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

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https://read.qxmd.com/read/30755091/assessments-of-seasonal-trend-gas-particle-partitioning-and-deposition-flux-of-polycyclic-aromatic-hydrocarbons-at-a-semi-rural-site
#1
Fatma Esen, Yücel Tasdemir, Yıldız Mine Bozkurt
Air samples were collected at a semi-rural area between February 2013 and February 2014 to determine the concentrations and gas/particle partitionings of polycyclic aromatic hydrocarbons (PAHs). The sampling was done with a high volume air sampler to cover four seasons and 40 samples were taken. Each sample period was about 24 h. The gas-particle partition coefficients (Kp ) of PAHs were calculated and correlated with their subcooled liquid vapor pressures ( <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:msubsup> <mml:mrow> <mml:mi>P</mml:mi> </mml:mrow> <mml:mtext>L</mml:mtext> <mml:mn>0</mml:mn> </mml:msubsup> </mml:mrow> </mml:math> )...
February 12, 2019: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://read.qxmd.com/read/30755080/metal-removal-and-morphological-changes-of-b-megaterium-in-the-presence-of-a-spent-catalyst
#2
Andrea M Rivas-Castillo, María E Guatemala-Cisneros, Marlenne Gómez-Ramírez, Norma G Rojas-Avelizapa
Spent catalysts represent an environmental concern, mainly due to their elevated metal content. Although conventional treatment methods for spent catalysts are available, they generate large volumes of potentially harmful wastes and gaseous emissions. To overcome the environmental impact, biotechnological approaches are currently being explored and developed. Thus, the current study assayed the capability of Bacillus megaterium strain MNSH1-9K-1 to remove Al, Ni, V and Ti contained in the spent catalyst coded as ECAT-TL-II...
February 12, 2019: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://read.qxmd.com/read/30741124/removal-of-inorganic-chemical-species-and-organic-matter-from-slaughterhouse-wastewater-via-calcium-acetate-synthesized-from-eggshell
#3
Laura Garduño-Pineda, Ivonne Linares-Hernández, Marcos J Solache-Ríos, Alejandra Teutli-Sequeira, Verónica Martínez-Miranda
The physicochemical treatment (PT) of slaughterhouse wastewater (SWW) was investigated. In the first stage, calcium acetate (Ca(Ac)2 ) was synthesized in five different ways: (1) acetic acid (HAc) and chicken eggshell (CaAc1), (2) lime (CaAc2), (3) a 1:1 eggshell and lime mixture (CaAc3), (4) a 1:2 eggshell and lime mixture (CaAc4), and (5) calcium oxide via the calcination of eggshell (CaAc5). The synthesized Ca(Ac)2 samples were characterized by IR, SEM, XRD, and EDS. Subsequently, the samples were used to precipitate oxyanions and organic matter...
February 10, 2019: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://read.qxmd.com/read/30732533/effects-of-pcb-77-in-adult-zebrafish-after-exposure-during-early-life-stages
#4
Carla Quintaneiro, Amadeu M V M Soares, Diana Costa, Marta S Monteiro
Polychlorinated biphenyls (PCBs) are a class of industrial chemicals that cause endocrine changes, since they are able to bind to estrogen receptors and interfere with estrogen-regulated processes, such as fish vitellogenesis. Therefore, the present work aimed to assess potential endocrine effects of PCB-77 exposure during zebrafish (Danio rerio) gonadal differentiation. To achieve that, zebrafish juveniles were exposed to increasing concentrations of PCB-77 for 14 days during a critical window of gonad differentiation (30-44 days post-fertilization)...
February 7, 2019: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://read.qxmd.com/read/30729861/efficacy-of-ureolytic-enterobacter-cloacae-emb19-mediated-calcite-precipitation-in-remediation-of-zn-ii
#5
Amrik Bhattacharya, S N Naik, S K Khare
In this study, urease mediated calcite precipitation technique was used for remediation of Zn (II). A urease positive Enterobacter cloacae EMB19 was used to produce calcite impregnated with Zn ions. In co-presence of Ca (II), Zn (II) concentrations of 10 and 20 mg L-1 were completely remediated by the bacterium from the media at 72 and 96 h of incubation, respectively. Co-precipitation of Ca (II) and Zn (II) to form calcite-Zn precipitate is one of the major mechanisms of Zn remediation in the present study...
February 7, 2019: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://read.qxmd.com/read/30729857/the-occurrence-and-dynamics-of-polychlorinated-hydrocarbons-in-roe-deer-capreolus-capreolus-in-south-western-slovakia
#6
Marcela Capcarova, Jaroslav Slamecka, Rastislav Jurcik, Tomas Sladecek, Agnieszka Gren, Maria-Jose Carrascosa Argente, Peter Massanyi
The goal of this study was to determined polychlorinated biphenyls (PCBs) and organochlorine pesticides in the depot fat of roe deer (Capreolus capreolus) coming from south-western Slovakia. The mutual correlations of the organic pollutants were analyzed. The study included dichlorodiphenyltrichloroethane (DDT), hexachlorobenzen (HCB), alpha-hexachlorocyclohexane and beta-hexachlorocyclohexane (α + β-HCH), gamma-hexachlorocyclohexane (γ-HCH), and polychlorinated biphenyls (PCB-delor). The gas chromatograph with an electron capture detector ECD was used for analysis...
February 7, 2019: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://read.qxmd.com/read/30729856/influence-of-electro-osmosis-on-physicochemical-parameters-and-microstructure-of-clay-soils
#7
V A Korolev, D S Nesterov
The change in properties and structure of clay soils due to electro-osmosis was studied. These alterations were exemplified by mantle loam and kaolin. It is shown that electro-osmotic treatment of the soils on the open scheme resulted in the transformations in their moisture content, total and dry density, salinity, pH, and the parameters of their particles. The most notable changes occurred within the diffuse double layers (DDLs) of soil particles such as their recharge in the anodic zone. The transformations of the loam particles DDLs resulted in their aggregation in the cathodic and anodic zones...
February 7, 2019: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://read.qxmd.com/read/30729849/two-stage-thermophilic-anaerobic-co-digestion-of-corn-stover-and-cattle-manure-to-enhance-biomethane-production
#8
Gail Joseph, Bo Zhang, Quazi Mahzabin Rahman, Lijun Wang, Abolghasem Shahbazi
Two-stage thermophilic anaerobic co-digestion of cattle manure and corn stover was conducted to increase biomethane production. The first stage pre-digestion of corn stover was studied based on the following treatment variables: corn stover to liquid fraction of digestate (CS:LFD) ratio (1:7, 1:10, 1:13, 1:14), digestion temperature (55 °C, 60 °C) and digestion time (3, 7, 14 days). The reduction in lignin, cellulose and hemicellulose (LCH) was between 3.97% and 11.98%, which increased the biodegradability of corn stover...
February 7, 2019: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://read.qxmd.com/read/30729839/enhancing-hydrogen-production-through-anaerobic-co-digestion-of-fruit-waste-with-biosolids
#9
Anbazhagan Sethupathy, Chelliah Arun, Galavila Ravi Teja, Palani Sivashanmugam
In the present study, anaerobic co-digestion process was carried out with 23 mixed substrates proportion (MSP) of fruit waste (FRW), municipal wastewater treatment plant aerated biosolid (MPABS) and dairy effluent treatment plant returned biosolid (DPRBS). During co-digestion process, the effect of MSP on carbon/nitrogen (C/N) ratio and hydrogen production was investigated. The results revealed that MSP17 (70 FRW:20 MPABS:10 DPRBS) has yielded maximal hydrogen production of 295 mL with C/N ratio of 30, followed by MSP9 (70 FRW:30 DPRBS) exhibiting 253 mL of hydrogen production with C/N ratio of 29 and MSP2 (90 FRW:10 MPABS) attained 223 mL of hydrogen production with C/N ratio of 27...
February 7, 2019: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://read.qxmd.com/read/30688169/energy-budget-in-alona-guttata-chydoridae-aloninae-and-toxicant-induced-alterations
#10
Olga C Osorio-Treviño, Mario A Arzate-Cárdenas, Roberto Rico-Martínez
Although chydorids are the most diverse cladocerans in the world, there is still little information available related to their biology and even less with respect to their susceptibility to toxicants. Therefore, this work aimed to implement protocols with Alona guttata for acute, chronic, and sublethal toxicity tests, using the environmental concern toxicants deltamethrin (DM) and lead (Pb2+), which are commonly used due to agriculture and vector control or for the automotive industry, respectively. Once the results of LC50 (0...
January 26, 2019: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://read.qxmd.com/read/30688160/arsenic-adsorption-on-fe-mn-modified-granular-activated-carbon-gac-femn-batch-and-fixed-bed-column-studies
#11
Jasmina Nikić, Jasmina Agbaba, Malcolm A Watson, Aleksandra Tubić, Marko Šolić, Snežana Maletić, Božo Dalmacija
Granular activated carbon (GAC) was modified with Fe-Mn binary oxide to produce a novel effective hybrid adsorbent (GAC-FeMn) for simultaneous removal of As(III) and As(V) from water. After characterization (including BET, SEM/EDS and XRD analyses) of the raw and modified GAC, FTIR analysis before and after As removal showed that ligand exchange was the major mechanism for As removal on GAC-FeMn. Sorption kinetics followed pseudo-second order kinetics for both As(III) and As(V) and were not controlled by intraparticle diffusion...
January 26, 2019: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://read.qxmd.com/read/30686115/peroxymonosulfate-promoted-wet-air-oxidation-of-a-real-wastewater-from-a-biodiesel-production-plant
#12
Rafael R Solís, F Javier Rivas
Wastewater from a real biodiesel plant located in the province of Badajoz (Spain) has been treated by means of the Wet air oxidation (WAO) process. The effluent was slightly acidic (pH = 5.77) with a high content of chemical oxygen demand (COD) (43.1 g L-1 ) mainly of organic nature (CTOC  = 10.5 g L-1 ). The low biodegradability of this effluent (relation biological-chemical oxygen demand BOD/COD = 8.6 × 10-3 ), suggests the suitability to be treated by WAO oxidation. The main WAO operational variables (oxygen pressure, temperature and pH), the use of homogeneous catalysis (Cu2+ ), or the addition of oxidant promoters (H2 O2 or peroxymonosulfate (PMS)) were explored...
January 26, 2019: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://read.qxmd.com/read/30686111/efficacy-of-copper-and-silver-as-residual-disinfectants-in-drinking-water
#13
Enue E Sicairos-Ruelas, Charles P Gerba, Kelly R Bright
Contamination events and biofilms can decrease the amount of free chlorine available in drinking water systems. The efficacy of 100 μg/L silver and 400 μg/L copper, individually and combined, were evaluated as secondary, longer-lasting residual disinfectants against Salmonella enterica serovar Typhimurium, Escherichia coli, Listeria monocytogenes, and Mycobacterium fortuitum at 24 °C and 4 °C. A >5.0-log10 reduction was observed in E. coli and L. monocytogenes after three hours and S. Typhimurium following seven hours of exposure to silver...
January 26, 2019: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://read.qxmd.com/read/30686094/enhanced-removal-of-sediment-associated-total-petroleum-hydrocarbons-under-bioturbation-by-polychaete-perinereis-aibuhitensis
#14
Yifan Tong, Jingyi Li, Qianhui Cheng, Caihong Gao, Yaqi Yang, Shengyan Tian
Bioturbation processes could influence the physical, chemical and biological properties of aquatic sediments and improve the mineralization of organic matter in sediment. The influence of bioturbation by polychaete Perinereis aibuhitensis on the removal of sediment-associated total petroleum hydrocarbon (TPH) was evaluated through laboratory experiment with P. aibuhitensis cultured in crude oil contaminated coastal sediment. After 60 days, the TPH concentrations in the sediments were significantly decreased compared to the initial concentrations, in which the TPH concentrations in bioturbation experiments (with worms) were significantly lower than those in control experiments (without worms) for both low (1...
January 26, 2019: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://read.qxmd.com/read/30676914/understanding-nitrogen-recovery-from-wastewater-with-a-high-nitrogen-concentration-using-microbial-electrolysis-cells
#15
M Isabel San-Martín, Raúl Mateos, Adrián Escapa, Antonio Morán
This study was aimed at understanding the effect of applied voltage, catholyte and reactor scale on nitrogen recovery from two different organic wastes (digestate and pig slurry) by means of microbial electrolysis cell (MEC) technology. For this purpose, MEC sizes of 100, 500 and 1000 mL were tested at applied voltages of 0.6, 1 and 1.4 V using either a phosphate-buffered solution or NaCl solution as the catholyte. By increasing the reactor size from 500 to 1000 mL, a decrease in the ammonia recovery efficiency from 47 to 42% was observed...
January 24, 2019: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://read.qxmd.com/read/30676879/are-the-green-synthesized-nanoparticles-safe-for-environment-a-case-study-of-aquatic-plant-azolla-filiculoides-as-an-indicator-exposed-to-magnetite-nanoparticles-fabricated-using-microwave-hydrothermal-treatment-and-plant-extract
#16
Saeed Jafarirad, Parvin Hajat Ardehjani, Ali Movafeghi
It has been claimed that the green synthesized NPs possess no toxicity in comparison to the NPs fabricated via conventional protocols like reduction by sodium borohydride. Therefore, it is necessary to test the toxic effects of NPs on environment. In the current study, we report the binding of Fe3 O4 NPs to galate ions containing biomaterial namely "galate bio-capping agent". The bio-capping agent is simply mixed with the Fe3+ cations at pH 8 to produce negatively charged bio-capped Fe3 O4 NPs. Finally, the toxic effects of the Fe3 O4 NPs were investigated on some growth and developmental indices of the aquatic plant species Azolla filiculoides...
January 24, 2019: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://read.qxmd.com/read/30676877/effects-of-4-chlorophenol-toxicity-on-sludge-performance-and-microbial-community-in-sequencing-batch-reactors
#17
Jianguo Zhao, Yahe Li, Yu Li, Haojie Yang, Dehuan Hu, Hongzhong Zhang
In this study, the effects of 4-chlorophenol (4-CP) influent concentrations ranging from 10 to 100 mg L-1 on sludge toxicity, enzymatic activity and microbial community, along with their correlations, were investigated in a sequencing batch bioreactor (SBR), which was defined as the acclimated SBR. Another SBR was set as a control group that did not receive the influent 4-CP. The results showed that the sludge toxicity increased as the influent 4-CP increased, exhibiting a positive correlation with 4-CP loads...
January 24, 2019: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://read.qxmd.com/read/30676862/activity-of-the-soil-enzymes-and-moss-and-lichen-biomonitoring-method-used-for-the-evaluation-of-soil-and-air-pollution-from-tailing-pond-in-ni%C3%A5-n%C3%A3-slan%C3%A3-slovakia
#18
Lenka Demková, Július Árvay, Lenka Bobuľská, Martin Hauptvogl, Miloslav Michalko
The surrounding of the poorly maintained tailing ponds is endangered by the toxic substances and represents a serious risk for the health of the local population. The aim of the study was to determine the soil pollution by the hazardous elements (As, Cr, Cd, Cu, Fe, Mn, Ni, Pb, Zn) around the tailing pond using contamination factor (Cf ), degree of contamination (Cd ) and pollution load index (PLI). The health and the condition of soil were evaluated by soil enzyme activity (urease, acid and alkaline phosphatase, florescein diacetate, and ß-glucosidase)...
January 24, 2019: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://read.qxmd.com/read/30676291/aerobic-and-anaerobic-enrichment-cultures-highlight-the-pivotal-role-of-facultative-anaerobes-in-soil-hydrocarbon-degradation
#19
Errol D Cason, Jan-G Vermeulen, Walter J Müller, Esta van Heerden, Angel Valverde
Aliphatic and aromatic hydrocarbons are ubiquitous in the environment due to natural and anthropogenic processes. Under aerobic conditions hydrocarbons can be rapidly biodegraded but oxygenated environments often quickly become anaerobic when microbial respiration is coupled to contaminant oxidation. Most studies in literature usually focus on the initial microbial diversity of the hydrocarbon impacted environment and examine either aerobic or anaerobic conditions for enrichment. Hence, the aim of the present study was to enrich bacterial consortiums from two diesel impacted soil samples under both these conditions to assess the enrichment diversities and hydrocarbon degradation potentials...
January 24, 2019: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://read.qxmd.com/read/30676262/tolerance-of-a-sulfidogenic-sludge-to-trichloroethylene-at-microcosms-level-as-a-basis-for-a-long-term-operation-of-reactors-designed-for-its-biodegradation
#20
Mario Alberto Santana-Santos, Alberto Ordaz, Janet Jan-Roblero, Fernando Bastida González, Paola B Zárate Segura, Claudia Guerrero-Barajas
Trichloroethylene (TCE) is known as a toxic organic compound found as a pollutant in water streams around the world. The ultimate goal of the present work was to determine the TCE concentration that would be feasible to biodegrade on a long-term basis by a sulfidogenic sludge while maintaining sulfate reducing activity (SRA). Microcosms were prepared with sulfidogenic sludge obtained from a stabilized sulfidogenic UASB and amended with different TCE concentrations (100-300 µM) and two different proportions of volatile fatty acids (VFA) acetate, propionate and butyrate at COD of 2...
January 24, 2019: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
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