This research identifies contaminants of concern in urban wetland sediments by assessing sediment toxicity using the amphipod Austrochiltonia subtenuis. Sediments from 99 wetlands were analyzed for contaminants and laboratory bioassays were performed with A. subtenuis. Wild Austrochiltonia spp...
May 11, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28483548/evaluation-of-triclosan-in-minnesota-lakes-and-rivers-part-ii-human-health-risk-assessment
#12
Lisa J Yost, Timothy R Barber, P Robinan Gentry, Michael J Bock, Jennifer L Lyndall, Marie C Capdevielle, Brian P Slezak
Triclosan, an antimicrobial compound found in consumer products, has been detected in low concentrations in Minnesota municipal wastewater treatment plant (WWTP) effluent. This assessment evaluates potential health risks for exposure of adults and children to triclosan in Minnesota surface water, sediments, and fish. Potential exposures via fish consumption are considered for recreational or subsistence-level consumers. This assessment uses two chronic oral toxicity benchmarks, which bracket other available toxicity values...
August 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28479123/evaluation-of-triclosan-in-minnesota-lakes-and-rivers-part-i-ecological-risk-assessment
#13
Jennifer Lyndall, Timothy Barber, Wendy Mahaney, Michael Bock, Marie Capdevielle
Triclosan, an antimicrobial compound found in consumer products, may be introduced into the aquatic environment via residual concentrations in municipal wastewater treatment effluent. We conducted an aquatic risk assessment that incorporated the available measured triclosan data from Minnesota lakes and rivers. Although only data reported from Minnesota were considered in the risk assessment, the developed toxicity benchmarks can be applied to other environments. The data were evaluated using a series of environmental fate models to ensure the data were internally consistent and to fill any data gaps...
August 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28476460/parental-concern-about-environmental-chemical-exposures-and-children-s-urinary-concentrations-of-phthalates-and-phenols
#14
Tripler Pell, Melissa Eliot, Aimin Chen, Bruce P Lanphear, Kimberly Yolton, Sheela Sathyanarayana, Joseph M Braun
OBJECTIVES: To examine whether parents' concerns about environmental chemical exposures were associated with urinary phthalate and phenol concentrations in their school-age children. STUDY DESIGN: In a prospective cohort of 218 mother-child pairs from Cincinnati, Ohio (2010-2014), we measured 11 phthalate metabolites and 5 phenols in urine samples when children were age 8 years and used questionnaire data from caregivers. We estimated the covariate-adjusted percent difference in phthalates and phenols among children of parents who expressed concern about environmental chemical exposures compared with children whose parents did not...
May 2, 2017: Journal of Pediatrics
https://www.readbyqxmd.com/read/28458228/antimicrobial-compounds-triclosan-and-triclocarban-in-sewage-sludges-and-their-presence-in-runoff-following-land-application
#15
M G Healy, O Fenton, M Cormican, D P Peyton, N Ordsmith, K Kimber, L Morrison
The reuse of treated municipal sewage ('biosolids') on land is an effective method to divert waste away from landfill and to use an alternative, low cost method of fertilisation. While legislation has mainly focused on the control of nutrient and metal application rates to land, other potentially harmful emerging contaminants (ECs) may be present in biosolids. Up to 80% of municipal sewage sludge is reused in agriculture in Ireland, which is currently the highest rate of reuse in Europe. However, unlike other countries, no study has been conducted on the presence of ECs across a range of wastewater treatment plants (WWTPs) in this country...
August 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28454618/evidence-appraisal-of-sandini-m-mattavelli-i-nespoli-l-uggeri-f-gianotti-l-systematic-review-and-meta-analysis-of-sutures-coated-with-triclosan-for-the-prevention-of-surgical-site-infection-after-elective-colorectal-surgery-according-to-the-prisma-statement
#16
https://www.readbyqxmd.com/read/28453252/polymer-inclusion-membranes-with-condensed-phase-membrane-introduction-mass-spectrometry-cp-mims-improved-analytical-response-time-and-sensitivity
#17
Gregory W Vandergrift, Erik T Krogh, Chris G Gill
Condensed phase membrane introduction mass spectrometry (CP-MIMS) is an online, in situ analysis technique for low volatility analytes. Analytes diffuse through a hollow fiber membrane, where they are then dissolved by a liquid (condensed) acceptor phase flowing through the membrane lumen. Permeating analytes are entrained to an atmospheric pressure ionization source for subsequent measurement by a mass spectrometer. Larger analytes, with inherently lower diffusivities, suffer from lengthy response times and lower sensitivity, limiting the use of CP-MIMS for their online, real-time measurement...
May 5, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28449922/antimicrobial-effect-and-physicochemical-properties-of-an-adhesive-system-containing-nanocapsules
#18
Bruna Genari, Vicente Castelo Branco Leitune, Denise Soledade Jornada, Melissa Camassola, Rodrigo Alex Arthur, Adriana Raffin Pohlmann, Silvia Stanisçuaski Guterres, Fabrício Mezzomo Collares, Susana Maria Werner Samuel
OBJECTIVE: To incorporate indomethacin and triclosan-loaded nanocapsules into primer and adhesive, and evaluate its properties. METHODS: Indomethacin and triclosan were encapsulated by deposition of preformed polymer and subsequently characterized regarding morphology, particle size, drug content and cytotoxicity. Nanocapsules (NCs) were incorporated into primer at 2% and into adhesive at 1, 2, 5, and 10% concentrations. Degree of conversion (DC) and softening in ethanol of the adhesive were evaluated...
April 24, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28448746/pharmaceutical-chemicals-steroids-and-xenoestrogens-in-water-sediments-and-fish-from-the-tidal-freshwater-potomac-river-virginia-usa
#19
Golala Arya, Sara Tadayon, James Sadighian, Jennifer Jones, Kim de Mutsert, Thomas B Huff, Gregory D Foster
Selected pharmaceutical chemicals, steroids and xenoestrogens (PCSXs) consisting of 29 endocrine modulators, therapeutic drugs, pesticides, detergents, plastics, and active ingredients in household products were measured in water, riverbed sediments and fish collected in a tributary embayment of the Potomac River (Hunting Creek, Alexandria, VA, USA) in the vicinity of wastewater discharge. A total of 17 PCSXs were found in the Hunting Creek samples, with steroid hormones (e.g., progesterone and 17α-ethinylestradiol), triclosan, dextromethorphan and bisphenol A being the most prominent micropollutants detected...
April 27, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28436085/effect-of-triclosan-on-anuran-development-and-growth-in-a-larval-amphibian-growth-and-development-assay
#20
Douglas J Fort, Michael B Mathis, Sascha Pawlowski, Jeffrey C Wolf, Robert Peter, Samantha Champ
A larval amphibian growth and development assay was performed to evaluate the potential effects of environmentally-relevant concentrations of triclosan (TCS) on amphibian development and growth. Xenopus laevis were exposed to TCS 0.0 (control), 6.3, 12.5 and 25.0 μg l(-1) (estimated maximum tolerable concentration) until 10 weeks post-metamorphosis. At median metamorphosis time (Nieuwkoop and Faber stage 62), five larvae per replicate were collected for snout-vent length, hind limb length and body weight measurements, and histopathological examination of thyroid glands...
April 24, 2017: Journal of Applied Toxicology: JAT
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