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Archives of Environmental Contamination and Toxicology

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https://www.readbyqxmd.com/read/28315931/polycyclic-aromatic-hydrocarbons-in-mussels-from-a-south-american-estuary
#1
Ana L Oliva, Andrés H Arias, Pamela Y Quintas, Natalia S Buzzi, Jorge E Marcovecchio
Bivalves, especially mussels, have been pointed as putative species to monitor polycyclic aromatic hydrocarbons (PAHs) in marine environment. After several environmental PAHs baseline reports, the present study was conducted to assess for the first time the levels of PAHs in native mussels (Brachidontes rodriguezii) collected from a critical industrialized estuary of Argentina. Under this objective, after an 18-month sampling period, 34 pools of mussels were assessed for 17 PAHs, including the 16 compounds prioritized by United States Environmental Protection Agency...
March 18, 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28275840/evaluating-the-effects-of-metals-on-microorganisms-in-flooded-paddy-soils-using-the-sem-avs-based-approach-and-measurements-of-exchangeable-metal-concentrations
#2
Takashi Kunito, Hitomi Toya, Hirotaka Sumi, Yuichi Ishikawa, Hideshige Toda, Kazunari Nagaoka, Kazutoshi Saeki, Yoshio Aikawa, Satoshi Matsumoto
We examined possible adverse effects of heavy metals on microbial activity, biomass, and community composition using the simultaneously extracted metals (SEM)/acid-volatile sulfide (AVS)-based approach and measurements of exchangeable metal concentrations in three paddy soils (wastewater-contaminated soil, mine-contaminated soil, and noncontaminated soil) incubated for 60 days under flooded conditions. Incubation under flooding increased pH and decreased Eh in all samples. AVS increased when Eh decreased to approximately -200 mV for the mine-contaminated and noncontaminated soils, while the wastewater-contaminated soil originally had a high concentration of AVS despite its air-dried condition...
March 8, 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28271210/feeding-preference-and-sub-chronic-effects-of-zno-nanomaterials-in-honey-bees-apis-mellifera-carnica
#3
Gordana Glavan, Tamara Milivojević, Janko Božič, Kristina Sepčić, Damjana Drobne
The extensive production of zinc oxide (ZnO) nanomaterials (NMs) may result in high environmental zinc burdens. Honeybees need to have special concern due to their crucial role in pollination. Our previous study indicated that low concentrations of ZnO NMs, corresponding to 0.8 mg Zn/mL, have a neurotoxic potential for honeybees after a 10-day oral exposure. Present study was designed to investigate the effect of a short, dietary exposure of honeybees to ZnO NMs at concentrations 0.8-8 mg Zn/mL on consumption rate, food preference, and two enzymatic biomarkers-a stress-related glutathione S-transferase (GST) and the neurotoxicity biomarker acetylcholinesterase (AChE)...
March 7, 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28258485/source-apportionment-of-pm10-bound-polycyclic-aromatic-hydrocarbons-by-positive-matrix-factorization-in-c%C3%A3-rdoba-city-argentina
#4
Ana C Amarillo, Ana C Mateos, Hebe Carreras
The composition and concentration of polycyclic aromatic hydrocarbons (PAHs) adsorbed on particles smaller than 10 microns (PM10) were analyzed in an urban area during a 2-year period from August 2011 to August 2013. Diagnostic ratios (DR) and positive matrix factorization (PMF) were employed to assess emission sources. To discount weather influence, a multiple linear regression model was generated and also a photodecomposition index was calculated for each sample. Despite the fact that mean PM10 levels showed a similar pattern all around the year, majority of PAHs showed higher concentrations during the cold than the warm period, indicating a strong seasonal variation...
March 3, 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28255683/modulation-of-n-methyl-d-aspartate-receptors-nmdar-bcl-2-and-c-fos-gene-expressions-on-exposure-to-individual-and-mixtures-of-low-concentration-metals-in-zebrafish-danio-rerio
#5
Samuel Jerry Cobbina, Guanghua Mao, Ting Zhao, Hai Xu, Zhen Zhang, Hongyang Liu, Yanmin Zou, Xiangyang Wu, Liuqing Yang
Currently, there is limited information on the toxicity of low concentration of metal mixtures in the environment. Of particular interest is the effect of low levels of metal mixtures on neurodevelopment of aquatic organisms. This study reports the neurological gene expressions after exposing zebrafish embryos to low concentration toxic heavy metals, 120 h post fertilization (hpf). Embryos were exposed to low concentration individual and mixtures of lead (Pb), mercury (Hg), arsenic (As), and cadmium (Cd). Quantitative real-time PCR was used to assess gene expressions...
March 2, 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28255682/variation-in-day-of-week-and-seasonal-concentrations-of-atmospheric-pm2-5-bound-metals-and-associated-health-risks-in-bangkok-thailand
#6
Siwatt Pongpiachan, Suixin Liu, Rujin Huang, Zhuzi Zhao, Jittree Palakun, Charnwit Kositanont, Junji Cao
While effective analytical techniques to promote the long-term intensive monitoring campaign of particulate heavy metals have been well established, efforts to interpret these toxic chemical contents into policy are lagging behind. In order to ameliorate the interpretation of evidence into policies, environmental scientists and public health practitioners need innovative methods to emphasize messages concerning adverse health effects to state and local policymakers. In this study, three different types of health risk assessment models categorized by exposure pathways...
March 2, 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28238046/toxicity-of-chromium-vi-to-two-mussels-and-an-amphipod-in-water-only-exposures-with-or-without-a-co-stressor-of-elevated-temperature-zinc-or-nitrate
#7
Ning Wang, James L Kunz, Christopher D Ivey, Christopher G Ingersoll, M Christopher Barnhart, Elizabeth A Glidewell
The objectives of the present study were to develop methods for propagating western pearlshell (Margaritifera falcata) for laboratory toxicity testing and evaluate acute and chronic toxicity of chromium VI [Cr(VI)] to the pearlshell and a commonly tested mussel (fatmucket, Lampsilis siliquoidea at 20 °C or in association with a co-stressor of elevated temperature (27 °C), zinc (50 µg Zn/L), or nitrate (35 mg NO3/L). A commonly tested invertebrate (amphipod, Hyalella azteca) also was tested in chronic exposures...
February 25, 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28229194/screening-level-assessment-of-metal-concentrations-in-streambed-sediments-and-floodplain-soils-within-the-grand-lake-watershed-in-northeastern-oklahoma-usa
#8
Ean M Garvin, Cas F Bridge, Meredith S Garvin
Metal releases have been received by the Grand Lake watershed from the Tri-State Mining District (TSMD) since the mid 1800s. To address data gaps in metal distributions in the Oklahoma portion of the watershed, streambed sediment and floodplain soil was sampled on various streams. The <63-µm fraction was analyzed for Cd, Pb, and Zn concentrations by portable X-ray fluorescence spectroscopy and inductively coupled plasma-mass spectrometry. Mean metal concentration results at reference transects indicated that background sediment/soil concentrations for Cd, Pb, and Zn within the watershed were 0...
February 22, 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28150020/dietary-selenomethionine-administration-in-the-american-alligator-alligator-mississippiensis-hepatic-and-renal-se-accumulation-and-its-effects-on-growth-and-body-condition
#9
John W Finger, Matthew T Hamilton, Travis C Glenn, Tracey D Tuberville
Selenium (Se) is an essential trace nutrient, but in excess, it can induce toxicity. Incomplete combustion of coal produces coal combustion wastes, which are enriched in Se and often disposed of in aquatic basins. While a multitude of studies have investigated Se accumulation in vertebrates, few studies have examined its effects on longer-lived top trophic carnivores, such as the American alligator (Alligator mississippiensis). In this study, alligators were fed one of three Dietary Treatments: mice injected with water (controls) or water supplemented with 1000 or 2000 ppm selenomethionine (SeMet)...
February 1, 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28144697/molecular-characterization-and-expression-analysis-of-p38-mapk-gene-and-protein-in-aquatic-midge-chironomus-riparius-diptera-chironomidae-exposed-to-environmental-contaminants
#10
Sun-Young Park, Jinhee Choi
P38 Mitogen-activated protein kinase (MAPK), an important signaling protein involved in various cellular processes, including stress responses, has been well characterized in model organisms. P38 has been identified in a number of insects, including the genus Drosophila; however, its homologue in Chironomus riparius has not yet been identified. In this study, we identified and characterized p38 MAPK (Crp38) gene in C. riparius using a transcriptome database that was previously generated 454 GS-FLX pyrosequencing...
January 31, 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28132076/monitoring-the-genotoxic-and-cytotoxic-potential-and-the-presence-of-pesticides-and-hydrocarbons-in-water-of-the-sinos-river-basin-southern-brazil
#11
Eloisa Bianchi, Gustavo Lessing, Karisa Roxo Brina, Larissa Angeli, Natália Bordin Andriguetti, Jaqueline Regina Soares Peruzzo, Carlos Augusto do Nascimento, Fernando Rosado Spilki, Ana Luiza Ziulkoski, Luciano Basso da Silva
The Sinos River is one of the most polluted rivers in Brazil. The purpose of this work was to monitor the presence of some pesticides and hydrocarbons as well as the genotoxic and cytotoxic potential on HEp-2 cells from water samples collected at seven sites in the Sinos River Basin (SRB), southern Brazil. Nine samples were taken from the three main rivers in the SRB and used as a solution to dilute the HEp-2 cell culture medium after microfiltration. Twenty-four pesticides and 19 hydrocarbons were measured...
January 28, 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28265713/fate-of-metals-in-relation-to-water-and-sediment-properties-in-a-subtropical-lake-in-central-himalaya-india
#12
Shaikhom Inaotombi, Prem Kumar Gupta
Lakes of Himalaya are one of the most fragile ecosystems on earth. Tourism and urban development in the upland region strongly affect its water resources. The high rate of sedimentation and organic matter deposition alters the ecological state of sediment bed, which indirectly influences on dynamics of metallic elements. We investigated spatial and temporal variations of water and sediment characteristic in Lake Sattal of Central Himalaya, India. Samples were collected seasonally from four sampling locations from January 2011 to December 2012...
April 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28260151/the-effects-of-acute-copper-and-ammonia-challenges-on-ammonia-and-urea-excretion-by-the-blue-crab-callinectes-sapidus
#13
Alex M Zimmer, Marianna Basso Jorge, Chris M Wood, Camila M G Martins, Adalto Bianchini
Copper (Cu) is a persistent environmental contaminant that elicits several physiological disturbances in aquatic organisms, including a disruption in ammonia regulation. We hypothesized that exposure to Cu in a model crustacean (blue crab, Callinectes sapidus) acclimated to brackish water (2 ppt) would lead to hyperammonemia by stimulating an increase in ammonia production and/or by inhibiting ammonia excretion. We further hypothesized that urea production would represent an ammonia detoxification strategy in response to Cu...
April 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28190079/source-apportionment-of-volatile-organic-compounds-in-an-urban-environment-at-the-yangtze-river-delta-china
#14
Junlin An, Junxiu Wang, Yuxin Zhang, Bin Zhu
Volatile organic compounds (VOCs) were collected continuously during June-August 2013 and December 2013-February 2014 at an urban site in Nanjing in the Yangtze River Delta. The positive matrix factorization receptor model was used to analyse the sources of VOCs in different seasons. Eight and seven sources were identified in summer and winter, respectively. In summer and winter, the dominant sources of VOCs were vehicular emissions, liquefied petroleum gas/natural gas (LPG/NG) usage, solvent usage, biomass/biofuel burning, and industrial production...
April 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28105488/effects-of-ceo2-nanoparticles-on-terrestrial-isopod-porcellio-scaber-comparison-of-ceo2-biological-potential-with-other-nanoparticles
#15
Olga Malev, Polonca Trebše, Małgorzata Piecha, Sara Novak, Bojan Budič, Miroslav D Dramićanin, Damjana Drobne
Nano-sized cerium dioxide (CeO2) particles are emerging as an environmental issue due to their extensive use in automobile industries as fuel additives. Limited information is available on the potential toxicity of CeO2 nanoparticles (NPs) on terrestrial invertebrates through dietary exposure. In the present study, the toxic effects of CeO2 NPs on the model soil organism Porcellio scaber were evaluated. Nanotoxicity was assessed by monitoring the lipid peroxidation (LP) level and feeding rate after 14-days exposure to food amended with nano CeO2...
February 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28102440/thyroid-hormones-retinol-and-clinical-parameters-in-relation-to-mercury-and-organohalogen-contaminants-in-great-blue-heron-ardea-herodias-nestlings-from-the-st-lawrence-river-qu%C3%A3-bec-canada
#16
Louise Champoux, Monique Boily, Guy Fitzgerald
The exposure and effects of persistent environmental contaminants were investigated in great blue heron (Ardea herodias) nestlings sampled in 2001, 2002, 2006, and 2007 in freshwater and estuarine heronries along the St. Lawrence River, Québec (Canada). Biomarkers (retinoids, thyroid hormones, and clinical parameters) and contaminants (organochlorine contaminants, polychlorinated biphenyls (PCBs), brominated flame retardants (BFRs), and mercury (Hg)) were analyzed in blood, and Hg was analyzed in feathers (generally 9 nestlings per colony and 4 colonies per year)...
February 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28074227/heavy-metals-in-liver-and-brain-of-waterfowl-from-the-evros-delta-greece
#17
Maria Aloupi, Asimina Karagianni, Savas Kazantzidis, Triantaphyllos Akriotis
The concentrations of six heavy metals (cadmium [Cd], chromium [Cr], copper [Cu], manganese [Mn], lead [Pb], and zinc [Zn]) were determined in liver and brain of nine species of waterfowl from the Evros Delta, one of the most important wetlands in Greece, to assess metal contamination and potential risk to waterfowl. Significant differences among species were found for hepatic Cr, Cu, Pb, and Zn; the highest levels of all metals were found in liver of mute swans. Cd increased significantly with age in both organs of wigeon; some differences were also observed between males and females of the same species...
February 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28064370/changes-in-sport-fish-mercury-concentrations-from-food-web-shifts-suggest-partial-decoupling-from-atmospheric-deposition-in-two-colorado-reservoirs
#18
Brian A Wolff, Brett M Johnson, Jesse M Lepak
Partial decoupling of mercury (Hg) loading and observed Hg concentrations ([Hg]) in biotic and abiotic samples has been documented in aquatic systems. We studied two Colorado reservoirs to test whether shifts in prey for sport fish would lead to changes in [Hg] independent of external atmospheric Hg deposition. We compared sport fish total mercury concentrations ([T-Hg]) and macroinvertebrate (chironomids and crayfish) methylmercury concentrations ([MeHg]) before and after food web shifts occurred in both reservoirs...
February 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28054105/comparative-developmental-toxicity-of-desalination-brine-and-sulfate-dominated-saltwater-in-a-euryhaline-fish
#19
Allison Kupsco, Rafid Sikder, Daniel Schlenk
Desalination is a promising sustainable solution to meet growing water needs of cities across the United States. However, the environmental impacts of the resulting filtrate (brine) discharged to surface water need to be evaluated before large-scale desalination can be successful in the United States. Developing fish are especially sensitive to changes in salinity and varying ionic composition. Limited research is available on the impacts of hypersalinity on chronic vertebrate embryonic development, particularly on sublethal effects...
February 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28050624/toxicity-assessment-of-binary-metal-mixtures-copper-zinc-to-nitrification-in-soilless-culture-with-the-extended-biotic-ligand-model
#20
Aiju Liu, JinXin Li, Menghong Li, Xiao Yin Niu, Jun Wang
Metals are always found in the environment as mixtures rather than as solitary elements. Only a limited number of studies have developed appropriate models that incorporate bioavailability to estimate the toxicity of heavy-metal mixtures. In the present study, we explored the applicability of two extended biotic ligand model (BLM) approaches-BLM-f mix and BLM-toxicity unit (TU)-to predict and interpret mixture toxicity with the assumption that interactions between metal ions obey the BLM theory. Exposure assays of single and mixed metals were performed with inoculums of an ammonia-oxidizing bacterium SD5 isolated from soil...
February 2017: Archives of Environmental Contamination and Toxicology
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