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Environmental Pollution

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https://www.readbyqxmd.com/read/27913071/determination-and-validation-of-an-aquatic-maximum-acceptable-concentration-environmental-quality-standard-mac-eqs-value-for-the-agricultural-fungicide-azoxystrobin
#1
Elsa Teresa Rodrigues, Miguel Ângelo Pardal, Cristiano Gante, João Loureiro, Isabel Lopes
The main goal of the present study was to determine and validate an aquatic Maximum Acceptable Concentration-Environmental Quality Standard (MAC-EQS) value for the agricultural fungicide azoxystrobin (AZX). Assessment factors were applied to short-term toxicity data using the lowest EC50 and after the Species Sensitivity Distribution (SSD) method. Both ways of EQS generation were applied to a freshwater toxicity dataset for AZX based on available data, and to marine toxicity datasets for AZX and Ortiva(®) (a commercial formulation of AZX) obtained by the present study...
November 29, 2016: Environmental Pollution
https://www.readbyqxmd.com/read/27913070/basagran-%C3%A2-induces-developmental-malformations-and-changes-the-bacterial-community-of-zebrafish-embryos
#2
Jacinta M M Oliveira, Victor Galhano, Isabel Henriques, Amadeu M V M Soares, Susana Loureiro
This study aimed to assess the effects of Basagran(®) on zebrafish (Danio rerio) embryos. The embryos were exposed to Basagran(®) at concentrations ranging from 120.0 to 480.6 mg/L, and the effects on embryo development (up to 96 h) and bacterial communities of 96 h-larvae were assessed. The embryo development response was time-dependent and concentration-dependent (106.35 < EC50 < 421.58 mg/L). The sensitivity of embryo-related endpoints decreased as follows: blood clotting in the head and/or around the yolk sac > delay or anomaly in yolk sac absorption > change in swimming equilibrium > development of pericardial and/or yolk sac oedema > scoliosis...
November 29, 2016: Environmental Pollution
https://www.readbyqxmd.com/read/27908488/accumulation-of-cadmium-and-uranium-in-arable-soils-in-switzerland
#3
Moritz Bigalke, Andrea Ulrich, Agnes Rehmus, Armin Keller
Mineral phosphorus (P) fertilizers contain contaminants that are potentially hazardous to humans and the environment. Frequent mineral P fertilizer applications can cause heavy metals to accumulate and reach undesirable concentrations in agricultural soils. There is particular concern about Cadmium (Cd) and Uranium (U) accumulation because these metals are toxic and can endanger soil fertility, leach into groundwater, and be taken up by crops. We determined total Cd and U concentrations in more than 400 topsoil and subsoil samples obtained from 216 agricultural sites across Switzerland...
November 28, 2016: Environmental Pollution
https://www.readbyqxmd.com/read/27908487/mercury-exposure-and-source-tracking-in-distinct-marine-caged-fish-farm-in-southern-china
#4
Xiaoyu Xu, Wen-Xiong Wang
Coasts of South China have experienced an unprecedented growth in its marine-caged fish industry. We analyzed mercury concentrations and stable mercury isotope ratios in fourteen fish species from two cage-cultured farms in Southern China. Total mercury concentrations of all species were lower than the human health screening values, but the human exposures through consumption of several carnivorous fish exceeded the USEPA's reference dose. Isotopic compositions in the sediment (δ(202)Hg: -1.45‰ to -1.23‰; Δ(199)Hg: -0...
November 28, 2016: Environmental Pollution
https://www.readbyqxmd.com/read/27899209/with-the-noose-around-the-neck-marine-debris-entangling-otariid-species
#5
Valentina Franco-Trecu, Massimiliano Drago, Helena Katz, Emanuel Machín, Yamandú Marín
Plastic debris in marine environments and its impact on wildlife species is becoming a problem of increasing concern. In pinnipeds, entanglements commonly consist of loops around the neck of non-biodegradable materials from fishing gear or commercial packaging, known as "neck collars". These entanglements can cause injuries, death by suffocation and starvation, and therefore they may add to the overall decrease in population. Our objective was to describe the entanglement of two species of otariids (Arctocephalus australis and Otaria flavescens) in the South West Atlantic Ocean...
November 26, 2016: Environmental Pollution
https://www.readbyqxmd.com/read/27894722/impact-of-bio-palladium-nanoparticles-bio-pd-nps-on-the-activity-and-structure-of-a-marine-microbial-community
#6
Andrea Nuzzo, Baharak Hosseinkhani, Nico Boon, Giulio Zanaroli, Fabio Fava
Biogenic palladium nanoparticles (bio-Pd NPs) represent a promising catalyst for organohalide remediation in water and sediments. However, the available information regarding their possible impact in case of release into the environment, particularly on the environmental microbiota, is limited. In this study the toxicity of bio-Pd NPs on the model marine bacterium V. fischeri was assessed. The impacts of different concentrations of bio-Pd NPs on the respiratory metabolisms (i.e. organohalide respiration, sulfate reduction and methanogenesis) and the structure of a PCB-dechlorinating microbial community enriched form a marine sediment were also investigated in microcosms mimicking the actual sampling site conditions...
November 25, 2016: Environmental Pollution
https://www.readbyqxmd.com/read/27890587/multiple-mechanisms-of-heavy-metal-tolerance-are-differentially-expressed-in-ecotypes-of-artemisia-fragrans
#7
Esmira Alirzayeva, Gunter Neumann, Walter Horst, Yagut Allahverdiyeva, Andre Specht, Valida Alizade
Artemisia fragrans is a plant species with ability of growing on heavy metal-polluted soils. Ecotypes of this species naturally growing in polluted areas can accumulate and tolerate different amounts of heavy metals (HM), depending on soil contamination level at their origin. Heavy metal tolerance of various ecotypes collected from contaminated (AP, SP) and non-contaminated (BG) sites was compared by cultivation on a highly HM-contaminated river sediment and a non-contaminated agricultural control soil. Tissue-specific HM distribution was analyzed by laser ablation-inductively-coupled plasma-mass spectroscopy (LA-ICP-MS) and photosynthetic activity by non-invasive monitoring of chlorophyll fluorescence...
November 24, 2016: Environmental Pollution
https://www.readbyqxmd.com/read/27890586/exploring-the-contribution-of-bacteriophages-to-antibiotic-resistance
#8
Itziar Lekunberri, Jèssica Subirats, Carles M Borrego, José Luis Balcázar
Bacteriophages (phages) are the most abundant and diverse biological entities in our planet. They infect susceptible bacterial hosts into which they either multiply or persist. In the latter case, phages can confer new functions to their hosts as a result of gene transfer, thus contributing to their adaptation (short-term) and evolution (long-term). In this regard, the role of phages on the dissemination of antibiotic resistance genes (ARGs) among bacterial hosts in natural environments has not yet been clearly resolved...
November 24, 2016: Environmental Pollution
https://www.readbyqxmd.com/read/27890585/cadmium-in%C3%A2-vivo-exposure-alters-stress-response-and-endocrine-related-genes-in-the-freshwater-snail-physa-acuta-new-biomarker-genes-in-a-new-model-organism
#9
Pedro Martínez-Paz, Mónica Morales, Paloma Sánchez-Argüello, Gloria Morcillo, José Luis Martínez-Guitarte
The freshwater snail Physa acuta is a sensitive organism to xenobiotics that is appropriate for toxicity testing. Cadmium (Cd) is a heavy metal with known toxic effects on several organisms, which include endocrine disruption and activation of the cellular stress responses. There is scarce genomic information on P. acuta; hence, in this work, we identify several genes related to the hormonal system, the stress response and the detoxification system to evaluate the effects of Cd. The transcriptional activity of the endocrine-related genes oestrogen receptor (ER), oestrogen-related receptor (ERR), and retinoid X receptor (RXR), the heat shock proteins genes hsp70 and hsp90 and a metallothionein (MT) gene was analysed in P...
November 24, 2016: Environmental Pollution
https://www.readbyqxmd.com/read/27889087/characterisation-of-the-phenanthrene-degradation-related-genes-and-degrading-ability-of-a-newly-isolated-copper-tolerant-bacterium
#10
Mengke Song, Ying Yang, Longfei Jiang, Qing Hong, Dayi Zhang, Zhenguo Shen, Hua Yin, Chunling Luo
A copper-tolerant phenanthrene (PHE)-degrading bacterium, strain Sphingobium sp. PHE-1, was newly isolated from the activated sludge in a wastewater treatment plant. Two key genes, ahdA1b-1 encoding polycyclic aromatic hydrocarbon ring-hydroxylating dioxygenase (PAH-RHDɑ) and xyLE encoding catechol-2,3-dioxygenase (C23O), involved in the PHE metabolism by strain PHE-1 were identified. The PAH-RHD gene cluster showed 96% identity with the same cluster of Sphingomonas sp. P2. Our results indicated the induced transcription of xylE and ahdA1b-1 genes by PHE, simultaneously promoted by Cu(II)...
November 23, 2016: Environmental Pollution
https://www.readbyqxmd.com/read/27889086/impacts-of-regional-transport-on-black-carbon-in-huairou-beijing-china
#11
Yuqin Wang, Benjamin de Foy, James J Schauer, Michael R Olson, Yang Zhang, Zhengqiang Li, Yuanxun Zhang
The 22(nd) Asia-Pacific Economic Cooperation (APEC) Conference was held near Yanqi Lake, Huairou, in Beijing, China during November 10-11, 2014. To guarantee haze-free days during the APEC Conference, the Beijing government and the governments of the surrounding provinces implemented a series of controls. Three months of Aethalometer 880 nm black carbon (BC) measurements were examined to understand the hourly fluctuations in BC concentrations that resulted from emission controls and meteorology changes. Measurements were collected at the University of Chinese Academy of Sciences near the APEC Conference site and in Central Beijing at the Institute of Remote Sensing and Digital Earth of the Chinese Academy of Sciences...
November 23, 2016: Environmental Pollution
https://www.readbyqxmd.com/read/27889085/impact-of-diurnal-variability-and-meteorological-factors-on-the-pm2-5-aod-relationship-implications-for-pm2-5-remote-sensing
#12
Jianping Guo, Feng Xia, Yong Zhang, Huan Liu, Jing Li, Mengyun Lou, Jing He, Yan Yan, Fu Wang, Min Min, Panmao Zhai
PM2.5 retrieval from space is still challenging due to the elusive relationship between PM2.5 and aerosol optical depth (AOD), which is further complicated by meteorological factors. In this work, we investigated the diurnal cycle of PM2.5 in China, using ground-based PM measurements obtained at 226 sites of China Atmosphere Watch Network during the period of January 2013 to December 2015. Results showed that nearly half of the sites witnessed a PM2.5 maximum in the morning, in contrast to the least frequent occurrence (5%) in the afternoon when strong solar radiation received at the surface results in rapid vertical diffusion of aerosols and thus lower mass concentration...
November 23, 2016: Environmental Pollution
https://www.readbyqxmd.com/read/27884469/chinese-province-scale-source-apportionments-for-sulfate-aerosol-in-2005-evaluated-by-the-tagged-tracer-method
#13
Syuichi Itahashi, Hiroshi Hayami, Keiya Yumimoto, Itsushi Uno
Appropriate policies to improve air quality by reducing anthropogenic emissions are urgently needed. This is typified by the particulate matter (PM) problem and it is well known that one type of PM, sulfate aerosol (SO4(2-)), has a large-scale impact due to long range transport. In this study we evaluate the source-receptor relationships of SO4(2-) over East Asia for 2005, when anthropogenic sulfur dioxide (SO2) emissions from China peaked. SO2 emissions from China have been declining since 2005-2006, so the possible maximum impact of Chinese contributions of SO4(2-) is evaluated...
November 22, 2016: Environmental Pollution
https://www.readbyqxmd.com/read/27884472/impact-of-untreated-wastewater-on-a-major-european-river-evaluated-with-a-combination-of-in%C3%A2-vitro-bioassays-and-chemical-analysis
#14
Maria König, Beate I Escher, Peta A Neale, Martin Krauss, Klára Hilscherová, Jiří Novák, Ivana Teodorović, Tobias Schulze, Sven Seidensticker, Muhammad Arslan Kamal Hashmi, Jörg Ahlheim, Werner Brack
Complex mixtures of micropollutants, including pesticides, pharmaceuticals and industrial chemicals emitted by wastewater effluents to European rivers may compromise the quality of these water resources and may pose a risk to ecosystem health and abstraction of drinking water. In the present study, an integrated analytical and bioanalytical approach was applied to investigate the impact of untreated wastewater effluents from the city of Novi Sad, Serbia, into the River Danube. The study was based on three on-site large volume solid phase extracted water samples collected upstream and downstream of the untreated wastewater discharge...
November 21, 2016: Environmental Pollution
https://www.readbyqxmd.com/read/27884471/polybrominated-diphenyl-ethers-pbdes-and-hexa-brominated-biphenyls-hexa-bbs-in-fresh-foods-ingested-in-taiwan
#15
Jung-Wei Chang, Chung-Feng Hung, Ya-Chen Hsu, Yi-Ting Kao, Ching-Chang Lee
Polybrominated diphenyl ethers (PBDEs) and hexa-brominated biphenyls (Hexa-BBs) are bioaccumulative and aggregate in the food chain. Therefore, background monitoring and risk assessment for dietary intake are necessary. In present study, a systematic sampling method was first used to collect the high fat content foodstuff such as poultry, livestock, eggs, fish, other seafood, dairy products, and the infant foods and then foodstuff with high consumption in seven categories of 600 food samples. After integrating four years of background surveys of PBDE levels (2010-2013) and one year of that of Hexa-BBs (2013), the highest estimated daily intake (EDI) of PBDEs for Taiwanese food consumption was found in 0- to 3-year-olds (mean = 9...
November 21, 2016: Environmental Pollution
https://www.readbyqxmd.com/read/27884470/the-first-exposure-assessment-of-legacy-and-unrestricted-brominated-flame-retardants-in-predatory-birds-of-pakistan
#16
Naeem Akhtar Abbasi, Igor Eulaers, Veerle Leontina Bernard Jaspers, Muhammad Jamshed Iqbal Chaudhry, Adrien Frantz, Per Lennart Ambus, Adrian Covaci, Riffat Naseem Malik
The exposure to legacy polybrominated diphenyl ethers (PBDEs), hexabromocyclododecanes (HBCDDs) and unrestricted 1,2-bis (2,4,6-tribromophenoxy) ethane (BTBPE), bis (2-ethylhexyl)-2,3,4,5-tetrabromophthalate (BEH-TEBP) and 2-ethylhexyl-2,3,4,5-tetrabromo-benzoate (EH-TBB) was examined in tail feathers of 76 birds belonging to ten predatory species inhabiting Pakistan. In addition, different feather types of six individuals of Black kite (Milvus migrans) were compared for their brominated flame retardant (BFR) levels...
November 21, 2016: Environmental Pollution
https://www.readbyqxmd.com/read/27884468/corrigendum-to-endosulfan-pentachlorobenzene-and-short-chain-chlorinated-paraffins-in-background-soils-from-western-europe-environ-pollut-196-2015-21-28
#17
Anne Karine Halse, Martin Schlabach, Jasmin K Schuster, Kevin C Jones, Eiliv Steinnes, Knut Breivik
No abstract text is available yet for this article.
November 21, 2016: Environmental Pollution
https://www.readbyqxmd.com/read/27884467/elucidating-ozonation-mechanisms-of-organic-micropollutants-based-on-dft-calculations-taking-sulfamethoxazole-as-a-case
#18
Siyu Zhang, Gang Yu, Jingwen Chen, Qing Zhao, Xuejiao Zhang, Bin Wang, Jun Huang, Shubo Deng, Yujue Wang
Ozonation is widely used in wastewater treatment plants to remove diverse organic micropollutants. As molecular structures of organic micropollutants contain multiple ozone-preferred reaction sites, and moreover intermediate products can react with ozone again, ozonation mechanism is complex. A fast increasing number of organic micropollutants and a great demand of ecological risk assessments call for an in silico method to provide insights into the ozonation mechanism of organic micropollutants. Here, an in silico model was developed to unveil ozonation mechanisms of organic micropollutants...
November 21, 2016: Environmental Pollution
https://www.readbyqxmd.com/read/27884466/linking-pollutant-exposure-of-humpback-whales-breeding-in-the-indian-ocean-to-their-feeding-habits-and-feeding-areas-off-antarctica
#19
Krishna Das, Govindan Malarvannan, Alin Dirtu, Violaine Dulau, Magali Dumont, Gilles Lepoint, Philippe Mongin, Adrian Covaci
Humpback whales, Megaptera novaeangliae, breeding off la Reunion Island (Indian Ocean) undergo large-scale seasonal migrations between summer feeding grounds near Antarctica and their reproductive winter grounds in the Indian Ocean. The main scope of the current study was to investigate chemical exposure of humpback whales breeding in the Indian Ocean by providing the first published data on this breeding stock concerning persistent organic pollutants (POPs), namely polychlorinated biphenyls (PCBs), hexachlorobenzene (HCB), hexachlorocyclohexanes (HCHs), DDT and its metabolites (DDTs), chlordane compounds (CHLs), polybrominated diphenyl ethers (PBDEs), and methoxylated PBDEs (MeO-PBDEs)...
November 21, 2016: Environmental Pollution
https://www.readbyqxmd.com/read/27876419/assessing-the-potential-of-inorganic-anions-cl-no3-so4-2-and-po4-3-to-increase-the-bioaccessibility-of-emitted-palladium-in-the-environment-experimental-studies-with-soils-and-a-pd-model-substance
#20
Fathi Zereini, Clare L S Wiseman, Jana Poprizki, Peter Albers, Wolfgang Schneider, Kerstin Leopold
Palladium (Pd) emitted from vehicles equipped with exhaust catalytic converters has been accumulating at a greater rate relative to other platinum group elements (PGE) in the last 10-20 years. Little is known, however, regarding the various environmental factors and conditions which are likely to modulate the chemical behavior and bioaccessibility of this element post-emission. To meet data needs, soils and a Pd model substance were treated with solutions containing common anions (Cl(-), NO3(-), SO4(2-) und PO4(3-)) to shed light on the geochemical behavior of emitted Pd under ambient conditions...
November 19, 2016: Environmental Pollution
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