keyword
MENU ▼
Read by QxMD icon Read
search

PCBs

keyword
https://www.readbyqxmd.com/read/28733821/zero-valent-iron-particles-for-pcb-degradation-and-an-evaluation-of-their-effects-on-bacteria-plants-and-soil-organisms
#1
Alena Ševců, Yehia S El-Temsah, Jan Filip, Erik J Joner, Kateřina Bobčíková, Miroslav Černík
Two types of nano-scale zero-valent iron (nZVI-B prepared by borohydride reduction and nZVI-T produced by thermal reduction of iron oxide nanoparticles in H2) and a micro-scale ZVI (mZVI) were compared for PCB degradation efficiency in water and soil. In addition, the ecotoxicity of nZVI-B and nZVI-T particles in treated water and soil was evaluated on bacteria, plants, earthworms, and ostracods. All types of nZVI and mZVI were highly efficient in degradation of PCBs in water, but had little degradation effect on PCBs in soil...
July 22, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28732338/toxic-organic-substances-and-marker-compounds-in-size-segregated-urban-particulate-matter-implications-for-involvement-in-the-in%C3%A2-vitro-bioactivity-of-the-extractable-organic-matter
#2
Athanasios Besis, Alexandra Tsolakidou, Dimitra Balla, Constantini Samara, Dimitra Voutsa, Anastasia Pantazaki, Theodora Choli-Papadopoulou, Theodore S Lialiaris
Toxic organic substances and polar organic marker compounds, i.e. polychlorinated biphenyls (PCBs), organochlorine pesticides (OCPs), polybrominated diphenyl ethers (PBDEs), polycyclic aromatic hydrocarbons (PAHs) and their nitro-derivatives (N-PAHs), as well as dicarboxylic acids (DCAs) and sugars/sugar anhydrites (S/SAs) were analyzed in size-segregated PM samples (<0.49, 0.49-0.97, 0.97-3 and >3 μm) collected at two urban sites (urban traffic and urban background) during the cold and the warm season...
July 18, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28732330/legacy-persistent-organic-pollutants-including-pbdes-in-the-trophic-web-of-the-ross-sea-antarctica
#3
Simonetta Corsolini, Nicoletta Ademollo, Tania Martellini, Demetrio Randazzo, Marino Vacchi, Alessandra Cincinelli
The ecological features of the Ross Sea trophic web are peculiar and different from other polar food webs, with respect to the use of habitat and species interactions; due to its ecosystem integrity, it is the world's largest Marine Protected Area, established in 2016. Polar organisms are reported to bioaccumulate lipophilic contaminant, viz persistent organic pollutants (POPs). Legacy POPs and flame retardants (polybrominated diphenyl ethers, PBDEs) were studied in key species of the Ross Sea (Euphausia superba, Pleuragramma antarctica) and their predators (Dissostichus mawsoni, Pygoscelis adeliae, Aptenodytes forsteri, Catharacta maccormicki, Leptonychotes weddellii)...
July 12, 2017: Chemosphere
https://www.readbyqxmd.com/read/28724226/application-of-a-crustacean-bioassay-to-evaluate-a-multi-contaminated-metal-pah-pcb-harbor-sediment-before-and-after-electrokinetic-remediation-using-eco-friendly-enhancing-agents
#4
Y Tian, C Boulangé-Lecomte, A Benamar, N Giusti-Petrucciani, A Duflot, S Olivier, C Frederick, J Forget-Leray, F Portet-Koltalo
Electrokinetic (EK) remediation can be a suitable technology for treating contaminated dredged harbor sediment, stored on terrestrial disposal sites. Citric acid (CA) and biosurfactants (rhamnolipids and saponin) were chosen as enhancing agents for simultaneous metal (Cd, Cr, Cu, Pb, Zn) and PAH/PCB removal by EK because of their potential low toxicity with a view to site restoration. Three EK runs were performed using a periodic voltage (1Vcm(-1)) and various concentrations of agents. The best combination of CA (0...
July 14, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28720696/persistent-organic-pollutants-impair-insulin-secretory-function-of-pancreatic-beta-cells-human-and-in-vitro-evidence
#5
Yu-Mi Lee, Chae-Myeong Ha, Se-A Kim, Themis Thoudam, Young-Ran Yoon, Dae-Jung Kim, Hyeon-Chang Kim, Hyo-Bang Moon, Sungmi Park, In-Kyu Lee, Duk-Hee Lee
Persistent organic pollutants (POPs), especially organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs), have emerged as a new risk factor of type 2 diabetes (T2D). We evaluated whether chronic exposure to low-dose POPs affects insulin secretory function of beta-cells in humans and in vitro cells. Serum concentrations of OCPs and PCBs were measured in 200 nondiabetic adults. Mathematical-model-based insulin secretion indices were estimated using a 2-hour 7-sample oral glucose tolerance test. Insulin secretion by INS1E beta-cells was measured after 48-hour treatment with 3 OCPs or a PCB mixture...
July 18, 2017: Diabetes
https://www.readbyqxmd.com/read/28719193/relationships-between-atmospheric-transport-regimes-and-pcb-concentrations-in-air-at-zeppelin-spitsbergen
#6
Sandy Ubl, Martin Scheringer, Konrad Hungerbühler
Polychlorinated biphenyls (PCBs) are persistent hazardous chemicals that are still detected in the atmosphere and other environmental media although their production has been banned for several decades. At the long-term monitoring site, Zeppelin at Spitsbergen, different PCB congeners have been continuously measured for more than a decade. However, it is not clear what factors determine the seasonal and inter-annual variability of different (lighter vs. heavier) PCB congeners. To investigate the influence of atmospheric transport patterns on PCB-28 and PCB-101 concentrations at Zeppelin, we applied the Lagrangian Particle Dispersion Model FLEXPART and calculated "footprints'' that indicate the potential source regions of air arriving at Zeppelin...
July 18, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28713350/biphenyl-modulates-the-expression-and-function-of-respiratory-oxidases-in-the-polychlorinated-biphenyls-degrader-pseudomonas-pseudoalcaligenes-kf707
#7
Federica Sandri, Stefano Fedi, Martina Cappelletti, Francesco M Calabrese, Raymond J Turner, Davide Zannoni
Pseudomonas pseudoalcaligenes KF707 is a soil bacterium which is known for its capacity to aerobically degrade harmful organic compounds such as polychlorinated biphenyls (PCBs) using biphenyl as co-metabolite. Here we provide the first genetic and functional analysis of the KF707 respiratory terminal oxidases in cells grown with two different carbon sources: glucose and biphenyl. We identified five terminal oxidases in KF707: two c(c)aa3 type oxidases (Caa3 and Ccaa3), two cbb3 type oxidases (Cbb31 and Cbb32), and one bd type cyanide-insensitive quinol oxidase (CIO)...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28710978/relationships-between-pops-biometrics-and-circulating-steroids-in-male-polar-bears-ursus-maritimus-from-svalbard
#8
Tomasz M Ciesielski, Ingunn Tjelta Hansen, Jenny Bytingsvik, Martin Hansen, Elisabeth Lie, Jon Aars, Bjørn M Jenssen, Bjarne Styrishave
The aim of this study was to determine the effects of persistent organic pollutants (POPs) and biometric variables on circulating levels of steroid hormones (androgens, estrogens and progestagens) in male polar bears (Ursus maritimus) from Svalbard, Norway (n = 23). Levels of pregnenolone (PRE), progesterone (PRO), androstenedione (AN), dehydroepiandrosterone (DHEA), testosterone (TS), dihydrotestosterone (DHT), estrone (E1), 17α-estradiol (αE2) and 17β-estradiol (βE2) were quantified in polar bear serum by gas chromatography tandem mass spectrometry (GC-MS/MS), while POPs were measured in plasma...
July 12, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28710428/the-use-of-a-hybrid-sequential-biofiltration-system-for-the-improvement-of-nutrient-removal-and-pcb-control-in-municipal-wastewater
#9
Edyta Kiedrzyńska, Magdalena Urbaniak, Marcin Kiedrzyński, Adam Jóźwik, Agnieszka Bednarek, Ilona Gągała, Maciej Zalewski
This article aims to evaluate the efficiency of an innovative hybrid Sequential Biofiltration System (SBS) for removing phosphorus and nitrogen and polychlorinated biphenyls (PCBs) from original municipal wastewater produced by a Wastewater Treatment Plant under authentic operating conditions. The hybrid SBS was constructed with two barriers, a geochemical (filtration beds with limestone, coal and sawdust) and a biological barrier (wetlands with Glyceria, Acorus, Typha, Phragmites), operating in parallel. Significant differences were found between inflow and outflow from the SBS with regard to wastewater contaminant concentrations, the efficiency of removal being 16% (max...
July 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28705580/relationship-between-serum-dioxin-like-polychlorinated-biphenyls-and-post-testicular-maturation-in-human-sperm
#10
Raiza Paul, Julia Moltó, Nuria Ortuño, Alejandro Romero, Carlos Bezos, Jon Aizpurúa, Mª José Gómez-Torres
The relationship between dioxin-like polychlorinated biphenyl (DL-PCB) levels in serum and semen parameters were investigated. Our case-control included two groups of patients. Total concentrations of PCBs were significantly higher in the low semen quality (n=24) than in the normal semen quality (n=26) group. A significant negative correlation was found between PCB 126 and viability in men with low semen quality, while PCBs 77 and 81 were positively correlated with morphology, and PCB 118, mono-ortho and total DL-PCBs were positively correlated with volume...
July 10, 2017: Reproductive Toxicology
https://www.readbyqxmd.com/read/28702904/formation-of-brominated-and-chlorinated-dioxins-and-its-prevention-during-a-pilot-test-of-mechanochemical-treatment-of-pcb-and-pbde-contaminated-soil
#11
Mengnan Lu, Tianwu Lv, Ying Li, Zheng Peng, Giovanni Cagnetta, Shouxiang Sheng, Jun Huang, Gang Yu, Roland Weber
The destruction of persistent organic pollutants (POPs) is a large challenge in particular in developing and emerging economies. To date, a detailed assessment of non-combustion technologies with respect to formation of dioxins is lacking. In this study, an assessment of mechanochemical (MC) destruction technology for polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs) in contaminated soil remediation was conducted. Actual applied conditions of pilot-scale MC POPs destruction process indicates that the temperature increase inside the ball mills has the potential to form high levels of toxic polybrominated and polychlorinated dibenzo-p-dioxins and dibenzofurans (PXDD/Fs) when dioxin precursors are present...
July 12, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28701748/gold-nanoparticles-dotted-reduction-graphene-oxide-nanocomposite-based-electrochemical-aptasensor-for-selective-rapid-sensitive-and-congener-specific-pcb77-detection
#12
Lidong Wu, Xianbo Lu, Xiaochen Fu, Lingxia Wu, Huan Liu
Gold nanoparticles (AuNP) dotted reduction graphene oxide (RGO-AuNP) is used as a platform for an aptamer biosensor to selectively detect 3,3'4,4'-polychlorinated biphenyls (PCB77). By anchoring aptamers onto the binding sites of RGO-AuNP and making use of the synergy effect of RGO and AuNP, the RGO-AuNP based biosensor exhibits superior analytical performances to AuNP based biosensor in terms of sensitivity and repeatability. The sensitivity of RGO-AuNP based aptamers (RGO-AuNP-Ap) biosensor (226.8 μA cm(-2)) is nearly two times higher than that of Au based biosensors (AuNP-Ap/Au electrode, 147...
July 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28699004/a-delayed-proinflammatory-response-of-human-preadipocytes-to-pcb126-is-dependent-on-the-aryl-hydrocarbon-receptor
#13
Francoise A Gourronc, Larry W Robertson, Aloysius J Klingelhutz
Inflammation in adipose tissue is recognized as a causative factor in the development of type II diabetes. Adipocyte hypertrophy as well as bacterial and environmental factors have been implicated in causing inflammation in mature adipocytes. Exposure to persistent organic pollutants such as polychlorinated biphenyls (PCBs) has been associated with the development of type II diabetes. We show here that PCB126, a dioxin-like PCB, activates a robust proinflammatory state in fat cell precursors (preadipocytes)...
July 11, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28697428/temporal-and-spatial-variation-of-polychlorinated-biphenyls-pcbs-contamination-in-environmental-compartments-of-highly-polluted-area-in-central-russia
#14
Natalia Malina, Elena A Mazlova
This study highlights the fact that serious contamination from polychlorinated biphenyls (PCBs) still exists in Serpukhov City (Russia). The research help to determine the temporal (16- and 24-year periods) and spatial PCBs distribution in the environmental compartments of the studied region. Samples of soil, sediments, water and plants were analysed in order to establish their contamination levels. The most recent data on the Serpukhov City's soil contamination showed that the PCBs concentrations varies from 0...
July 2, 2017: Chemosphere
https://www.readbyqxmd.com/read/28695493/effect-of-lower-chlorinated-hydroxylated-polychlorobiphenyls-on-development-of-pc12-cells
#15
Satomi Mizukami-Murata, Katsuhide Fujita, Takeshi Nakano
Hydroxylated polychlorobiphenyls (OH-PCBs) are major metabolites of PCBs that are widely distributed in the environment. While the effects of penta- to hepta-chlorinated OH-PCBs on neuronal differentiation have been widely reported, those of lower chlorinated OH-PCBs have not been extensively studied. To investigate the effects of lower chlorinated OH-PCBs on neuronal development, we studied the effects of mono- to hexa-chlorinated OH-PCBs on PC12 cells. Morphological changes were examined using an automatic system IN Cell Analyzer...
July 10, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28686896/high-cancer-risks-by-exposure-to-pcdd-fs-in-the-neighborhood-of-an-integrated-waste-management-facility
#16
José L Domingo, Joaquim Rovira, Martí Nadal, Marta Schuhmacher
In 2014, we conducted a study aimed at screening the concentrations of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs), polychlorinated biphenyls (PCBs) and various trace elements in air and soil samples collected in an urban area of Sant Adrià de Besòs (Barcelona, Spain) in the vicinity of an Integrated Waste Management Facility (IWMF). It consists of a mechanical-biological treatment plant (MBT) and an old municipal solid waste incinerator (MSWI). Human health risks for the population living in the area were also assessed...
July 4, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28686496/polychlorinated-biphenyls-and-polychlorinated-dioxins-furans-in-lake-trout-and-whitefish-composite-samples-from-commercial-fisheries-in-lakes-erie-huron-and-superior
#17
Dorothea F K Rawn, Michael Dowd, Matthew J S Scuby, Peter P Pantazopoulos, Mark Feeley
Polychlorinated biphenyls (PCBs; sum of 36 congeners) and polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs; sum of 17 2,3,7,8-substituted congeners) were measured in 93 composite samples prepared from individual lake trout (Salvelinus namaycush) and whitefish (Coregonus clupeaformis) samples collected from Lake Erie, Lake Huron, and Lake Superior. All samples had detectable concentrations of PCBs and PCDD/Fs; maximum PCB concentrations in both trout (750 ng g(-1) whole weight [ww]) and whitefish (210 ng g(-1) ww) were found in composites from fish collected from Lake Huron...
July 7, 2017: Journal of Food Protection
https://www.readbyqxmd.com/read/28686017/analysis-and-characterization-of-polychlorinated-hydroxybornanes-as-metabolites-of-toxaphene-using-polar-bear-model
#18
Lea Reger, Christoph Gallistl, Karl Skirnisson, Walter Vetter
Abiotic and biotic transformation of toxaphene (camphechlor) results in the selective enrichment of recalcitrant congeners while other, less persistent compounds of technical toxaphene (CTTs) are degraded. Up to now there is little knowledge on oxidation transformation of toxaphene. For instance, existence of hydroxylated CTTs (OH-CTTs) in authentic environmental and food samples was not proven yet. For this reason, we synthesized a mixture consisting of tetra- to heptachlorinated OH-CTTs and simplified it by countercurrent chromatography (CCC)...
July 7, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28682597/the-effect-of-microplastic-on-the-uptake-of-chemicals-by-the-lugworm-arenicola-marina-l-under-environmentally-relevant-exposure-conditions
#19
Ellen Besseling, Edwin M Foekema, Martine J Van Den Heuvel-Greve, Albert A Koelmans
It has been hypothesized that ingestion of microplastic increases exposure of aquatic organisms to hydrophobic contaminants. To date, most laboratory studies investigated chemical transfer from ingested microplastic without taking other exposure pathways into account. Therefore we studied the effect of polyethylene (PE) microplastic in sediment on PCB uptake by Arenicola marina as a model species, quantifying uptake fluxes from all natural exposure pathways. PCB concentrations in sediment, biota lipids (Clip) and porewater measured with passive samplers were used to derive lipid-normalized bioaccumulation metrics Clip, Biota sediment accumulation factor (BSAF), Bioaccumulation factor (BAF) and the Biota plastic accumulation factor (BPAF)...
July 6, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28681163/bioaccumulation-of-polychlorinated-biphenyls-pcbs-in-atlantic-sea-bream-archosargus-rhomboidalis-from-kingston-harbour-jamaica
#20
Ann-Tenneil O'Connor, Dwight Robinson, Tara P Dasgupta, Aaron T Fisk, Ken G Drouillard
Multiple sizes of Sea bream were collected from Kingston Harbour, Jamaica, to assess steady state bioaccumulation of polychlorinated biphenyls (PCBs) in a tropical fish. Sea beam fork lengths ranged from 7.3 to 21.5 cm (n = 36 fish) and tissue lipids decreased with body length. Larger fish had lower δ(13)C isotopes compared to smaller fish, suggesting a change in diet. Linear regressions showed no differences in lipid equivalent sum PCB concentrations with size. However, differences in individual congener bioaccumulation trajectories occurred...
July 5, 2017: Bulletin of Environmental Contamination and Toxicology
keyword
keyword
37548
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"