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

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https://www.readbyqxmd.com/read/28152340/biomonitoring-of-water-quality-of-the-osumi-devolli-and-shkumbini-rivers-through-benthic-macroinvertebrates-and-chemical-parameters
#1
Sonila Duka, Bledar Pepa, Erjola Keci, Anila Paparisto, Pranvera Lazo
Environmental monitoring of river water quality in Albania, using biological and chemical parameters, is a fast and effective way to assess the quality of water bodies.The aim of this study was to investigate Ephemeroptera, Plecoptera and Trichoptera (EPT), Biotic index-Richness using macroinvertebrates to assess the water quality, with special reference to nutrient (phosphorus and nitrogen) levels in the Devolli, Shkumbini and Osumi rivers. Our objective was to investigate the relationships between the measures of benthic macroinvertebrate communities and nutrient concentrations to assess water quality...
February 2, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28129047/accumulation-and-environmental-risk-assessment-of-heavy-metals-in-soil-and-plants-of-four-different-ecosystems-in-a-former-polymetallic-ores-mining-and-smelting-area-slovakia
#2
Lenka Demková, Július Árvay, Lenka Bobuľská, Ján Tomáš, Radovan Stanovič, Tomáš Lošák, Luboš Harangozo, Alena Vollmannová, Judita Bystrická, Janette Musilová, Ján Jobbágy
Heavy metals (Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb, and Zn) in soils and plants of four different ecosystems (forest, grassland, agro and urban ecosystem) at different distances from the source of the pollution were analyzed in order to assess and compare soil contamination in the various ecosystems and determine the potential accumulation of plants depending on the place they inhabit. Correlation relationships among heavy metals in soils differ depending on the ecosystem, and between soil and plant, the heavy metals showed significant correlation for Cu, Mn, Ni, Pb and Zn...
January 27, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28129041/survey-on-plasticizers-currently-found-in-pvc-toys-on-the-swiss-market-banned-phthalates-are-only-a-minor-concern
#3
Gregor McCombie, Sandra Biedermann, Gaby Suter, Maurus Biedermann
Plasticizers in toys are a recurring source of criticism and concern, as consumers feel they may endanger the health of their children. Most of the information available in literature concerns the presence or absence of certain phthalic acid ester plasticizers. Very little information can be found in the public domain with respect to the actually used plasticizers at a given time and place. In this paper, we present the plasticizer composition of 118 samples from 88 polyvinyl chloride toys found on the Swiss market in autumn 2015...
January 27, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28095185/seasonal-age-and-sex-fluctuations-in-aflatoxin-b1-content-in-the-liver-and-kidney-of-brown-hares-lepus-europaeus-pall
#4
Jaroslav Slamecka, Marcela Capcarova, Rastislav Jurcik, Tomas Sladecek, Maria-Jose Carrascosa Argente, Agnieszka Gren, Peter Massanyi
The goal of this study was to monitor the accumulation of aflatoxin B1 in the liver and kidney of brown hares (Lepus europaeus Pall) in the region of south-western Slovakia. A total of 65 samples were involved for analysis by RIA method. Brown hares were divided into the groups according to age, sex and season (month). The sex was determined visually after shooting, and the age was assigned from dried eye lens. The average concentration of AFB1 in the liver of hares was 0.54 ± 0.053 µg/kg, and lower values were measured in the kidney (0...
January 17, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28095183/total-mercury-concentrations-in-white-and-striped-mullet-mugil-curema-and-m-cephalus-from-a-coastal-lagoon-in-the-se-gulf-of-california
#5
Jorge Ruelas-Inzunza, Cinthia K Kohen-Sandoval, Mauricio A Ramos-Osuna, Karla G Sánchez-Osuna, Pamela Spanopoulos-Zarco, Carolina G Delgado-Alvarez, Felipe Amezcua-Martínez
The White and Striped mullets (Mugil curema and M. cephalus) are highly abundant and commercially important estuarine fish in northwest (NW) Mexico. Because of their feeding habits and habitat, they are likely to accumulate mercury (Hg) in their muscle and liver. The objectives of this study were to determine total Hg distribution in the tissues of interest, to correlate Hg levels between tissues and with length and weight of fish, to estimate the percentage weekly intake (PWI) of total Hg and methyl Hg (MeHg) through consumption of both mullet species, and to compare total Hg levels with mullets from other areas...
January 17, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28095182/effect-of-intermittent-aeration-on-microbial-diversity-in-an-intermittently-aerated-ifas-reactor-treating-municipal-wastewater-a-field-study
#6
Akansha Bhatia, Nitin Kumar Singh, Timsi Bhando, Ranjana Pathania, Absar Ahmad Kazmi
In the present study, the effect of three intermittent aeration (IA) cycles on treatment performance and microbial diversity was investigated in an integrated fixed film activated sludge (IFAS) reactor treating municipal wastewater. The results showed that IA strategies were able to achieve efficient removal of organics and nitrogen ranging between 90 and 95% and 70 and 80%, respectively, however the phosphorus removal was found to be inversely proportional to the duration of aeration off time in each IA cycle...
January 17, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28095118/modeling-and-optimization-of-lime-based-stabilization-in-high-alkaline-arsenic-bearing-sludges-with-a-central-composite-design
#7
Jie Lei, Bing Peng, Xiaobo Min, Yanjie Liang, Yang You, Liyuan Chai
This study focuses on the modeling and optimization of lime-based stabilization in high alkaline arsenic-bearing sludges (HAABS) and describes the relationship between the arsenic leachate concentration (ALC) and stabilization parameters to develop a prediction model for obtaining the optimal process parameters and conditions. A central composite design (CCD) along with response surface methodology (RSM) was conducted to model and investigate the stabilization process with three independent variables: the Ca/As mole ratio, reaction time and liquid/solid ratio, along with their interactions...
January 17, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28085559/enrichment-and-assessment-of-the-health-risks-posed-by-heavy-metals-in-pm1-in-changji-xinjiang-china
#8
Yu Y Liu, Ya X Shen, Cheng Liu, Hao F Liu
The present study aims to investigate the influence of human activity on heavy metals in a typical arid urban area of China and assess human health risks posed by heavy metals in PM1 (particles <1.0 μm in diameter) for different people. In this paper, Changji (Xinjiang, China) was selected as the study area, and samples were collected from March 2014 to March 2015. A total 14 elements in PM1 were quantified using ICP-MS. An enrichment factor (EF) was used to assess the influence of human activity on the contamination of these metals...
January 13, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28085558/net-positive-energy-wastewater-treatment-plant-via-thermal-pre-treatment-of-sludge-a-theoretical-case-study
#9
Ehsan Farno, Jean Christophe Baudez, Rajarathinam Parthasarathy, Nicky Eshtiaghi
In a wastewater treatment process, energy is mainly used in sludge handling and heating, while energy is recovered by biogas production in anaerobic digestion process. Thermal pre-treatment of sludge can change the energy balance in a wastewater treatment process since it reduces the viscosity and yield stress of sludge and increases the biogas production. In this study, a calculation based on a hypothetical wastewater treatment plant is provided to show the possibility of creating a net positive energy wastewater treatment plant as a result of implementing thermal pre-treatment process before the anaerobic digester...
January 13, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28085556/salt-stress-induced-changes-in-antioxidative-defense-system-and-proteome-profiles-of-salt-tolerant-and-sensitive-frankia-strains
#10
Amrita Srivastava, Anumeha Singh, Satya S Singh, Arun K Mishra
An appreciation of comparative microbial survival is most easily done while evaluating their adaptive strategies during stress. In the present experiment, antioxidative and whole cell proteome variations based on spectrophotometric analysis and SDS-PAGE and 2-dimensional gel electrophoresis have been analysed among salt-tolerant and salt-sensitive Frankia strains. This is the first report of proteomic basis underlying salt tolerance in these newly isolated Frankia strains from Hippophae salicifolia D. Don. Salt-tolerant strain HsIi10 shows higher increment in the contents of superoxide dismutase, catalase and ascorbate peroxidase as compared to salt-sensitive strain HsIi8...
January 13, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28085554/caenorhabditis-elegans-as-a-model-to-study-the-impact-of-exposure-to-light-emitting-diode-led-domestic-lighting
#11
Fawzia Abdel-Rahman, Bethel Okeremgbo, Fatimah Alhamadah, Sakha Jamadar, Kevin Anthony, Mahmoud A Saleh
This study aimed to investigate the biological impact of exposure on domestic light emitting diodes (LED) lighting using the free-living nematode Caenorhabditis elegans as a model. Nematodes were separately exposed to white LED light covering the range of 380-750 nm, blue light at 450 nm and black light at 380-420 nm for one life cycle (egg to adult) with dark exposure as the control. Each light range induced stress to the nematode C. elegans such as reducing the number of the hatched eggs and/or delayed the maturation of the hatched eggs to the adult stage...
January 13, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/27996368/optimization-of-an-acidic-digestion-method-for-the-determination-of-total-pb-concentration-and-its-isotope-ratios-in-human-blood-using-icp-qms
#12
Rebeca Y Pérez-Rodríguez, Javier Castro-Larragoitia, María C Alfaro-De La Torre, Fernando Díaz-Barriga
Adverse effects of lead (Pb) on human health are observed even at levels below 5 μg/dL, affecting principally the children population and suggesting that there is not a safe exposure level. The determination of Pb isotopic ratios (LIRs) in biological and environmental samples, is an appropriate tool to track and control the exposure sources, because LIRs constitutes the pollutant's isotopic signature and hence can be used to identify sources of Pb emission. This study proposes the optimization of a method in order to significantly reduce the biological samples' matrix interferences, and improves precision and accuracy in the measurements of LIRs...
December 20, 2016: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/27973995/comparison-between-hpsec-ocd-and-f-eems-for-assessing-dbps-formation-in-water
#13
Euis Nurul Hidayah, Yung-Chen Chou, Hsuan-Hsien Yeh
In this study, natural organic matter (NOM) in source water, as well as the treated water after coagulation with or without potassium permanganate (KMnO4) preoxidation, was characterized by using high performance size exclusion chromatography with organic carbon detector (HPSEC-OCD) and fluorescence excitation emission matrices (F-EEMs) with parallel factor (PARAFAC) analysis. Bulk parameters, such as dissolved organic carbon (DOC) and ultraviolet light absorbance at 254 nm (UV254), were also analyzed. The results show that KMnO4 preoxidation caused the breakdown of high molecular weight (MW) organics into low MW organics...
December 14, 2016: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/27973994/influence-of-static-magnetic-fields-up-to-700-mt-and-dihydrochalcones-on-the-antioxidant-response-in-fibroblasts
#14
Agnieszka Synowiec-Wojtarowicz, Magdalena Kimsa-Dudek, Katarzyna Pawłowska-Góral, Ewa Kurzeja, Marek Glinka, Stanisław Gawron
The effects of a static magnetic field (SMF) and the dihydrochalcones phloretin and phloridzin on the redox homeostasis of fibroblasts were investigated. The aim of the present study was to determine the redox homeostasis of fibroblasts that were simultaneously exposed to a static magnetic field and the dihydrochalcones phloretin and phloridzin. The fibroblasts were cultured for 72 h in special magnetic test chambers at different moderate intensities (0.4, 0.55 and 0.7 T). In this report, the activities of superoxide dismutase (SOD), glutathione peroxidase (GPx), catalase (CAT), glutathione transferase (GST); the concentrations of malondialdehyde (MDA), adenosine triphosphate (ATP) and total antioxidant status were measured using commercially available kits...
December 14, 2016: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/27973987/determination-of-the-priority-substances-regulated-by-2000-60-ec-and-2008-105-ec-directives-in-the-surface-waters-supplying-water-treatment-plants-of-athens-greece
#15
Spyros K Golfinopoulos, Anastasia D Nikolaou, Nikolaos S Thomaidis, Anna Maria Kotrikla, Maria C Vagi, Andreas S Petsas, Demetris F Lekkas, Themistokles D Lekkas
An investigation into the occurrence of priority substances regulated by 2000/60/EC Water Framework Directive and 2008/105/EC Directive was conducted for a period of one year in the surface water sources supplying the water treatment plants (WTPs) of Athens and in the raw water of WTPs. Samples from four reservoirs and four water treatment plants of Athens were taken seasonally. The substances are divided into seven specific groups, including eight volatile organic compounds (VOCs), diethylhexylphthalate, four organochlorine pesticides (OCPs), three organophosphorus/organonitrogen pesticides (OPPs/ONPs), four triazines and phenylurea herbicides, pentachlorophenol, and four metals...
December 14, 2016: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/27973979/effects-of-step-feeding-and-intermittent-aeration-on-organics-and-nitrogen-removal-in-a-horizontal-subsurface-flow-constructed-wetland
#16
Sagar Patil, Saswati Chakraborty
The effect of step feed strategy and intermittent aeration on removal of chemical oxygen demand (COD) and nitrogen was investigated in a laboratory scale horizontal subsurface flow constructed wetland (HSSFCW). Wetland was divided into four zones along the length (zone I to IV), and influent was introduced into first and third zones by step feeding. Continuous study was carried out in four phases. In phases I to III, 30% of influent was bypassed to zone III for denitrification along with organics removal. Intermittent aeration was provided only in zone II at 2...
December 14, 2016: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/27960653/experimental-and-modeling-analyses-for-interactions-between-graphene-oxide-and-quartz-sand
#17
Jin-Kyu Kang, Jeong-Ann Park, In-Geol Yi, Song-Bae Kim
The aim of this study was to quantify the interactions between graphene oxide (GO) and quartz sand by conducting experimental and modeling analyses. The results show that both GO and quartz sand were negatively charged in the presence of 0-50 mM NaCl and 5 mM CaCl2 (GO = -43.10 to -17.60 mV, quartz sand = -40.97 to -8.44 mV). In the Derjaguin-Landau-Verwey-Overbeek (DLVO) energy profiles, the adhesion of GO to quartz sand becomes more favorable with increasing NaCl concentration from 0 to 10 mM because the interaction energy profile was compressed and the primary maximum energy barrier was lowered...
December 14, 2016: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/27960600/boron-removal-by-a-composite-sorbent-polyethylenimine-tannic-acid-derivative-immobilized-in-alginate-hydrogel-beads
#18
Caroline Bertagnolli, Andrey Grishin, Thierry Vincent, Eric Guibal
A novel composite material was prepared by the grafting of tannic acid on polyethylenimine (PEI), which allows an efficient sorption of boron (sorption capacity close to 0.89 mmol B g(-1)). The encapsulation of this chelating sorbent (finely crushed) facilitates its use (readily solid/liquid separation, use in fixed-bed columns) at the expense of a loss in sorption capacity (proportionally decreased by the introduction of alginate having poor efficiency for boron uptake). Sorption isotherms are modeled using the Langmuir equation, while the kinetic profiles are presented a good fit by pseudo-second order rate equation...
December 14, 2016: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/27925846/characteristics-sources-and-cytotoxicity-of-atmospheric-polycyclic-aromatic-hydrocarbons-in-urban-roadside-areas-of-hangzhou-china
#19
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
#20
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
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