keyword
MENU ▼
Read by QxMD icon Read
search

Pfos

keyword
https://www.readbyqxmd.com/read/27915145/co-adsorption-of-perfluorooctane-sulfonate-and-phosphate-on-boehmite-influence-of-temperature-phosphate-initial-concentration-and-ph
#1
Jin Qian, Mengmeng Shen, Peifang Wang, Chao Wang, Jing Hu, Jun Hou, Yanhui Ao, Hao Zheng, Kun Li, Jingjing Liu
The co-presence of perfluorooctane sulfonate (PFOS) and phosphate in wastewater of various industries has been detected. Removing PFOS and phosphate simultaneously before discharging sewage into natural water can decrease effectively the environmental risk caused by the combined pollution of PFOS and phosphate. In this study, laboratory batch experiments were conducted for investigating the co-adsorption of PFOS and phosphate on boehmite and the influences of temperature, phosphate initial concentration and pH on the co-adsorption...
December 1, 2016: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/27914867/new-hbm-values-for-emerging-substances-inventory-of-reference-and-hbm-values-in-force-and-working-principles-of-the-german-human-biomonitoring-commission
#2
REVIEW
Petra Apel, Jürgen Angerer, Michael Wilhelm, Marike Kolossa-Gehring
The German Human Biomonitoring Commission (HBM Commission) derives health-related guidance values (Human Biomonitoring assessment values, HBM values) according to the procedures described in the HBM Commission's position papers. Since the last adaption of the methodology in 2014, the HBM Commission has established a series of new HBM values, mainly on the basis of internationally agreed TDI/RfD values, or of toxicologically well- founded points of departure observed in animal studies. The derivation of these new HBM values for HBCDD, triclosan, 2-MBT, PFOA and PFOS as well as for the metabolites of glycol ethers, of Hexamoll(®) DINCH(®), DPHP, DEHTP, NMP, NEP, and 4-MBC is specified, and the HBM values are presented together with already established HBM values for other substances...
September 17, 2016: International Journal of Hygiene and Environmental Health
https://www.readbyqxmd.com/read/27905562/occurrence-temporal-trends-and-half-lives-of-perfluoroalkyl-acids-pfaas-in-occupational-workers-in-china
#3
Jianjie Fu, Yan Gao, Lin Cui, Thanh Wang, Yong Liang, Guangbo Qu, Bo Yuan, Yawei Wang, Aiqian Zhang, Guibin Jiang
Paired serum and urine samples were collected from workers in a fluorochemical plant from 2008 to 2012 (n = 302) to investigate the level, temporal trends, and half-lives of PFAAs in workers of a fluorochemical plant. High levels of perfluorohexane sulfonate (PFHxS), perfluorooctanoic acid (PFOA), and perfluorooctanesulfonate (PFOS) were detected in serum with median concentrations of 764, 427, and 1725 ng mL(-1), respectively. The half-lives of PFAAs in workers were estimated by daily clearance rates and annual decline rates of PFAAs in serum by a first-order model...
December 1, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27887832/perfluoroalkyl-acids-pfaas-in-the-pra-and-kakum-river-basins-and-associated-tap-water-in-ghana
#4
David K Essumang, Albert Eshun, Jonathan N Hogarh, John K Bentum, Joseph K Adjei, Junya Negishi, Shihori Nakamichi, Md Habibullah-Al-Mamun, Shigeki Masunaga
Perfluoroalkyl acids (PFAAs) are persistent environmental pollutants that have been detected in various media including human serum. Due to concerns regarding their bioaccumulation and possible negative health effects, an understanding of routes of human exposure is necessary. PFAAs are recalcitrant in many water treatment processes, making drinking water a potential source of human exposure. This study presents the first report on contamination from PFAAs in river and drinking water in Ghana. The targeted PFAAs were perfluoroalkyl carboxylic acids (PFCAs) with C4-14 carbon chain and perfluoroalkane sulphonic acids (PFSAs) with C6, 8, 10...
November 22, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27886542/occurrence-of-perfluoroalkyl-substances-in-cord-serum-and-association-with-growth-indicators-in-newborns-from-beijing
#5
Yu Shi, Lin Yang, Jingguang Li, Jianqiang Lai, Yuxin Wang, Yunfeng Zhao, Yongning Wu
Perfluoroalkyl substances (PFASs), a group of environmental pollutants, persistently exist in the environment. To investigate the associations between PFASs levels in cord serum and birth weight, birth length and ponderal index, we measured PFASs in cord serum samples from 170 infants from Feb. 2012 to Jun. 2012 in Beijing, China. The mean concentrations in cord serum samples for perfluorooctanoic acid (PFOA), perfluorooctane sulfonic acid (PFOS), perfluorohexane sulfonic acid (PFHxS), perfluorononanoic acid (PFNA), perfluorodecanoic acid (PFDA) and perfluoroundecanoic acid (PFUnA) were 1...
November 22, 2016: Chemosphere
https://www.readbyqxmd.com/read/27884404/exposure-to-perfluoroalkyl-substances-and-thyroid-function-in-pregnant-women-and-children-a-systematic-review-of-epidemiologic-studies
#6
REVIEW
Virginia Ballesteros, Olga Costa, Carmen Iñiguez, Tony Fletcher, Ferran Ballester, Maria-Jose Lopez-Espinosa
INTRODUCTION: Thyroid hormones (THs) are especially important for brain maturation and development during the fetal period and childhood. Several epidemiological studies have assessed the possible association between exposure to perfluoroalkyl substances (PFAS) and thyroid outcomes during the early stages of life. We aimed to review this evidence. METHODS: We conducted a systematic review in compliance with the PRISMA Statement (search conducted in PubMed and Embase, as well as in the citations of the selected articles)...
November 21, 2016: Environment International
https://www.readbyqxmd.com/read/27875720/multi-generational-xenoestrogenic-effects-of-perfluoroalkyl-acids-pfaas-mixture-on-oryzias-latipes-using-a-flow-through-exposure-system
#7
Jin Wuk Lee, Jae-Woo Lee, Yu-Jin Shin, Ji-Eun Kim, Tae-Kwon Ryu, Jisung Ryu, Jaean Lee, Pilje Kim, Kyunghee Choi, Kyunghwa Park
To elucidate the multi-generational estrogenic potential of Perfluoroalkyl acids (PFAAs) mixture, vitellogenin (VTG) expression, growth indices, histological alteration, fecundity, hatching rate, larval survival rate, and sex ratio of Japanese medaka (Oryzias latipes) were investigated by exposing the fish to a mixture of perfluorooctane sulfonate (PFOS), perfluroroctanoic acid (PFOA), perfluorobutane sulfonate (PFBS), and perfluorononanoic acid (PFNA) for three generations (238 days). Mixture composition is in the ratio of 1:1:1:1...
November 19, 2016: Chemosphere
https://www.readbyqxmd.com/read/27871870/carcinogenic-risk-of-emerging-persistent-organic-pollutant-perfluorooctane-sulfonate-pfos-a-proposal-of-classification
#8
Ricardo Arrieta-Cortes, Paulina Farias, Carlos Hoyo-Vadillo, Mina Kleiche-Dray
: Perfluoroalkyls are stable synthetic chemicals, able to repel oils, fats and water. These compounds have been used in the manufacturing of products such as Teflon(®), lubricants, paints, fire-fighting foams, coatings for pans, carpets, clothes, and paperboard for packaging, among others. It is believed that populations are exposed constantly to them. Its regulation in the world is under development and several controversies are in the course of litigation. One occupational study shows bladder cancer risk...
November 18, 2016: Regulatory Toxicology and Pharmacology: RTP
https://www.readbyqxmd.com/read/27858089/oxidative-damage-and-cytotoxicity-of-perfluorooctane-sulfonate-on-chlorella-vulgaris
#9
Dongmei Xu, Xuesong Chen, Bo Shao
We studied the effects of perfluorooctane sulfonate (PFOS) on the chlorophyll content, cell permeability, and antioxidant defense systems of the green alga Chlorella vulgaris. The results showed that the production of reactive oxygen species increased in a concentration-dependent manner after exposure to PFOS for 96 h. Superoxide dismutase and catalase activity was elevated after exposure to the lower concentrations and then decreased with higher concentrations. Malondialdehyde content was significantly higher than that of controls at the higher PFOS concentrations...
November 17, 2016: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/27847230/fate-of-emerging-and-priority-micropollutants-during-the-sewage-sludge-treatment-case-study-of-paris-conurbation-part-1-contamination-of-the-different-types-of-sewage-sludge
#10
R Mailler, J Gasperi, D Patureau, E Vulliet, N Delgenes, A Danel, S Deshayes, V Eudes, S Guerin, R Moilleron, G Chebbo, V Rocher
This article provides data on the contamination of different kinds of sludge (raw, centrifuged, digested, thermally dried sludge and sludge cake) from Paris conurbation by 71 various pollutants including pharmaceutical products (PHPs), hormones, perfluorinated acids (PFAs), linear alkylbenzene sulfonate (LAS), alkylphenols (APs), phthalates (PAEs), polycyclic aromatic hydrocarbons (PAHs) and polychlorobiphenyls (PCBs). Very high contents of LAS (0.1-10g/kg dry matter - DM) compared to other compounds were found in all types of sludge followed by DEHP (10-100mg/kg DM) and fluoroquinolones (1-100mg/kg DM)...
November 12, 2016: Waste Management
https://www.readbyqxmd.com/read/27837466/thyroid-disruption-by-perfluorooctane-sulfonate-pfos-and-perfluorooctanoate-pfoa
#11
REVIEW
F Coperchini, O Awwad, M Rotondi, F Santini, M Imbriani, L Chiovato
BACKGROUND: Perfluorooctane sulfonate (PFOS) and perfluorooctanoate (PFOA) are two fluorinated compounds widely used in industry because of their useful chemical characteristics. They were identified as endocrine disruptors due to their ability to interfere with thyroid function. The resistance of PFOA and PFOS to environmental degradation, their bio-accumulation in food chains, and their long half-life raised concern in the scientific community, and several studies were performed with the aim to establish the real dangerousness of these compounds for the human health...
November 11, 2016: Journal of Endocrinological Investigation
https://www.readbyqxmd.com/read/27834049/spatio-temporal-dynamics-of-per-and-polyfluoroalkyl-substances-pfass-and-transfer-to-periphytic-biofilm-in-an-urban-river-case-study-on-the-river-seine
#12
Gabriel Munoz, Lise C Fechner, Emmanuel Geneste, Patrick Pardon, Hélène Budzinski, Pierre Labadie
This study addresses the spatio-temporal dynamics of per and polyfluoroalkyl substances (PFASs) in a highly urbanized freshwater hydrosystem, the Seine River (NW France). The distribution of PFASs between water, sediment, and periphytic biofilm was investigated at three sampling sites along a longitudinal gradient upstream and downstream from the Paris urban area. Seasonal variability was assessed through four sampling campaigns performed under contrasting hydrological conditions. In the dissolved phase, ∑PFASs fluctuated between 2 and 9 ng L(-1) upstream and 6-105 ng L(-1) downstream from Paris...
November 10, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27825932/evaluation-of-pfos-mediated-neurotoxicity-in-rat-primary-neurons-and-astrocytes-cultured-separately-or-in-co-culture
#13
Zhenwei Li, Qi Liu, Chang Liu, Chunna Li, Yachen Li, Shuangyue Li, Xiaohui Liu, Jing Shao
Perfluorooctane sulfonate (PFOS) is a potential neurotoxicant reported by epidemiological investigations and experimental studies, while the underlying mechanisms are still unclear. Astrocytes not only support for the construction of neurons, but also conduct neuronal functions through glutamate-glutamine cycle in astrocyte-neuron crosstalk. In the present study, the effect of PFOS exposure on rat primary hippocampal neurons or cortex astrocytes was evaluated. Then the role of the astrocytes in PFOS-induced toxic effect on neurons was explored with astrocyte-neuron co-culture system...
November 5, 2016: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/27824939/factors-associated-with-maternal-serum-levels-of-perfluoroalkyl-substances-and-organochlorines-a-descriptive-study-of-parous-women-in-norway-and-sweden
#14
Hilde B Lauritzen, Tricia L Larose, Torbjørn Øien, Jon Ø Odland, Margot van de Bor, Geir W Jacobsen, Torkjel M Sandanger
INTRODUCTION: Perfluoroalkyl substances (PFASs) and organochlorines (OCs) are ubiquitous and persistent in the environment and proposed endocrine disrupting chemicals (EDCs). They can be transferred across the placenta during pregnancy, and studies suggest that the prenatal period may be particularly sensitive for influences on fetal growth and development. Several studies have investigated socio-demographic and pregnancy related factors associated with maternal serum PFAS and OC levels, but few studies have been conducted in time periods with increasing emissions of PFASs and recent emissions of OCs...
2016: PloS One
https://www.readbyqxmd.com/read/27818224/perfluorooctane-sulfonate-pfos-disrupts-blood-testis-barrier-by-down-regulating-junction-proteins-via-p38-mapk-atf2-mmp9-signaling-pathway
#15
Lianglin Qiu, Yingyun Qian, Zhenzhen Liu, Chao Wang, Jianhua Qu, Xiaoke Wang, Shoulin Wang
Perfluorooctane sulfonate (PFOS), an ubiquitous environmental pollutant, has been associated with male reproductive disorders. However, the underlying mechanisms are not yet fully understood. In this study, in vivo and in vitro models were used to explore the effects of PFOS on blood-testis barrier (BTB) and related molecular mechanisms. First, male ICR mice were orally administrated PFOS (0.5-10mg/kg/bw) for 4 weeks. Bodyweight, sperm count, BTB integrity and the expression of proteins including p38 mitogen-activated protein kinase (MAPK), activating transcription factor 2 (ATF2), matrix metalloproteinase 9 (MMP9), tissue inhibitor of metalloproteinase 1(TIMP1) and BTB related junction proteins were evaluated...
December 12, 2016: Toxicology
https://www.readbyqxmd.com/read/27810539/perfluoroalkyl-acids-in-the-water-cycle-from-a-freshwater-river-basin-to-coastal-waters-in-eastern-china
#16
Xiaobin Zhu, Ling Jin, Jingping Yang, Jianfeng Wu, Beibei Zhang, Xiaowei Zhang, Nanyang Yu, Si Wei, Jichun Wu, Hongxia Yu
The distribution of perfluoroalkyl acids (PFAAs), one class of persistent organic pollutants, in groundwater, especially in confined aquifers remains poorly understood. In this study, we investigated the occurrence of 12 PFAAs through a water cycle from the Huai River Basin to the Yellow Sea, including confined aquifers, unconfined aquifers, rivers, and coastal waters. We found the ubiquity of PFAAs in all types of samples, including those from confined aquifers (2.7-6.8 ng/L). Perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) were the major PFAAs in all samples, accounting for an average of 49...
October 28, 2016: Chemosphere
https://www.readbyqxmd.com/read/27810111/embryonic-exposures-to-perfluorooctanesulfonic-acid-pfos-disrupt-pancreatic-organogenesis-in-the-zebrafish-danio-rerio
#17
Karilyn E Sant, Haydee M Jacobs, Katrina A Borofski, Jennifer B Moss, Alicia R Timme-Laragy
Perfluorooctanesulfonic acid (PFOS) is a ubiquitous environmental contaminant, previously utilized as a non-stick application for consumer products and firefighting foam. It can cross the placenta, and has been repeatedly associated with increased risk for diabetes in epidemiological studies. Here, we sought to establish the hazard posed by embryonic PFOS exposures on the developing pancreas in a model vertebrate embryo, and develop criteria for an adverse outcome pathway (AOP) framework to study the developmental origins of metabolic dysfunction...
October 31, 2016: Environmental Pollution
https://www.readbyqxmd.com/read/27801562/superamphiphobic-surfaces-prepared-by-coating-multi-functional-nanofluids
#18
Pouriya Esmaeilzadeh, Mohammad Taghi Sadeghi, Alireza Bahramian, Zahra Fakhroueian, Ali Zarbakhsh
Construction of surfaces with the capability of repelling both water and oil is a challenging issue. We report the superamphiphobic properties of mineral surfaces coated with nanofluids based on synthesized Co-doped and Ce-doped Barium Strontium Titanate (CoBST and CeBST) nanoparticles and fluorochemicals of trichloro(1H,1H,2H,2H-perfluorooctyl)silane (PFOS) and polytetrafluoroethylene (PTFE). Coating surfaces with these nanofluids provides both oil (with surface tensions as low as 23 mN/m) and water repellency...
November 1, 2016: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/27792944/uptake-of-perfluoroalkyl-substances-and-halogenated-flame-retardants-by-crop-plants-grown-in-biosolids-amended-soils
#19
Irene Navarro, Adrián de la Torre, Paloma Sanz, Miguel Ángel Porcel, Javier Pro, Gregoria Carbonell, María de Los Ángeles Martínez
The bioaccumulation behavior of perfluoroalkyl substances (PFASs) and halogenated flame retardants (HFRs) was examined in three horticultural crops and earthworms. Two species, spinach (Spinacia oleracea) and tomato (Solanum lycopersicum L.), were grown in field soil amended with a single application of biosolids (at agronomic rate for nitrogen), to represent the scenario using commercial biosolids as fertilizer, and the third crop, corn (Zea mays) was grown in spiked soil (~50mg PFOS/kg soil, ~5mg Deca-BDE/kg soil and a mixture of both, ~50mg PFOS and ~5mg Deca-BDE/kg soil) to represent a worst-case scenario...
January 2017: Environmental Research
https://www.readbyqxmd.com/read/27776305/perfluoroalkyl-substances-pfass-in-wastewater-treatment-plants-and-drinking-water-treatment-plants-removal-efficiency-and-exposure-risk
#20
Chang-Gui Pan, You-Sheng Liu, Guang-Guo Ying
Perfluoroalkyl substances (PFASs) are a group of chemicals with wide industrial and commercial applications, and have been received great attentions due to their persistence in the environment. The information about their presence in urban water cycle is still limited. This study aimed to investigate the occurrence and removal efficiency of eighteen PFASs in wastewater treatment plants (WWTPs) and drinking water plants (DWTPs) with different treatment processes. The results showed that both perfluorobutane sulfonic acid (PFBS) and perfluorooctane sulfonic acid (PFOS) were the predominant compounds in the water phase of WWTPs and DWTPs, while PFOS was dominant in dewatered sludge of WWTPs...
October 19, 2016: Water Research
keyword
keyword
13240
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"