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https://www.readbyqxmd.com/read/29161599/perfluorinated-alkyl-acids-and-fecundity-assessment-in-striped-mullet-mugil-cephalus-at-merritt-island-national-wildlife-refuge
#1
Jacqueline T Bangma, Jessica L Reiner, Russell H Lowers, Theresa M Cantu, Jacob Scott, Jeffrey E Korte, Doug M Scheidt, Chris McDonough, Jonathan Tucker, Brenton Back, Douglas H Adams, John A Bowden
This study investigated wild caught striped mullet (Mugil cephalus) at Merritt Island National Wildlife Refuge (MINWR) for levels of 15 perfluoroalkyl acids (PFAA) in tandem with individual fecundity measurements (Oocyte sub-stage 2 late, n=42) and oocyte reproductive stages (Stages 1-5, n=128). PFAA measurements were quantified in striped mullet liver (n=128), muscle (n=49), and gonad (n=10). No significant negative impacts of liver PFAA burden on wild-caught, mullet fecundity endpoints were observed in this study; however, changes in PFAA were observed in the liver as mullet progressed through different sub-stages of oocyte development...
November 18, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29156323/early-life-exposure-to-per-and-polyfluoroalkyl-substances-and-mid-childhood-lipid-and-alanine-aminotransferase-levels
#2
Ana M Mora, Abby F Fleisch, Sheryl L Rifas-Shiman, Jennifer A Woo Baidal, Larissa Pardo, Thomas F Webster, Antonia M Calafat, Xiaoyun Ye, Emily Oken, Sharon K Sagiv
BACKGROUND: Growing evidence suggests that exposure to per- and polyfluoroalkyl substances (PFASs) may disrupt lipid homeostasis and liver function, but data in children are limited. OBJECTIVE: We examined the association of prenatal and mid-childhood PFAS exposure with lipids and alanine aminotransferase (ALT) levels in children. METHODS: We studied 682 mother-child pairs from a Boston-area pre-birth cohort. We quantified PFASs in maternal plasma collected in pregnancy (median 9...
November 17, 2017: Environment International
https://www.readbyqxmd.com/read/29155920/early-pregnancy-perfluoroalkyl-substance-plasma-concentrations-and-birth-outcomes-in-project-viva-confounded-by-pregnancy-hemodynamics
#3
Sharon K Sagiv, Sheryl L Rifas-Shiman, Abby F Fleisch, Thomas F Webster, Antonia M Calafat, Xiaoyun Ye, Matthew W Gillman, Emily Oken
Associations of prenatal exposure to perfluoroalkyl substances (PFASs), ubiquitous chemicals used in stain and water resistant products, with adverse birth outcomes may be confounded by pregnancy hemodynamics. We measured plasma concentrations of four PFASs in early pregnancy (median, 9 weeks) among 1,645 women in Project Viva, a Boston-area cohort recruited 1999-2002. We fit multivariable models to estimate PFAS associations with birth weight-for-gestational age z score and gestation length adjusting for sociodemographic confounders and two hemodynamic markers: 1) plasma albumin, a measure of plasma volume expansion, and 2) plasma creatinine, used to estimate glomerular filtration rate...
November 16, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/29154207/particle-size-distribution-and-respiratory-deposition-estimates-of-airborne-perfluoroalkyl-acids-during-the-haze-period-in-the-megacity-of-shanghai
#4
Mengjie Guo, Yan Lyu, Tingting Xu, Bo Yao, Weihua Song, Mei Li, Xin Yang, Tiantao Cheng, Xiang Li
This study presents the particle size distribution and respiratory deposition estimates of airborne perfluoroalkyl acids (PFAAs) during the haze period. Size-segregated haze aerosols were collected from an urban location in Shanghai using an eight-stage air sampler. The samples were analyzed for eight PFAAs using ultra-high-performance liquid chromatography tandem triple quadrupole mass spectrometry. The quantification results showed that the concentrations of particle-bound Σ 8PFAAs ranged from 0.26 to 1...
November 16, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29154139/perfluorinated-compounds-in-surface-waters-of-shanghai-china-source-analysis-and-risk-assessment
#5
Rui Sun, Minghong Wu, Liang Tang, Jiajun Li, Zhaoqiu Qian, Tao Han, Gang Xu
17 perfluorinated compounds (PFCs) were systematically investigated in the surface water from principal watersheds of Shanghai, China. 10 PFCs were above the detection limit (0.08-0.28ng/L) in 39 surface water samples. The perfluorooctanoic acid (PFOA) and perfluorobutanesulfonate (PFBS) were the two dominant compounds with a median concentration 50.67ng/L and 29.84ng/L, respectively. Concentrations of perfluorooctanesulfonate (PFOS) were generally less than PFBS, which might result from the global phase-out of PFOS production and the use of PFBS as a substitute for PFOS-based products...
November 16, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29150771/occurrence-and-partition-of-perfluorinated-compounds-pfcs-in-water-and-sediment-from-the-songhua-river-china
#6
Weihua Dong, Baolin Liu, Yang Song, Hong Zhang, Juying Li, Xiaoyu Cui
This study provided the first evidence that perfluorinated compounds (PFCs) were widely detected in the Songhua River, China. Seventeen surface water and sediment samples were collected and analyzed for the determination of 14 PFCs. The total concentrations of PFCs (Σ PFCs) ranged from 0.143 to 1.41 ng L(-1) in water samples. Perfluorooctanoic acid (PFOA) was detected with the highest detection frequency (%) ranging from below LOQ to 0.678 ng L(-1). Σ PFCs were relatively low in sediments, and only four individual homologues were detected...
November 17, 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/29150642/rescue-of-pfos-induced-human-sertoli-cell-injury-by-overexpressing-a-p-fak-y407e-phosphomimetic-mutant
#7
Haiqi Chen, Ying Gao, Dolores D Mruk, Xiang Xiao, Constance M John, Paul J Turek, Wing-Yee Lui, Will M Lee, Bruno Silvestrini, C Yan Cheng
PFOS induces Sertoli cell injury using testicular cells isolated from rodent testes, but it remains unknown if PFOS has similar effects in humans. Herein, we maintained human Sertoli cells in a mitotically active state in vitro, thus enabling transfection experiments that altered gene expression to explore the molecular mechanism(s) underlying toxicant-induced cell injury. Human Sertoli cells obtained from men at ages 15, 23, 36 and 40 were cultured in vitro. These differentiated Sertoli cells remained mitotically active when cultured in the presence of 10% FBS (fetal bovine serum), with a replication time of ~1-3 weeks...
November 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29149719/tissue-specific-bioaccumulation-of-long-chain-perfluorinated-carboxylic-acids-and-halogenated-methylbipyrroles-in-dall-s-porpoises-phocoenoides-dalli-and-harbor-porpoises-phocoena-phocoena-stranded-in-northern-japan
#8
Yukiko Fujii, Yoshihisa Kato, Kentarou Sakamoto, Takashi Matsuishi, Harada H Kouji, Akio Koizumi, Osamu Kimura, Tetsuya Endo, Koichi Haraguchi
This study investigated accumulation of perfluoroalkyl substances (PFASs), persistent organochlorines (OCs), and naturally produced halogenated compounds (NHCs), including brominated methylbipyrroles and methoxylated bromodiphenyl ethers, in liver, blood, and blubber from Dall's porpoises (Phocoenoides dalli) and harbor porpoises (Phocoena phocoena) stranded in Hokkaido, northern Japan. Profiles of the PFASs were dominated by perfluoroundecanoic acid and perfluorotridecanoic acid, both of which accounted for 70% of the total measured PFAS concentrations in both porpoise species...
November 14, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29149712/detection-of-perfluoroalkyl-acids-and-sulphonates-in-italian-eel-samples-by-hplc-hrms-orbitrap
#9
Luca Maria Chiesa, Maria Nobile, Elisa Pasquale, Claudia Balzaretti, Petra Cagnardi, Doriana Tedesco, Sara Panseri, Francesco Arioli
Perfluoroalkyl substances (PFASs) contain one or more carbon-bound hydrogens substituted by fluorine. Since the 1950s, these compounds have been used to manufacture fat- and water-resistant fabrics, paper and food containers, and to produce photographic films, firefighting foams, detergents and insecticides. The widespread use and global distribution of PFASs, have led to their accumulation in the environment. Food, particularly fish and other seafood, is considered the main route of human exposure to PFASs...
October 27, 2017: Chemosphere
https://www.readbyqxmd.com/read/29145101/the-distribution-and-trends-of-persistent-organic-pollutants-and-mercury-in-marine-mammals-from-canada-s-eastern-arctic
#10
REVIEW
Tanya M Brown, Robie W Macdonald, Derek C G Muir, Robert J Letcher
Arctic contaminant research in the marine environment has focused on organohalogen compounds and mercury mainly because they are bioaccumulative, persistent and toxic. This review summarizes and discusses the patterns and trends of persistent organic pollutants (POPs) and mercury in ringed seals (Pusa hispida) and polar bears (Ursus maritimus) in the Eastern Canadian Arctic relative to the rest of the Canadian Arctic. The review provides explanations for these trends and looks at the implications of climate-related changes on contaminants in these marine mammals in a region that has been reviewed little...
November 13, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29136802/carboxylated-carbon-nanospheres-as-solid-phase-extraction-adsorbents-for-the-determination-of-perfluorinated-compounds-in-water-samples-by-liquid-chromatography-tandem-mass-spectrometry
#11
Xia Wang, Ying Zhang, Fu-Wei Li, Ru-Song Zhao
This work demonstrates the extraction potential of carboxylated carbon nanospheres (CNSs-COOH) for solid-phase extraction of perfluoroalkyl acids (PFAAs) for the first time. Six PFAAs, including perfluorohexanesulfonate (PFHxS), perfluoroheptanoic acid (PFHpA), perfluorooctanoic acid (PFOA), perfluorooctanoic sulfonic (PFOS), perfluorononanoic acid (PFNA) and perfluorodecanoic acid (PFDA), were quantitatively adsorbed on a CNSs-COOH-packed cartridge; then, the PFAAs retained on the adsorbent were quantitatively eluted with an optimized volume of acetone (pH = 10)...
February 1, 2018: Talanta
https://www.readbyqxmd.com/read/29135438/exposure-to-perfluoroalkyl-substances-and-metabolic-outcomes-in-pregnant-women-evidence-from-the-spanish-inma-birth-cohorts
#12
Nuria Matilla-Santander, Damaskini Valvi, Maria-Jose Lopez-Espinosa, Cyntia B Manzano-Salgado, Ferran Ballester, Jesús Ibarluzea, Loreto Santa-Marina, Thomas Schettgen, Mònica Guxens, Jordi Sunyer, Martine Vrijheid
BACKGROUND: Exposure to perfluoroalkyl substances (PFASs) may increase risk for metabolic diseases; however, epidemiologic evidence is lacking at the present time. Pregnancy is a period of enhanced tissue plasticity for the fetus and the mother and may be a critical window of PFAS exposure susceptibility. OBJECTIVE: We evaluated the associations between PFAS exposures and metabolic outcomes in pregnant women. METHODS: We analyzed 1,240 pregnant women from the Spanish INMA [Environment and Childhood Project (INfancia y Medio Ambiente)] birth cohort study (recruitment period: 2003-2008) with measured first pregnancy trimester plasma concentrations of four PFASs (in nanograms/milliliter)...
November 13, 2017: Environmental Health Perspectives
https://www.readbyqxmd.com/read/29133598/half-lives-of-pfos-pfhxs-and-pfoa-after-end-of-exposure-to-contaminated-drinking-water
#13
Ying Li, Tony Fletcher, Daniel Mucs, Kristin Scott, Christian H Lindh, Pia Tallving, Kristina Jakobsson
BACKGROUND: Municipal drinking water contaminated with perfluorinated alkyl acids had been distributed to one-third of households in Ronneby, Sweden. The source was firefighting foam used in a nearby airfield since the mid-1980s. Clean water was provided from 16 December 2013. OBJECTIVE: To determine the rates of decline in serum perfluorohexane sulfonate (PFHxS), perfluorooctane sulfonate (PFOS) and perfluorooctanoate (PFOA), and their corresponding half-lives...
November 13, 2017: Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/29132022/determination-of-perfluoroalkyl-acid-isomers-in-biosolids-biosolids-amended-soils-and-plants-using-ultra-high-performance-liquid-chromatography-tandem-mass-spectrometry
#14
Hongna Zhang, Bei Wen, Wen Wen, Yibing Ma, Xiaoyu Hu, Yali Wu, Lei Luo, Shuzhen Zhang
Isomer-specific analysis of perfluoroalkyl acids (PFAAs) is important to accurately assess their environmental source, fate, and human risks. In this study, a method was developed for the determination of perfluorooctanoic acid (PFOA), perfluorooctane sulfonate (PFOS), and perfluorohexane sulfonate (PFHxS) isomers in biosolids, biosolids-amended soils and plants using ultra-high performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS). The separation efficiencies of two chromatographic columns and extraction capacities of different methods were tested...
November 6, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/29129060/alternate-reductants-with-vb12-to-transform-c8-and-c6-perfluoroalkyl-sulfonates-limitations-and-insights-into-isomer-specific-transformation-rates-products-and-pathways
#15
Saerom Park, Chloe de Perre, Linda S Lee
Previous studies evaluating Vitamin B12 (VB12) with Ti(III)-citrate for potential use in in situ remediation of perfluorooctanesulfonate (PFOS) found that linear (L)-PFOS was unaltered. We explored if alternate reductants could overcome this limitation with a primary focus on nanoscale zerovalent zinc (nZn(0)). Transformation over time with VB12-nZn(0) was quantified at 22, 70, and 90 °C for PFOS, at 70 °C for perfluorohexanesulfonate (PFHxS), and VB12-nFe(0) and VB12-Pd(0)/nFe(0) at 70 °C for PFOS. Only branched (br-) isomers were transformed generating F(-) (no SO4(2-)) and polyfluoroalkyl intermediates/products...
November 20, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29116335/investigation-of-perfluoroalkyl-substances-pfass-in-sediments-from-the-urban-lakes-of-anqing-city-anhui-province-china
#16
Fasong Li, Hanyu Huang, Zhibing Xu, Hui Ni, Hao Yan, Ran Chen, Yan Luo, Wei Pan, Jinyun Long, Xiaofang Ye, Xiaofen Qian, Guangming Yu
Fifteen individual perfluoroalkyl substances (PFASs) were analyzed in 22 sediment samples collected from Anqing urban lakes (Anhui province, China) by ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS). Total PFAS concentration was between 0.61 and 26 ng g(- 1) dry weight. Perfluorooctane sulfonate (PFOS) was the dominant PFAS contaminant, with a concentration range of < 0.040-13 ng g(- 1). Results indicated higher total PFAS concentrations in lakes located to the northwest of Anqing City than in other regions...
November 8, 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/29116079/a-mesoporous-cationic-thorium-organic-framework-that-rapidly-traps-anionic-persistent-organic-pollutants
#17
Yuxiang Li, Zaixing Yang, Yanlong Wang, Zhuanling Bai, Tao Zheng, Xing Dai, Shengtang Liu, Daxiang Gui, Wei Liu, Meng Chen, Lanhua Chen, Juan Diwu, Lingyan Zhu, Ruhong Zhou, Zhifang Chai, Thomas E Albrecht-Schmitt, Shuao Wang
Many environmental pollutants inherently exist in their anionic forms and are therefore highly mobile in natural water systems. Cationic framework materials that can capture those pollutants are highly desirable but scarcely reported. Here we present a mesoporous cationic thorium-based MOF (SCU-8) containing channels with a large inner diameter of 2.2 nm and possessing a high surface area of 1360 m(2) g(-1). The anion-exchange properties of SCU-8 were explored with many anions including small oxo anions like ReO4(-) and Cr2O7(2-) as well as anionic organic dyes like methyl blue and the persistent organic pollutant, perfluorooctane sulfonate (PFOS)...
November 7, 2017: Nature Communications
https://www.readbyqxmd.com/read/29108567/a-survey-of-analytical-methods-employed-for-monitoring-of-advanced-oxidation-reduction-processes-for-decomposition-of-selected-perfluorinated-environmental-pollutants
#18
Marek Trojanowicz, Krzysztof Bobrowski, Bogdan Szostek, Anna Bojanowska-Czajka, Tomasz Szreder, Iwona Bartoszewicz, Krzysztof Kulisa
The monitoring of Advanced Oxidation/Reduction Processes (AO/RPs) for the evaluation of the yield and mechanisms of decomposition of perfluorinated compounds (PFCs) is often a more difficult task than their determination in the environmental, biological or food samples with complex matrices. This is mostly due to the formation of hundreds, or even thousands, of both intermediate and final products. The considered AO/RPs, involving free radical reactions, include photolytic and photocatalytic processes, Fenton reactions, sonolysis, ozonation, application of ionizing radiation and several wet oxidation processes...
January 15, 2018: Talanta
https://www.readbyqxmd.com/read/29106950/prenatal-exposure-to-perfluoralkyl-substances-pfass-associated-with-respiratory-tract-infections-but-not-allergy-and-asthma-related-health-outcomes-in-childhood
#19
A Impinen, U C Nygaard, K C Lødrup Carlsen, P Mowinckel, K H Carlsen, L S Haug, B Granum
BACKGROUND: Prenatal exposure to perfluoralkyl substances (PFASs) has been reported to be associated with immunosuppression in early childhood, but with contradictory findings related to atopic and lung diseases. AIM: We aimed to determine if prenatal exposure to PFASs is associated with asthma or other allergic diseases or respiratory tract infections in childhood. METHODS: Nineteen PFASs were measured in cord blood available from 641 infants in the Environment and Childhood Asthma (ECA) prospective birth cohort study...
October 26, 2017: Environmental Research
https://www.readbyqxmd.com/read/29100694/worldwide-drinking-water-occurrence-and-levels-of-newly-identified-perfluoroalkyl-and-polyfluoroalkyl-substances
#20
Hermann A Kaboré, Sung Vo Duy, Gabriel Munoz, Ladji Méité, Mélanie Desrosiers, Jinxia Liu, Traoré Karim Sory, Sébastien Sauvé
In the last decade or so, concerns have arisen with respect to the widespread occurrence of perfluoroalkyl acids (PFAAs) in the environment, food, drinking water, and humans. In this study, the occurrence and levels of a large range of perfluoroalkyl and polyfluoroalkyl substances (PFASs) were investigated in drinking water (bottled and tap water samples) from various locations around the world. Automated off-line solid phase extraction followed by ultra-high-performance liquid chromatography coupled to high-resolution mass spectrometry was used to analyze PFASs of various chain lengths and functional groups...
October 31, 2017: Science of the Total Environment
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