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https://www.readbyqxmd.com/read/29454282/contaminants-of-emerging-concern-presence-and-adverse-effects-in-fish-a-case-study-in-the-laurentian-great-lakes
#1
Zachary G Jorgenson, Linnea M Thomas, Sarah M Elliott, Jenna E Cavallin, Eric C Randolph, Steven J Choy, David A Alvarez, Jo A Banda, Daniel J Gefell, Kathy E Lee, Edward T Furlong, Heiko L Schoenfuss
The Laurentian Great Lakes are a valuable natural resource that is affected by contaminants of emerging concern (CECs), including sex steroid hormones, personal care products, pharmaceuticals, industrial chemicals, and new generation pesticides. However, little is known about the fate and biological effects of CECs in tributaries to the Great Lakes. In the current study, 16 sites on three rivers in the Great Lakes basin (Fox, Cuyahoga, and Raquette Rivers) were assessed for CEC presence using polar organic chemical integrative samplers (POCIS) and grab water samplers...
February 14, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29454238/transformations-of-dissolved-organic-matter-induced-by-uv-photolysis-hydroxyl-radicals-chlorine-radicals-and-sulfate-radicals-in-aqueous-phase-uv-based-advanced-oxidation-processes
#2
Lathika Varanasi, Erica Coscarelli, Maryam Khaksari, Lynn R Mazzoleni, Daisuke Minakata
Considering the increasing identification of trace organic contaminants in natural aquatic environments, the removal of trace organic contaminants from water or wastewater discharge is an urgent task. Ultraviolet (UV) and UV-based advanced oxidation processes (AOPs), such as UV/hydrogen peroxide (UV/H 2 O 2 ), UV/free chlorine and UV/persulfate, are attractive and promising approaches for the removal of these contaminants due to the high reactivity of active radical species produced in these UV-AOPs with a wide variety of organic contaminants...
February 8, 2018: Water Research
https://www.readbyqxmd.com/read/29454232/effects-of-mine-tailing-and-mixed-contamination-on-metals-trace-elements-accumulation-and-histopathology-of-the-chub-squalius-cephalus-tissues-evidence-from-three-differently-contaminated-sites-in-serbia
#3
Božidar Rašković, Vesna Poleksić, Stefan Skorić, Katarina Jovičić, Slađana Spasić, Aleksandar Hegediš, Nebojša Vasić, Mirjana Lenhardt
Chub (Squalius cephalus) specimens were collected in Korenita River seven months after spillover from the waste water of antimony mine tailing pond and compared with chub living in Kruščica reservoir (intended for water supply) and Međuvršje reservoir (influenced by intense emission of industrial, urban and rural wastewater). Concentrations of 15 elements (Al, As, B, Ba, Cd, Cr, Cu, Fe, Hg, Mn, Ni, Pb, Si, Sr, Zn) were determined in muscle, liver and gills of chub by inductively coupled plasma optical spectrometry (ICP-OES) and histopathological alterations in liver and gills were assessed...
February 14, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29454213/spatio-temporal-comparison-of-neustonic-microplastic-density-in-hong-kong-waters-under-the-influence-of-the-pearl-river-estuary
#4
Pui Kwan Cheung, Lincoln Fok, Pui Lam Hung, Lewis T O Cheung
Rivers are recognised as an important source of plastic debris in the open sea. The Pearl River in China is estimated to transport 0.1milliontonnes of plastic waste to the open sea annually. However, no empirical study has been conducted to assess the plastic contamination levels in the Pearl River Estuary. Hong Kong is situated in the east of the Pearl River Estuary; its western waters are strongly influenced by river discharge, whereas the eastern waters are unaffected by the freshwater plume. In this study, we quantified the neustonic plastic debris density in the western and eastern waters of Hong Kong...
February 14, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29454209/reconciling-discrepancies-in-the-source-characterization-of-vocs-between-emission-inventories-and-receptor-modeling
#5
Jiamin Ou, Junyu Zheng, Zibing Yuan, Dabo Guan, Zhijiong Huang, Fei Yu, Min Shao, Peter K K Louie
Emission inventory (EI) and receptor model (RM) are two of the three source apportionment (SA) methods recommended by Ministry of Environment of China and used widely to provide independent views on emission source identifications. How to interpret the mixed results they provide, however, were less studied. In this study, a cross-validation study was conducted in one of China's fast-developing and highly populated city cluster- the Pearl River Delta (PRD) region. By utilizing a highly resolved speciated regional EI and a region-wide gridded volatile organic compounds (VOCs) speciation measurement campaign, we elucidated underlying factors for discrepancies between EI and RM and proposed ways for their interpretations with the aim to achieve a scientifically plausible source identification...
February 14, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29454204/scanning-vertical-distributions-of-typical-aerosols-along-the-yangtze-river-using-elastic-lidar
#6
Shidong Fan, Cheng Liu, Zhouqing Xie, Yunsheng Dong, Qihou Hu, Guangqiang Fan, Zhengyi Chen, Tianshu Zhang, Jingbo Duan, Pengfei Zhang, Jianguo Liu
In recent years, China has experienced heavy air pollution, especially haze caused by particulate matter (PM). The compositions, horizontal distributions, transport, and chemical formation mechanisms of PM and its precursors have been widely investigated in China based on near-ground measurements. However, the understanding of the distributions and physical and chemical processes of PM in the vertical direction remains limited. In this study, an elastic lidar was employed to investigate the vertical profiles of aerosols along the Yangtze River during the Yangtze River Campaign of winter 2015...
February 14, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29454203/metals-and-arsenic-in-fish-from-a-ramsar-site-under-past-and-present-human-pressures-consumption-risk-factors-to-the-local-population
#7
Paloma Kachel Gusso-Choueri, Giuliana Seraphim de Araújo, Ana Carolina Feitosa Cruz, Tatiana Roselena de Oliveira Stremel, Sandro Xavier de Campos, Denis Moledo de Souza Abessa, Ciro Alberto de Oliveira Ribeiro, Rodrigo Brasil Choueri
The risk of metals and As in seafood for traditional populations living in a Marine Protected Areas (MPA) is seldom assessed, although the risk of human exposure to contaminants is one of the indicators associated with the socioeconomic goals of MPAs. The current study aimed to estimate the potential risk of some metals (Cd, Pb, and Zn) and arsenic (As) for human health through the ingestion of fish locally harvested in a Ramsar site, the Cananéia-Iguape-Peruíbe Environmental Protected Area (APA-CIP). Previous studies showed environmental impacts in this area due to former mining activities and urbanization...
February 14, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29454199/benthic-nitrite-exchanges-in-the-seine-river-france-an-early-diagenetic-modeling-analysis
#8
Zahra Akbarzadeh, Anniet M Laverman, Fereidoun Rezanezhad, Mélanie Raimonet, Eric Viollier, Babak Shafei, Philippe Van Cappellen
Nitrite is a toxic intermediate compound in the nitrogen (N) cycle. Elevated concentrations of nitrite have been observed in the Seine River, raising questions about its sources and fate. Here, we assess the role of bottom sediments as potential sources or sinks of nitrite along the river continuum. Sediment cores were collected from two depocenters, one located upstream, the other downstream, from the largest wastewater treatment plant (WWTP) servicing the conurbation of Paris. Pore water profiles of oxygen, nitrate, nitrite and ammonium were measured...
February 14, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29453676/properties-of-bacterial-communities-attached-to-artificial-substrates-in-a-hypereutrophic-urban-river
#9
Xianlei Cai, Ling Yao, Qiyue Sheng, Luyao Jiang, Randy A Dahlgren, Ting Wang
Bacterial communities of biofilms growing on artificial substrates were examined at two time periods (7 and 14 days) and two locations (lentic and lotic areas) in a hypereutrophic urban river of eastern China. Previous studies in this river network indicated that variations of microbial communities were the major factor affecting the distribution of antibiotic resistant genes highlighting the importance of understanding controls of microbial communities. Bacterial communities associated with biofilms were determined using epifluorescence microscopy and high-throughput sequencing...
February 16, 2018: AMB Express
https://www.readbyqxmd.com/read/29453648/supplemental-diagnosis-of-gyrodactylus-fairporti-van-cleave-1921-monogenea-from-1-month-old-black-bullhead-ameiurus-melas-in-riverside-pools-in-wisconsin
#10
Eric Leis, Russell Easy, David Cone
Samples of Gyrodactylus fairporti Van Cleave, 1921 from young-of-the-year black bullhead (Ameiurus melas) stranded in riverside pools of the Black River (La Crosse County,) WI, USA, are used to supplement the species diagnosis, including new details on the marginal hook sickles, the male copulatory organ (MCO), and 18S rRNA gene sequence data. The anchors of G. fairporti are relatively long and thin, 58.2 ± 1.2 μm in length; roots 15.5 ± 1.0 μm; shaft 38.1 ± 1.5 μm; point 31.3 ± 1.5 μm. The ventral bar is 19...
February 17, 2018: Parasitology Research
https://www.readbyqxmd.com/read/29453646/estimation-of-radionuclide-concentrations-and-average-annual-committed-effective-dose-due-to-ingestion-for-the-population-in-the-red-river-delta-vietnam
#11
Tran Thi Van, Luu Tam Bat, Dang Duc Nhan, Nguyen Hao Quang, Bui Duy Cam, Luu Viet Hung
Radioactivity concentrations of nuclides of the 232 Th and 238 U radioactive chains and 40 K, 90 Sr, 137 Cs, and 239+240 Pu were surveyed for raw and cooked food of the population in the Red River delta region, Vietnam, using α-, γ-spectrometry, and liquid scintillation counting techniques. The concentration of 40 K in the cooked food was the highest compared to those of other radionuclides ranging from (23 ± 5) (rice) to (347 ± 50) Bq kg -1 dw (tofu). The 210 Po concentration in the cooked food ranged from its limit of detection (LOD) of 5 mBq kg -1 dw (rice) to (4...
February 16, 2018: Environmental Management
https://www.readbyqxmd.com/read/29453186/high-intake-rates-of-microplastics-in-a-western-atlantic-predatory-fish-and-insights-of-a-direct-fishery-effect
#12
Guilherme V B Ferreira, Mário Barletta, André R A Lima, Simon A Morley, Anne K S Justino, Monica F Costa
Microplastic contamination was investigated in the gut contents of an economically important estuarine top predator, Cynoscion acoupa, according to spatiotemporal and ontogenetic use of a tropical estuary. Microplastic contamination was found in more than half of the analysed fish. Ingested microplastics were classified by type, colour and length with most of the particles consisting of filaments (<5 mm). Longer filaments were more frequently ingested in the upper estuary and smaller filaments in the lower estuary, as a result of differences in hydrodynamic forces and proximity to the probable input sources...
February 13, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29453178/seasonal-dynamics-of-tetracycline-resistance-gene-transport-in-the-sumas-river-agricultural-watershed-of-british-columbia-canada
#13
Patricia L Keen, Charles W Knapp, Kenneth J Hall, David W Graham
Environmental transport of contaminants that can influence the development of antibiotic resistance in bacteria is an important concern in the management of ecological and human health risks. Agricultural regions are locales where practices linked to food crop and livestock production can introduce contaminants that could alter the selective pressures for the development of antibiotic resistance in microbiota. This is important in regions where the use of animal manure or municipal biosolids as waste and/or fertilizer could influence selection for antibiotic resistance in pathogenic bacterial species...
February 13, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29453174/antibiotic-resistance-along-an-urban-river-impacted-by-treated-wastewaters
#14
Lorenzo Proia, Adriana Anzil, Jessica Subirats, Carles Borrego, Marinella Farrè, Marta Llorca, Jose Luis Balcázar, Pierre Servais
Urban rivers are impacted ecosystems which may play an important role as reservoirs for antibiotic-resistant (AR) bacteria. The main objective of this study was to describe the prevalence of antibiotic resistance along a sewage-polluted urban river. Seven sites along the Zenne River (Belgium) were selected to study the prevalence of AR Escherichia coli and freshwater bacteria over a 1-year period. Culture-dependent methods were used to estimate E. coli and heterotrophic bacteria resistant to amoxicillin, sulfamethoxazole, nalidixic acid and tetracycline...
February 13, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29453117/performance-of-integrated-ferrate-polyaluminum-chloride-coagulation-as-a-treatment-technology-for-removing-freshwater-humic-substances
#15
Mitsuru Amano, Jenyuk Lohwacharin, Alice Dubechot, Satoshi Takizawa
Ferrate-based technologies can play versatile roles in water treatment because of their potential for in situ production and because they do not form any harmful by-products. We compared the oxidative performance of Fe(VI) generated by an electrochemical process, with H 2 O 2 -UV irradiation (a standard oxidation process) for removing Suwannee River natural organic matter. It took only 5 min for Fe(VI) (Fe: 1.67 × 10 -4 M) to reduce the fluorescence intensity of a humic-like fluorophore by 36% of the original value; in contrast, it took 120 min of irradiation using H 2 O 2 -UV ([OH] ∼ 1...
February 13, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29453116/developing-a-methodology-for-real-time-trading-of-water-withdrawal-and-waste-load-discharge-permits-in-rivers
#16
Maryam Soltani, Reza Kerachian
In this paper, a new methodology is proposed for the real-time trading of water withdrawal and waste load discharge permits in agricultural areas along the rivers. Total Dissolved Solids (TDS) is chosen as an indicator of river water quality and the TDS load that agricultural water users discharge to the river are controlled by storing a part of return flows in some evaporation ponds. Available surface water withdrawal and waste load discharge permits are determined using a non-linear multi-objective optimization model...
February 13, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29453062/heavy-metal-accumulation-risk-assessment-and-integrated-biomarker-responses-of-local-vegetables-a-case-study-along-the-le-an-river
#17
Yong Ji, Peijun Wu, Jie Zhang, Jun Zhang, Youfeng Zhou, Yongwen Peng, Shifeng Zhang, Gaotang Cai, Guiqing Gao
In this research, Ganzhou Chinese Cabbage (Brassica rapa pekinensis), Native Purple Garlic (Allium sativum L) and Leping Radish (Raphanus sativus L) widely planted and distributed along the Le'an River were chosen in the present study. Soil physical-chemical properties, nutrients contents as well as heavy metals elements accumulated in both soils and vegetables collected from 24 sites were analyzed by lab analysis combined with statistical method which was also used for calculation of contamination factor, pollution indexes and hazardous index...
February 8, 2018: Chemosphere
https://www.readbyqxmd.com/read/29452389/parity-associated-with-telomere-length-among-us-reproductive-age-women
#18
A Z Pollack, K Rivers, K A Ahrens
STUDY QUESTION: Is telomere length related to parity among a nationally representative sample of US reproductive age women? SUMMARY ANSWER: History of live birth was associated with shorter telomere length. WHAT IS KNOWN ALREADY: Shorter telomeres have been linked with a range of chronic health conditions and mortality and parity has been associated with health indicators. However, there is a lack of research on how parity relates to telomere length...
February 14, 2018: Human Reproduction
https://www.readbyqxmd.com/read/29451915/synchronic-historical-patterns-of-species-diversification-in-seasonal-aplocheiloid-killifishes-of-the-semi-arid-brazilian-caatinga
#19
Wilson J E M Costa, Pedro F Amorim, José Leonardo O Mattos
The Caatinga is the largest nucleus of seasonally dry tropical forests in South America, but little is known about the evolutionary history and biogeography of endemic organisms. Evolutionary diversification and distribution of terrestrial vertebrates endemic to the Caatinga have been explained by palaeogeographical Neogene episodes, mostly related to changes in the course of the São Francisco River, the largest river in the region. Our objective is to estimate the timing of divergence of two endemic groups of short-lived seasonal killifishes inhabiting all ecoregions of the Caatinga, testing the occurrence of synchronic events of spatial diversification in light of available data on regional palaeogeography...
2018: PloS One
https://www.readbyqxmd.com/read/29450772/dissolved-organic-matter-distribution-and-its-association-with-colloidal-aluminum-and-iron-in-the-selenga-river-basin-from-ulaanbaatar-to-lake-baikal
#20
Morimaru Kida, Orgilbold Myangan, Bolormaa Oyuntsetseg, Viacheslav Khakhinov, Masayuki Kawahigashi, Nobuhide Fujitake
The Selenga River Basin (Mongolia and Russia) has suffered from heavy metal contamination by placer gold mining and urban activities in recent decades. The objectives of this study were to provide the first distribution data of dissolved organic matter (DOM) and humic substances (HS) in this data-scarce region, and to investigate their association with dissolved and colloidal metals. Two sampling campaigns were conducted in August of 2013 and 2014. A constant proportion of HS (%HS; coefficient of variation of 2%) was observed from the headwater of Tuul River to the end of the delta before Lake Baikal, spanning > 1000 km in distance...
February 15, 2018: Environmental Science and Pollution Research International
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