journal
MENU ▼
Read by QxMD icon Read
search

Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering

journal
https://www.readbyqxmd.com/read/27925846/characteristics-sources-and-cytotoxicity-of-atmospheric-polycyclic-aromatic-hydrocarbons-in-urban-roadside-areas-of-hangzhou-china
#1
Hongzhen Bai, Hongjian Zhang
The primary objective of this study is to understand the profiles, sources and cytotoxic effects of atmospheric polycyclic aromatic hydrocarbons (PAHs), which are closely related to urban air contamination and public health, in urban roadside environments. On-road sampling campaigns were conducted from 2014 to 2015 at three urban road sites in Hangzhou, China. Sixteen gaseous and particulate matter (PM) 2.5-bound PAHs were identified and quantified using gas chromatography-mass spectrometry (GC-MS). The total PAH concentrations at the three sites ranged from 750 to1142 ng/m(3) and 1050 to 1483 ng/m(3) in summer and winter, respectively...
December 7, 2016: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/27925576/comparison-of-oxygen-transfer-parameters-and-oxygen-demands-in-bioreactors-operated-at-low-and-high-dissolved-oxygen-levels
#2
Richard O Mines, Matthew C Callier, Benjamin J Drabek, André J Butler
The proper design of aeration systems for bioreactors is critical since it can represent up to 50% of the operational and capital cost at water reclamation facilities. Transferring the actual amount of oxygen needed to meet the oxygen demand of the wastewater requires α- and β-factors, which are used for calculating the actual oxygen transfer rate (AOTR) under process conditions based on the standard oxygen transfer rate (SOTR). The SOTR is measured in tap water at 20°C, 1 atmospheric pressure, and 0 mg L(-1) of dissolved oxygen (DO)...
December 7, 2016: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/27925508/%C3%AE-cyclodextrin-carbon-nanotube-enhanced-sensor-for-ciprofloxacin-detection
#3
Jorge M P J Garrido, Manuel Melle-Franco, Karol Strutyński, Fernanda Borges, Christopher M A Brett, E Manuela P J Garrido
A simple and expedite electrochemical methodology was developed for the determination of ciprofloxacin, based on a glassy carbon (GC) electrode modified by a combination of multi-walled carbon nanotubes (MWCNT) with β-cyclodextrin (β-CD) incorporated in a polyaniline film. The combined use of β-CD and MWCNT in the electrochemical sensor leads to a significant signal improvement. The β-CD/MWCNT modified GC electrode exhibited efficient electrocatalytic behavior in the oxidation of ciprofloxacin with relatively high sensitivity, stability and lifetime...
December 7, 2016: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/27925506/aliphatic-and-polycyclic-aromatic-hydrocarbons-pahs-in-soils-of-the-northwest-qinling-mountains-patterns-potential-risk-and-an-appraisal-of-the-pah-ratios-to-infer-their-source
#4
Yanhong Liu, Yingqin Wu, Yanqing Xia, Tianzhu Lei, Chuntao Tian, Xiaohuan Hou
Surface soils from the tourist areas of the northwest Qinling Mountains were analyzed to determine the concentrations, probable sources and potential risks of hydrocarbons. Concentrations of aliphatic and aromatic hydrocarbons ranged from 4.18 to 3240 ng g(-1) and 0.0462 to 101 ng g(-1) dry weight, respectively. The extent of soil contamination by hydrocarbons was generally typified by unpolluted to slightly polluted levels. The incremental lifetime cancer risks (ILCRs) for exposure to soil-borne PAHs indicated complete safety for tourists...
December 7, 2016: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/27925498/behavior-of-tetracycline-and-sulfamethoxazole-and-their-corresponding-resistance-genes-in-three-dimensional-biofilm-electrode-reactors-with-low-current
#5
Shuai Zhang, Hai L Song, Xiao L Yang, Xi Z Long, Xi Liu, Tong Q Chen
Antibiotics and antibiotic resistance genes (ARGs) have become major health concerns. In this study, three-dimensional biofilm-electrode reactors (3D-BERs) under low current were designed to assess their performance in removing tetracycline (TC) and sulfamethoxazole (SMX) from synthetic wastewater. In addition, the fates of the corresponding ARGs in microbial communities were investigated. The mass removal ratios of TC and SMX by the 3D-BERs were 82.6-97.3% and 72.2-93.2%, respectively. There were obvious increases in the relative abundances of all target genes after ∼2 months...
December 7, 2016: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/27911670/quantitative-assessment-of-metal-elements-using-moss-species-as-biomonitors-in-downwind-area-of-lead-zinc-mine
#6
Biljana Balabanova, Trajče Stafilov, Robert Šajn, Katerina Bačeva Andonovska
Distributions of a total of 21 elements were monitored in significantly lead-zinc polluted area using moss species (Hypnum cupressiforme and Camptothecium lutescens) used interchangeably, covering a denser sampling network. Interspecies comparison was conducted using Box-Cox transformed values, due to their skewed distribution. The median concentrations of trace elements in the both mosses examined decreased in the following order: Fe>Mn>Zn>Pb>Cu>Ni∼Cr∼As>Co>Cd>Hg. For almost all analyzed elements, H...
December 2, 2016: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/27901646/the-time-dependent-health-and-biochemical-effects-in-rats-exposed-to-stainless-steel-welding-dust-and-its-soluble-form
#7
Tadeusz Halatek, Magdalena Stanislawska, Irena Kaminska, Malgorzata Cieslak, Radoslaw Swiercz, Wojciech Wasowicz
Welding processes that generate fumes containing toxic metals, such as hexavalent chromium (Cr(VI)), manganese (Mn), and nickel (Ni), have been implicated in lung injury, inflammation, and lung tumor promotion in animal models. The principal objective of this study was to determine the dynamics of toxic effects of inhalation exposure to morphologically rated welding dust from stainless steel welding and its soluble form in TSE System with a dynamic airflow. We assessed the pulmonary toxicity of welding dust in Wistar rats exposed to 60...
November 30, 2016: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/27901640/a-traceable-reference-for-direct-comparative-assessment-of-total-naphthenic-acid-concentrations-in-commercial-and-acid-extractable-organic-mixtures-derived-from-oil-sands-process-water
#8
Pamela Brunswick, L Mark Hewitt, Richard A Frank, Marcus Kim, Graham van Aggelen, Dayue Shang
The advantage of using naphthenic acid (NA) mixtures for the determination of total NA lies in their chemical characteristics and identification of retention times distinct from isobaric interferences. However, the differing homolog profiles and unknown chemical structures of NA mixtures do not allow them to be considered a traceable reference material. The current study provides a new tool for the comparative assessment of different NA mixtures by direct reference to a single, well-defined and traceable compound, decanoic-d19 acid...
November 30, 2016: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/27901632/methane-oxidation-in-a-landfill-cover-soil-reactor-changing-of-kinetic-parameters-and-microorganism-community-structure
#9
Zhi L Xing, Tian T Zhao, Yan H Gao, Xu Yang, Shuai Liu, Xu Y Peng
Changing of CH4 oxidation potential and biological characteristics with CH4 concentration was studied in a landfill cover soil reactor (LCSR). The maximum rate of CH4 oxidation reached 32.40 mol d(-1) m(-2) by providing sufficient O2 in the LCSR. The kinetic parameters of methane oxidation in landfill cover soil were obtained by fitting substrate diffusion and consumption model based on the concentration profile of CH4 and O2. The values of [Formula: see text] (0.93-2.29%) and [Formula: see text] (140-524 nmol kgsoil-DW(-1)·s(-1)) increased with CH4 concentration (9...
November 30, 2016: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/27901630/emerging-pollutant-treatments-in-wastewater-cases-of-antibiotics-and-hormones
#10
Erika Méndez, Miguel A González-Fuentes, Georgette Rebollar-Perez, Alia Méndez-Albores, Eduardo Torres
Because of the intensive use of pharmaceutical substances in human life, studies on the detection of these chemical compounds and their metabolites as pollutants in water bodies are continuously reported. Some pharmaceutical agents are associated with adverse effects to aquatic life, even at very low concentrations (ng L(-1) to μg L(-1)). For instance, the presence of antibiotics and hormones has been associated with increasing proliferation of antibiotic resistant pathogens and feminization and masculinization of some aquatic organisms...
November 30, 2016: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/27901621/perfluorooctanoic-acid-induces-mitochondrial-dysfunction-in-mc3t3-e1-osteoblast-cells
#11
Eun Mi Choi, Kwang Sik Suh, Sang Youl Rhee, Seungjoon Oh, Jeong-Taek Woo, Sung Woon Kim, Young Seol Kim, Youngmi Kim Pak, Suk Chon
Perfluorooctanoic acid (PFOA), a stable organic perfluorinated compound, is an emerging persistent organic pollutant, found widely in human and wildlife populations. Recent evidence suggests that exposure to environmental toxicants can be associated with higher risks of osteoporosis and fractures. We studied the cellular toxicology of PFOA in MC3T3-E1osteoblast cells. To examine the effect of PFOA, we measured cell viability, reactive oxygen species (ROS), mitochondrial superoxide, and mitochondrial parameters including adenosine triphosphate (ATP) level, mitochondrial membrane potential (MMP), cardiolipin content, and cytochrome c release in MC3T3-E1 cells...
November 30, 2016: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/27835069/health-effects-of-metoprolol-in-epibenthic-and-endobenthic-invertebrates-a-basis-to-validate-future-in-vitro-biotests-for-effect-based-biomonitoring
#12
Dirk Jungmann, Kristin Berg, Andreas Dieterich, Martin Frank, Tonya Gräf, Marco Scheurer, Simon Schwarz, Carmen Siewert, Matthias Oetken
The aim of this study was to determine the effect data for metoprolol as a model substance for beta-blockers in aquatic invertebrates. The results will be used as a basis for the validation of future mode of action-based in vitro test systems targeting this class of pharmaceuticals. Effects of metoprolol were investigated in two autochthonous species with high relevance in stream ecology: the amphipod Gammarus fossarum and the oligochaete Lumbriculus variegatus. Mortality in G. fossarum was not observed in acute toxicity testing (48 h), and a significant increase of mortality at 45 mg/L was found when amphipods were exposed chronically (40 days)...
November 11, 2016: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/27835067/effect-of-the-lipid-regulator-gemfibrozil-in-the-cladocera-daphnia-magna-at-different-temperatures
#13
Beatriz Salesa, María D Ferrando, María J Villarroel, Encarna Sancho
In the present study, an ecotoxicological approach to the evaluation of Gemfibrozil (GEM) as an emerging organic pollutant was done. In order to assess its toxicity, tests were conducted using the cladocera Daphnia magna. Experiments were carried out at 22°C and 28°C. EC50, feeding behavior, and chronic toxicity tests (21 days) were evaluated in D. magna exposed to GEM as well as cholesterol levels at 21-day chronic exposure. D. magna GEM EC50 values (24 h) in our experimental conditions were 148.75 and 116...
November 11, 2016: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/27835063/characterization-of-heavy-metal-contamination-in-the-soil-and-sediment-of-the-three-gorges-reservoir-china
#14
Tujin Wang, Jin Pan, Xuelian Liu
This paper analyzes the concentration, distribution, bioavailability, and potential heavy metal contamination risk of Cu, Pb, Cd, Zn, and Cr in the soil and sediment of the Three Gorges Reservoir (TGR). In this paper, 14 stations that cover the upper reaches to the lower reaches of the TGR were selected. The spatial distribution of heavy metals in the TGR showed that the average concentrations of Cu, Pb, Cd, Zn, and Cr were higher in the upper and lower reaches than those in the middle reaches because of industrial and agricultural activities as well as natural processes (e...
November 11, 2016: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/27835057/effects-of-4-nonylphenol-on-the-steroidogenesis-of-human-adrenocarcinoma-cell-line-nci-h295r
#15
Jana Bistakova, Zsolt Forgacs, Zsuzsa Bartos, Maria Racz Szivosne, Tomas Jambor, Zuzana Knazicka, Eva Tvrda, Lubica Libova, Zofia Goc, Peter Massanyi, Norbert Lukac
In this study, the human H295R adrenocarcinoma cell line was exposed to different concentrations (0.04, 0.2, 1.0, 2.5 or 5 µg/mL) of nonylphenol (NP) to investigate its impact on the inhibition or induction of the steroid hormones production during 48 h of in vitro culture. The hormone production was measured using ELISA kits. Results of this in vitro study suggest various effect of nonylphenol in relatively low concentrations on the selected steroid hormones production by the human H295R adrenocarcinoma cell line...
November 11, 2016: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/27835054/subcritical-water-oxidation-of-6-aminopenicillanic-acid-and-cloxacillin-using-h2o2-k2s2o8-and-o2
#16
Erdal Yabalak, H Ali Döndaş, Ahmet Murat Gizir
This study was undertaken to investigate the degradation of 6-aminopenicillanic acid (6-APA) and cloxacillin in aqueous solution by the combined effect of subcritical water and the oxidising agents O2, H2O2, and K2S2O8. Nano ZnO was used as a solid catalyst. Response surface methodology was used to determine the optimum experimental parameters (temperature, treatment time, and concentration of oxidising agent). For 6-APA, the maximum organic carbon (TOC) removal rates of 83.54%, 81.11% and 42.42% were obtained using H2O2, K2S2O8, and O2, respectively...
November 11, 2016: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/27791821/risk-assessment-of-polycyclic-aromatic-hydrocarbons-pahs-in-river-nile-up-and-downstream-of-a-densely-populated-area
#17
Wael Abdel-Moneim Omar, Hamada M Mahmoud
A biomonitoring study was conducted to evaluate levels of eleven polycyclic aromatic hydrocarbons (PAHs) in water, sediment and wild Nile tilapia (Oreochromis niloticus) samples collected up- and downstream of Cairo sector of the River Nile, Egypt. The scaled mass index (SMI), as a fish body mass-length relationship, performed better in indicating the ecosystem and fish conditions. The total PAHs in water samples had a range of 0.0156-0.0269 mg/L, while that in sediment samples ranged from 0.723 to 1.078 mg/kg dry weight and that in fish muscles ranged from 4...
October 28, 2016: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/27791485/interrelationships-among-geotechnical-and-leaching-properties-of-a-cement-stabilized-contaminated-soil
#18
Reginald B Kogbara
Relationships among selected performance properties have been established using experimental data from a cement-stabilized mixed contaminated soil. The sandy soil was spiked with 3,000 mg/kg each of Cd, Cu, Pb, Ni and Zn, and 10,000 mg/kg of diesel. It was then treated with 5%, 10%, 15%, and 20% dosages of Portland cement. Different water contents were considered for lower dosage mixes. Selected geotechnical and leaching properties were determined on 28-day old samples. These include unconfined compressive strength (UCS), bulk density, porosity, hydraulic conductivity, leachate pH and granular leachability of contaminants...
October 28, 2016: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/27791477/synergistic-effect-of-the-presence-of-suspended-and-dissolved-matter-on-the-removal-of-cyanide-from-coking-wastewater-by-tio2-photocatalysis
#19
Noelia Pueyo, Natividad Miguel, Rosa Mosteo, José L Ovelleiro, María P Ormad
This study assesses the influence of the presence of suspended and dissolved matter on the efficiency of TiO2 photocatalysis for the removal of cyanide from coking wastewater. Photocatalytic processes were carried out at basic pH (pH 9) with titanium dioxide (1 g/L), artificial radiation (290-800 nm) and during different time periods (20-100 min). The first assays applied in aqueous solutions achieved promising results in terms of removing cyanide. The maximum cyanide removal obtained in coking wastewater was 89% after 80 min of irradiation in the presence of suspended and dissolved matter...
October 28, 2016: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/27791475/behavior-of-radioactive-materials-and-safety-stock-of-contaminated-sludge
#20
Ikuo Tsushima
The radioactive fallout from the Fukushima Dai-ichi nuclear power plant disaster in 2011 has flowed into and accumulated in many wastewater treatment plants (WWTPs) via sewer systems; this has had a negative impact on WWTPs in eastern Japan. The behavior of radioactive materials was analyzed at four WWTPs in the Tohoku and Kanto regions to elucidate the mechanism by which radioactive materials are concentrated during the sludge treatment process from July 2011 to March 2013. Furthermore, numerical simulations were conducted to study the safe handling of contaminated sewage sludge stocked temporally in WWTPs...
October 28, 2016: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
journal
journal
33054
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"