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https://www.readbyqxmd.com/read/29346024/occurrence-of-polycyclic-aromatic-hydrocarbons-in-surface-water-and-hospital-wastewater
#1
Ayrton F Martins, Daiane S da Silva, Alma C C Mejía, José E B Bravo
The main objective of this study was to determine the occurrence of polycyclic aromatic hydrocarbons (PAHs) in surface water samples collected from different points along the stream that flows through the Campus of the Federal University of Santa Maria, RS-Brazil. Before reaching the campus, the water in the stream is already contaminated by wastewater discharged from the surrounding, and once inside the Campus, additional wastewater from a Gas Station situated close to the University hospital. A bench scale photodegradation experiment was conducted of the occurring traces of anthracene, phenanthrene and naphthalene, with the aid of a stirred tank reactor and polymer-supported TiO2 as a catalyst...
January 18, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29345465/microplastic-abundance-and-composition-in-western-lake-superior-as-determined-via-microscopy-pyr-gc-ms-and-ftir
#2
Erik Hendrickson, Elizabeth C Minor, Kathryn Schreiner
While plastic pollution in marine and freshwater systems is an active area of research, there is not yet an in-depth understanding of the distributions, chemical compositions, and fates of plastics in aquatic environments. In this study, the magnitude, distribution, and common polymers of microplastic pollution in surface waters in western Lake Superior are determined. Analytical methodology, including estimates of ambient contamination during sample collection and processing, are described and employed. Microscopy, Pyrolysis-Gas Chromatography/Mass spectrometry (Pyr-GC/MS), and Fourier Transform Infrared spectroscopy (FTIR) were used to quantify and identify microplastic particles...
January 18, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29343796/integrated-climate-chemical-indicators-of-diffuse-pollution-from-land-to-water
#3
Per-Erik Mellander, Phil Jordan, Marianne Bechmann, Ophélie Fovet, Mairead M Shore, Noeleen T McDonald, Chantal Gascuel-Odoux
Management of agricultural diffuse pollution to water remains a challenge and is influenced by the complex interactions of rainfall-runoff pathways, soil and nutrient management, agricultural landscape heterogeneity and biogeochemical cycling in receiving water bodies. Amplified cycles of weather can also influence nutrient loss to water although they are less considered in policy reviews. Here, we present the development of climate-chemical indicators of diffuse pollution in highly monitored catchments in Western Europe...
January 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29342945/hyperspectral-features-of-oil-polluted-sea-ice-and-the-response-to-the-contamination-area-fraction
#4
Bingxin Liu, Ying Li, Chengyu Liu, Feng Xie, Jan-Peter Muller
Researchers have studied oil spills in open waters using remote sensors, but few have focused on extracting reflectance features of oil pollution on sea ice. An experiment was conducted on natural sea ice in Bohai Bay, China, to obtain the spectral reflectance of oil-contaminated sea ice. The spectral absorption index (SAI), spectral peak height (SPH), and wavelet detail coefficient (DWT d5) were calculated using stepwise multiple linear regression. The reflectances of some false targets were measured and analysed...
January 15, 2018: Sensors
https://www.readbyqxmd.com/read/29341852/emissions-of-organic-compounds-from-produced-water-ponds-ii-evaluation-of-flux-chamber-measurements-with-inverse-modeling-techniques
#5
Huy N Q Tran, Seth N Lyman, Marc L Mansfield, Trevor O'Neil, Richard L Bowers, Ann P Smith, Cara Keslar
In this study, we apply two different dispersion models to evaluate flux chamber measurements of emissions of 58 organic compounds, including C2-C11 hydrocarbons and methanol, ethanol, and isopropanol from oil and gas produced water ponds in the Uintah Basin. Field measurement campaigns using the flux chamber technique were performed at a limited number of produced water ponds in the Basin throughout 2013-2016. Inverse modeling results showed significantly higher emissions than were measured by the flux chamber...
January 17, 2018: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/29341366/impact-of-multiple-stressors-on-juvenile-fish-in-estuaries-of-the-northeast-pacific
#6
Jason D Toft, Stuart H Munsch, Jeffery R Cordell, Kiira Siitari, Van C Hare, Brett Holycross, Lisa A DeBruyckere, Correigh M Greene, Brent B Hughes
A key step in identifying global change impacts on species and ecosystems is to quantify effects of multiple stressors. To date, the science of global change has been dominated by regional field studies, experimental manipulation, meta-analyses, conceptual models, reviews, and studies focusing on a single stressor or species over broad spatial and temporal scales. Here, we provide one of the first studies for coastal systems examining multiple stressor effects across broad scales, focused on the nursery function of 20 estuaries spanning 1600 km of coastline, 25 years of monitoring, and seven fish and invertebrate species along the northeast Pacific coast...
January 17, 2018: Global Change Biology
https://www.readbyqxmd.com/read/29340860/trace-element-phytoextraction-from-contaminated-soil-a-case-study-under-mediterranean-climate
#7
Werther Guidi Nissim, Emily Palm, Stefano Mancuso, Elisa Azzarello
The current field study aims to assess the suitability of four different plant species (i.e. poplar, willow, hemp and alfalfa) to be used for trace element (TE) (i.e. Cd, Cu, Ni, Pb and Zn) phytoextraction under hot-arid Mediterranean climate conditions. Plants were grown for two consecutive years on a moderate TE contaminated soil, supplied with water and mineral nutrients. The growth and physiological parameters were assessed throughout the trial to compare the response of plants to the environmental pollution, and TE uptake rates were measured for aboveground plant tissues...
January 16, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29340721/geochemical-assessment-of-fluoride-pollution-in-groundwater-of-tribal-region-in-india
#8
Anshumali, Manish Kumar, Nikki Chanda, Abhay Kumar, Bijendra Kumar, Madavi Venkatesh
This study assessed the fluoride (F-) pollution in groundwater samples (n = 170) of tribal regions around Bailadila Iron Ore Mines [BIOM] Complex of Dantewada District, India. Weathering of carbonate and silicate clays were important geogenic sources of dissolved ions. A Piper diagram showed a Ca-HCO3 water type, with positive chloro-alkaline indices illustrating the occurrence of direct base-exchange reactions. The F- concentrations varied from 0.08 to 1.95 mg L-1 with a mean value of 0.9 ± 0.3 mg L-1...
January 16, 2018: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/29339620/the-membrane-fouling-mechanisms-of-the-pac-bpac-uf-combined-process-used-to-treat-the-secondary-effluent-from-municipal-wastewater-treatment-plant
#9
Lihua Sun, Ning He, Xi Duan, Bingbing Yang, Cuimin Feng, Yajun Zhang
The combined processes of powdered activated carbon/biological powdered activated carbon- ultrafiltration (PAC/BPAC-UF) were used to treat secondary effluent. In this study, the effect of PAC and BPAC on membrane flux, membrane resistance and the removal of different molecular weight organic compounds were investigated. In addition, the structure characteristics of the microorganisms of the BPAC were analyzed. The results showed that the optimum dosage of PAC and BPAC was 10 mg/L and 40 mg/L respectively. The reversible membrane fouling resistance of BPAC-UF was higher than that of PAC-UF, and the two processes had the least irreversible resistance at the best dosage...
January 2018: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/29339279/green-synthesis-of-antimicrobial-and-antitumor-n-n-n-trimethyl-chitosan-chloride-poly-acrylic-acid-silver-nanocomposites
#10
Mahmoud H Abu Elella, Riham R Mohamed, Marwa M Abdel-Aziz, Magdy W Sabaa
The present study is imported to solve two critical problems we face in our daily life which are microbial pollution and colon cancer. One pot green synthesis of a water soluble polyelectrolyte complex (PEC) between cationic polysaccharide as N,N,N-trimethyl chitosan chloride (TMC) and anionic polymer as poly (acrylic acid) (PAA) in presence of silver nanoparticles to yield (TMC/PAA/Ag) nanocomposites with different Ag weight ratios. Structure of TMC, PAA and TMC/PAA (PEC) were proved via different analysis tools...
January 12, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29336672/internal-cs-inhibits-root-elongation-in-rice
#11
Sonia Mohamed, Hervé Sentenac, Emmanuel Guiderdoni, Anne-Aliénor Véry, Manuel Nieves-Cordones
The root system anchors the plant to the soil and contributes to plant autotrophy by taking up nutrients and water. In relation with this nutritional function, root development is largely impacted by availability of nutrients and water. Due to human activity, plants, in particular crops, can also be exposed to pollutants which can be absorbed and incorporated into the food chain. Cesium in soils is present at non-toxic concentrations for the plant (micromolar or less), even in soils highly polluted with radioactive cesium due to nuclear accidents...
January 16, 2018: Plant Signaling & Behavior
https://www.readbyqxmd.com/read/29335874/mass-balance-of-arsenic-fluxes-in-rivers-impacted-by-gold-mining-activities-in-paracatu-minas-gerais-state-brazil
#12
Edison Bidone, Ricardo Cesar, Maria Carla Santos, Ricardo Sierpe, Emmanuel Vieira Silva-Filho, Vinicius Kutter, Lílian I Dias da Silva, Zuleica Castilhos
Arsenic (As) is a dangerous and carcinogenic element and drinking water is its main pathway of human exposure. Gold mines are widely recognized as important sources of As pollution. This work proposes the assessment of As distribution along watersheds surrounding "Morro do Ouro" gold mine (Paracatu, southeastern Brazil). A balance approach between filtered As fluxes (As < 0.45 μm) and suspended particulate material (AsSPM) in different river segments was applied. Ultrafiltration procedure was used to categorize As into the following classes: particulate > 0...
January 16, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29335873/agricultural-non-point-source-pollution-management-in-a-reservoir-watershed-based-on-ecological-network-analysis-of-soil-nitrogen-cycling
#13
Wen Xu, Yanpeng Cai, Qiangqiang Rong, Zhifeng Yang, Chunhui Li, Xuan Wang
The Miyun Reservoir plays a pivotal role in providing drinking water for the city of Beijing. In this research, ecological network analysis and scenario analysis were integrated to explore soil nitrogen cycling of chestnut and Chinese pine forests in the upper basin of the Miyun Reservoir, as well as to seek favorable fertilization modes to reduce agricultural non-point source pollution. Ecological network analysis results showed that (1) the turnover time was 0.04 to 0.37 year in the NH4+ compartment and were 15...
January 15, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29335221/highly-efficient-solar-driven-photocatalytic-degradation-on-environmental-pollutants-over-a-novel-c-fibers-mose2-nanoplates-core-shell-composite
#14
Meng Wang, Zhijian Peng, Jingwen Qian, Hong Li, Zengying Zhao, Xiuli Fu
As an important member of two-dimensional transition metal dichalcogenides, MoSe2 has a wide range of photoelectrochemical properties. However, MoSe2 alone can not directly be used as photocatalyst for its poor performance owing to the strong recombination of photogenerated electron-hole pairs. Here, we propose a novel C fibers@MoSe2 nanoplates core-shell composite, which was prepared by a facile, one-step thermal evaporation method. The composite has a remarkable feature of numerous MoSe2 thin nanoplates grown in-situ, densely and even vertically on the surface of the C fibers...
January 10, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29335169/seasonal-variations-in-fine-particle-composition-from-beijing-prompt-oxidative-stress-response-in-mouse-lung-and-liver
#15
Michal Pardo, Fanfan Xu, Xinghua Qiu, Tong Zhu, Yinon Rudich
Exposure to air pollution can induce oxidative stress, inflammation and adverse health effects. To understand how seasonal and chemical variations drive health impacts, we investigated indications for oxidative stress and inflammation in mice exposed to water and organic extracts from urban fine particles/PM2.5 (particles with aerodynamic diameter ≤ 2.5 μm) collected in Beijing, China. Higher levels of pollution components were detected in heating season (HS, winter and part of spring) PM2.5 than in the non-heating season (NHS, summer and part of spring and autumn) PM2...
January 12, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29334673/copper-bioaccumulation-and-biokinetic-modeling-in-marine-herbivorous-fish-siganus-oramin
#16
Yanyan Zhou, Fangsan Wei, Wei Zhang, Zhiqiang Guo, Li Zhang
Marine herbivorous fish directly consume macroalgae, which commonly accumulate high levels of trace metals in polluted areas. We proposed that herbivorous fish could be better candidates for biomonitoring marine metal pollution than carnivorous fish. To date, the trophic transfer of Cu from macroalgae to marine herbivorous fish is unclear. In this study, the kinetics of Cu bioaccumulation in a widespread marine herbivorous fish, Siganus oramin, were investigated, and biokinetic modeling was applied to estimate the Cu levels in the fish sampled from different sites and seasons...
January 10, 2018: Aquatic Toxicology
https://www.readbyqxmd.com/read/29334177/polypropylene-nonwoven-fabric-poly-ionic-liquid-s-for-switchable-oil-water-separation-dye-absorption-and-antibacterial-applications
#17
Yongyuan Ren, Jiangna Guo, Dan Xu, Jing Qin, Qian Lu, Feng Yan
Pollutants in wastewater include oils, dyes, and bacteria, making wastewater cleanup difficult. Here, we propose the preparation of multifunctional wastewater treatment media, poly(ionic liquid) grafted polypropylene (PP) nonwoven fabrics (PP@PIL), prepared via a simple and scalable surface grafting process. The fabricated PP@PIL fabrics exhibited superior switchable oil/water separation (η > 99%) and dye absorption performance (q = 410 mg/g), as well as high antibacterial properties. The oil/water separation could be easily switched via anion-exchanging of PIL segments...
January 15, 2018: ChemSusChem
https://www.readbyqxmd.com/read/29333682/selective-extraction-of-bisphenol-a-from-water-by-one-monomer-molecularly-imprinted-magnetic-nanoparticles
#18
Zhenkun Lin, Yanfang Zhang, Yu Su, Jinxia Qi, Yinhang Jia, Changjiang Huang, Qiaoxiang Dong
One-monomer molecularly imprinted magnetic nanoparticles were prepared as adsorbents for selective extraction of bisphenol A from water in this study. A single bi-functional monomer was adopted for preparation of the molecularly imprinted polymer, avoiding the tedious trial-and-error optimizations as traditional strategy. Moreover, bisphenol F was used as the dummy template for bisphenol A to avoid the interference from residual template molecules. These nanoparticles not only showed large adsorption capacity and good selectivity to the bisphenol A, but also outstanding magnetic response performance...
January 15, 2018: Journal of Separation Science
https://www.readbyqxmd.com/read/29333571/diurnal-variations-in-personal-care-products-in-seawater-and-mussels-at-three-mediterranean-coastal-sites
#19
Marina Picot-Groz, Hélène Fenet, Maria Jesus Martinez Bueno, David Rosain, Elena Gomez
The presence of personal care products (PCPs) in the marine environment is of major concern. PCPs, UV filters, and musks can enter the marine environment indirectly through wastewater or directly via recreational activities. We conducted this study to document patterns in the occurrence of seven PCPs at three coastal sites impacted by recreational activities during 1 day. The study focused on diurnal variations in these seven PCPs in seawater and indigenous mussels. In seawater, UV filters showed diurnal variations that mirrored variations in recreational activities at the sites...
January 15, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29333569/an-integrated-fuzzy-based-advanced-eutrophication-simulation-model-to-develop-the-best-management-scenarios-for-a-river-basin
#20
Rallapalli Srinivas, Ajit Pratap Singh
Assessment of water quality status of a river with respect to its discharge has become prerequisite to sustainable river basin management. The present paper develops an integrated model for simulating and evaluating strategies for water quality management in a river basin management by controlling point source pollutant loadings and operations of multi-purpose projects. Water Quality Analysis and Simulation Program (WASP version 8.0) has been used for modeling the transport of pollutant loadings and their impact on water quality in the river...
January 14, 2018: Environmental Science and Pollution Research International
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