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https://www.readbyqxmd.com/read/28454054/-1-h-nmr-based-metabolomics-investigation-on-the-effects-of-petrochemical-contamination-in-posterior-adductor-muscles-of-caged-mussel-mytilus-galloprovincialis
#1
Tiziana Cappello, Maria Maisano, Angela Mauceri, Salvatore Fasulo
Environmental metabolomics is a high-throughout approach that provides a snapshot of the metabolic status of an organism. In order to elucidate the biological effects of petrochemical contamination on aquatic invertebrates, mussels Mytilus galloprovincialis were caged at the "Augusta-Melilli-Priolo" petrochemical area and Brucoli (Sicily, south Italy), chosen as the reference site. After confirming the elevated concentrations of polycyclic aromatic hydrocarbons (PAHs) and mercury (Hg) in Augusta sediments in our previous work (Maisano et al...
April 25, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28454030/pesticide-impact-study-in-the-peri-urban-horticultural-area-of-gran-la-plata-argentina
#2
Tomás M Mac Loughlin, Leticia Peluso, Damián J G Marino
Vegetable production systems are characterized by intense pesticide use, yet the effects on the surrounding environment are largely unknown and need to be studied. Given this knowledge gap, the objective of this work is to determine the impact of horticulture on a representative watercourse by conducting an integrated study of the occurrence and concentration of pesticides in bottom sediments and their relation to lethal and sublethal effects on benthic fauna. Two sampling campaigns were conducted during seasons of low and high pesticide application in five sites along the Carnaval creek, located in the peri-urban area of La Plata City (Buenos Aires, Argentina)...
April 25, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28454023/toxicity-and-accumulation-of-copper-oxide-cuo-nanoparticles-in-different-life-stages-of-artemia-salina
#3
M R Madhav, S Einstein Mariya David, R S Suresh Kumar, J S Swathy, M Bhuvaneshwari, Amitava Mukherjee, N Chandrasekaran
Metal nanoparticles production rate and its applications have raised concerns about their release and toxicity to the aquatic and terrestrial organisms. The primary size of Copper Oxide nanoparticles (CuO NP's) was found to be 114±36nm using Scanning Electron Microscopy (SEM) and a significant increase in the hydrodynamic diameter of CuO NP was seen within 1h of interaction. The median lethal concentration (LC50) values obtained from the acute toxicity studies on different life stages of Artemia salina was found to be 61...
March 22, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28454022/quantitative-analysis-of-adsorptive-interactions-of-ionic-and-neutral-pharmaceuticals-and-other-chemicals-with-the-surface-of-escherichia-coli-cells-in-aquatic-environment
#4
Chul-Woong Cho, Jeong-Soo Park, Yufeng Zhao, Yeoung-Sang Yun
Since Escherichia coli is ubiquitous in nature and has been applied to biological, chemical, and environmental processes, molecular-level understanding of adsorptive interactions between chemicals and the bacterial surface is of great importance. To characterise the adsorption properties of the surface of E. coli cells in aquatic environment, the binding affinities (log Kd) of calibration compounds were experimentally measured, and then based on the values and numerically well-defined molecular interaction forces, i...
April 25, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28454020/toxicity-of-tio2-in-nanoparticle-or-bulk-form-to-freshwater-and-marine-microalgae-under-visible-light-and-uv-a-radiation
#5
M Sendra, I Moreno-Garrido, M P Yeste, J M Gatica, J Blasco
Use of titanium dioxide nanoparticles (TiO2 NPs) has become a part of our daily life and the high environmental concentrations predicted to accumulate in aquatic ecosystems are cause for concern. Although TiO2 has only limited reactivity, at the nanoscale level its physico-chemical properties and toxicity are different compared with bulk material. Phytoplankton is a key trophic level in fresh and marine ecosystems, and the toxicity provoked by these nanoparticles can affect the structure and functioning of ecosystems...
April 25, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28454019/adsorption-of-carbon-dots-onto-al2o3-in-aqueous-experimental-and-theoretical-studies
#6
Xia Liu, Jiaxing Li, Xiaohua Wu, Zhi Zeng, Xianlong Wang, Tasawar Hayat, Xiaodong Zhang
Increasing interests in carbon dots (CDs) research resulted in the increased production of CDs and the risk to be released into the environment, including surface water and groundwater. To assess the environmental behavior of CDs, the stability of CDs in aqueous solutions were first examined by different environmental conditions, followed by the systematic investigation of the adsorption behaviors of CDs onto Al2O3 surface. Electrostatic interactions were considered as the dominant forces in CDs adsorption onto Al2O3 process, which were further confirmed by controlling experiments as compared with other minerals or oxides, such as montmorillonite, kaolinite and SiO2...
April 25, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28449322/a-bacterium-with-close-genetic-identity-to-pseudomonas-mandelii-associated-with-spring-fish-kills-in-wild-bluegill-lepomis-macrochirus-rafinesque-and-pumpkinseed-sunfish-lepomis-gibbosus-linnaeus
#7
J Lovy, D Dicarlo-Emery, J M Hutcheson
Pseudomonas fluorescens are known bacterial pathogens in fish. The P. fluorescens group contains at least nine different bacterial species, although species from fish have rarely been differentiated. Two isolated fish kills affecting wild bluegills, Lepomis macrochirus Rafinesque, and pumpkinseed sunfish, Lepomis gibbosus (Linnaeus), occurred in the spring of 2015 during cool water temperatures (12.5°C-15.5°C). Disease signs included severe bacteraemia with rare gross external signs. Pure bacterial cultures isolated from kidneys of all affected fish were identified as P...
April 27, 2017: Journal of Fish Diseases
https://www.readbyqxmd.com/read/28449274/a-dna-barcode-library-for-germany-s-mayflies-stoneflies-and-caddisflies-ephemeroptera-plecoptera-trichoptera
#8
Jérôme Morinière, Lars Hendrich, Michael Balke, Arne J Beermann, Tobias König, Monika Hess, Stefan Koch, Reinhard Müller, Florian Leese, Paul D N Hebert, Axel Hausmann, Christoph F Schubart, Gerhard Haszprunar
Mayflies, stoneflies and caddisflies (Ephemeroptera, Plecoptera and Trichoptera) are prominent representatives of aquatic macroinvertebrates, commonly used as indicator organisms for water quality and ecosystem assessments. However, unambiguous morphological identification of EPT species, especially their immature life stages, is a challenging, yet fundamental task. However, a comprehensive DNA barcode library based upon taxonomically well-curated specimens can overcome the problematic identification. Once available, this library will support the implementation of fast, cost-efficient, and reliable DNA-based identifications and assessments of ecological status...
April 27, 2017: Molecular Ecology Resources
https://www.readbyqxmd.com/read/28449215/rapid-degradation-of-longer-dna-fragments-enables-the-improved-estimation-of-distribution-and-biomass-using-environmental-dna
#9
Toshiaki Jo, Hiroaki Murakami, Reiji Masuda, Masayuki Sakata, Satoshi Yamamoto, Toshifumi Minamoto
The advent of environmental DNA (eDNA) analysis methods has enabled rapid and wide-range ecological monitoring in aquatic ecosystems, but there is a dearth of information on eDNA degradation. The results of previous studies suggest that the decay rate of eDNA varies depending on the length of DNA fragments. To examine this hypothesis, we compared temporal change in copy number of long eDNA fragments (719 bp) with that of short eDNA fragments (127 bp). First, we isolated rearing water from a target fish species, Japanese Jack Mackerel (Trachurus japonicus), and then quantified the copy number of the long and short eDNA fragments in 1 L water samples after isolating the water from the fish...
April 27, 2017: Molecular Ecology Resources
https://www.readbyqxmd.com/read/28448918/erosion-of-the-alberta-badlands-produces-highly-variable-and-elevated-heavy-metal-concentrations-in-the-red-deer-river-alberta
#10
Jason G Kerr, Colin A Cooke
Erosion is important in the transport of heavy metals from terrestrial to fluvial environments. In this study, we investigated riverine heavy metal (Cd, Cu, Hg and Pb) dynamics in the Red Deer River (RDR) watershed at sites upstream (n=2) and downstream (n=7) of the Alberta badlands, an area of naturally high erosion. At sites draining the badlands, total water column Cd, Cu, Hg and Pb concentrations frequently exceeded guidelines for the protection of freshwater biota. Furthermore, peak concentrations of total Cd (9...
April 24, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28448906/variation-in-the-toxicity-of-sediment-associated-substituted-phenylamine-antioxidants-to-an-epibenthic-hyalella-azteca-and-endobenthic-tubifex-tubifex-invertebrate
#11
R S Prosser, A J Bartlett, D Milani, E A M Holman, H Ikert, D Schissler, J Toito, J L Parrott, P L Gillis, V K Balakrishnan
Substituted phenylamine antioxidants (SPAs) are produced in relatively high volumes and used in a range of applications (e.g., rubber, polyurethane); however, little is known about their toxicity to aquatic biota. Therefore, current study examined the effects of chronic exposure (28 d) to four sediment-associated SPAs on epibenthic (Hyalella azteca) and endobenthic (Tubifex tubifex) organisms. In addition, acute (96-h), water-only exposures were conducted with H. azteca. Mortality, growth and biomass production were assessed in juvenile H...
April 17, 2017: Chemosphere
https://www.readbyqxmd.com/read/28448876/study-on-electronic-properties-thermodynamic-and-kinetic-parameters-of-the-selected-platinum-ii-derivatives-interacting-with-guanine
#12
Filip Šebesta, Jaroslav V Burda
Interaction of hydrated forms of several potential anticancer agents (PtCl2(diaminocyclohexane), trans-[PtCl2(NH3)(thiazole)], cis-[PtCl2(NH3)(piperidine)], and cis-PtCl2(NH3)(cyclohexylamine) complexes) with guanine are explored and compared with an analogous interaction of cisplatin. Basic electronic properties, binding and stabilization energies are determined and energy profiles for the aquation reaction are estimated at the B3LYP/6-311++G(2df,2pd) level of theory. It is found that the substitution reaction is an exothermic and exergonic process with ΔG slightly less negative than -20kcal/mol...
April 12, 2017: Journal of Inorganic Biochemistry
https://www.readbyqxmd.com/read/28448845/use-of-aqueous-two-phase-peg-salt-systems-for-the-removal-of-anionic-surfactant-from-effluents
#13
Gabriella Frade Murari, Jussara Alves Penido, Heriveltom Morais da Silva, Bruno Eduardo Lôbo Baêta, Sérgio Francisco de Aquino, Leandro Rodrigues de Lemos, Guilherme Dias Rodrigues, Aparecida Barbosa Mageste
Linear alkylbenzene sulfonates (LAS) are synthetic anionic surfactants that are extensively used in many industries. As a result, large volumes of effluents containing high levels of these compounds are discharged into water bodies, causing risks to aquatic flora and fauna. Then, there is a need for environmentally safe and economically viable technologies for the removal of LAS from aqueous matrices. The present work evaluates the use of aqueous two-phase systems (ATPS) composed of PEG and sulfate salts for this purpose, considering the effects of tie line length (TLL), molar mass of polymer, and type of cation-forming salt on the partitioning behavior of LAS...
April 24, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28448768/toxicity-identification-and-evaluation-tie-of-a-petroleum-refinery-wastewater
#14
Sarah D A Daflon, Igor L Guerra, Márcia V Reynier, Ana C Cerqueira, Clarice R Botta, Juacyara C Campos
Petroleum refineries generate large amounts of wastewaters, which can have acute/chronic toxicity toward aquatic organisms. Previous studies have shown that many contaminants can be responsible for this toxicity, among them ammonia, sulfide, cyanide, phenols and hydrocarbons. In the study reported herein, the cause of the chronic toxicity of a biotreated petroleum refinery wastewater was investigated by applying the TIE methodology using the microcrustacean Ceriodaphnia dubia. Five samples were analyzed, and the results suggest that copper is the primary toxicant, showing a strong correlation with wastewater toxicity in Phase III...
April 27, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28448719/use-of-native-aquatic-macrophytes-in-the-reduction-of-organic-matter-from-dairy-effluents
#15
Rita de Cássia Souza de Queiroz Lopes, Rodrigo Santos Andrade, Isadora Rosário Dantas, Vinícius de Souza Ribeiro, Luciano Brito Rodrigues Neto, José Adolfo de Almeida Neto
Considering the diversity and the unexplored potential of regional aquatic flora, this study aimed to identify and analyze the potential of native aquatic macrophytes to reduce the organic matter of dairy wastewater using experimental constructed wetlands. The dairy wastewater had an initial average COD of 7,414.63 mg/L and then was diluted to 3,133.16 mg/L (D1) and to 2,506.53 mg/L (D2). Total solids, COD, temperature, and pH analyses were performed, and the BOD was estimated from the COD values. The best performance in the reduction of the organic matter was observed for Polygonum sp...
April 27, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/28448459/viability-of-legionella-pneumophila-in-water-samples-a-comparison-of-propidium-monoazide-pma-treatment-on-membrane-filters-and-in-liquid
#16
Sara Bonetta, Cristina Pignata, Silvia Bonetta, Lorenza Meucci, Donatella Giacosa, Elena Marino, Giorgio Gilli, Elisabetta Carraro
Legionella pneumophila is a ubiquitous microorganism widely distributed in aquatic environments and can cause Legionellosis in humans. A promising approach to detect viable cells in water samples involves the use of quantitative polymerase chain reaction (qPCR) in combination with photoactivatable DNA intercalator propidium monoazide (PMA). However, the PMA efficiency could be different depending on the experimental conditions used. The aim of this study was to compare two PMA exposure protocols: (A) directly on the membrane filter or (B) in liquid after filter washing...
April 27, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28448165/phytoremediation-of-organochlorine-and-pyrethroids-pesticides-by-aquatic-macrophytes-and-algae-in-freshwater-system
#17
Ghazala Riaz, Amtul Bari Tabinda, Shakir Iqbal, Abdullah Yasar, Mateen Abbas, Abdul Muqeet Khan, Yusra Mahfooz, Mujtaba Baqar
Pesticides application in agriculture and their runoff in river water is a major environmental issue. Present study evaluated the phytoremediation potential of Eichornia crassipes, Pistia strateotes and algae (chaetomorphasutoria, sirogoniumsticticum and zygnema sp.) for organochlorine and pyrethroids pesticides. Water and plant sample were extracted by liquid phase and solid phase extraction respectively and analyzed by high performance liquid chromatography (HPLC). Eleven treatments (T1-T11) with and without plant were used for phytoremediation of organochlorine and pyrethroids pesticides...
April 27, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/28447782/does-waterborne-exposure-explain-effects-caused-by-neonicotinoid-contaminated-plant-material-in-aquatic-systems
#18
Dominic Englert, Jochen Peter Zubrod, Moritz Link, Saskia Mertins, Ralf Schulz, Mirco Bundschuh
Neonicotinoids are increasingly applied on trees as protection measure against insect pests. Consequently, neonicotinoids are inevitably transferred into aquatic environments either via spray drift, surface runoff or - due to neonicotinoids' systemic nature - via senescent leaves. There particularly leaf-shredding invertebrates may be exposed to neonicotinoids through both the water phase and the consumption of contaminated leaves. In 7-d-bioassays (n=30) we examined ecotoxicological differences between these two exposure scenarios for an amphipod and an insect nymph with their feeding rate as the response variable...
April 27, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28447615/millions-of-boreal-shield-lakes-can-be-used-to-probe-archaean-ocean-biogeochemistry
#19
S L Schiff, J M Tsuji, L Wu, J J Venkiteswaran, L A Molot, R J Elgood, M J Paterson, J D Neufeld
Life originated in Archaean oceans, almost 4 billion years ago, in the absence of oxygen and the presence of high dissolved iron concentrations. Early Earth oxidation is marked globally by extensive banded iron formations but the contributing processes and timing remain controversial. Very few aquatic habitats have been discovered that match key physico-chemical parameters of the early Archaean Ocean. All previous whole ecosystem Archaean analogue studies have been confined to rare, low sulfur, and permanently stratified lakes...
April 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28447253/an-insight-into-mercury-reduction-process-by-humic-substances-in-aqueous-medium-under-dark-condition
#20
Krushna Vudamala, Parthasarathi Chakraborty, Budati Bala Venkata Sailaja
Mercury (Hg) reduction by humic substances (HS) in the aquatic medium under the dark condition is a poorly understood but important process in Hg biogeochemical cycling. In this study, an effort was made to provide a better understanding of Hg(II) reduction by well-characterized humic substances under dark condition. Reduction of Hg(II) by dissolved HS in aquatic systems increases with increasing Hg loading. However, Hg(II) reduction gradually decreases with the increasing total S content and oxygen containing functional groups in the dissolved HS under dark condition...
April 27, 2017: Environmental Science and Pollution Research International
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