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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/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/29346016/in-situ-electrochemical-manipulation-of-oxidation-reduction-potential-in-saturated-subsurface-matrices
#2
Paul H Fallgren, John J Eisenbeis, Song Jin
Application of a low-intensity electric field is known to influence oxidation-reduction (redox) potential in a saturated matrix. In this study, such redox manipulation was attempted in at a site with contaminated aquifer. At the experiment field site, electrodes connected to a direct current (DC) source provided an electric field with an intensity of 1.82 V m-1. Redox potentials at locations 3.0 m and 7.9 m from the cathode decreased by 111 mV and 33 mV within a few hours, respectively, indicating that reducing conditions in the aquifer may be established within the electric field...
January 18, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29346015/treatment-of-a-textile-effluent-by-adsorption-with-cork-granules-and-titanium-dioxide-nanomaterial
#3
Margarida Castro, Verónica Nogueira, Isabel Lopes, Maria N Vieira, Teresa Rocha-Santos, Ruth Pereira
This study aimed to explore the efficiency of two adsorbents, cork granules with different granulometry and titanium dioxide nanomaterial, in the removal of chemical oxygen demand (COD), colour and toxicity from a textile effluent. The adsorption assays with cork were unsatisfactory in the removal of chemical parameters however they eliminated the acute toxicity of the raw effluent to Daphnia magna. The assay with TiO2 NM did not prove to be efficient in the removal of colour and COD even after 240 min of contact; nevertheless it also reduced the raw effluent toxicity...
January 18, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29336720/a-novel-4-phenyl-amino-thiourea-derivative-designed-for-real-time-ratiometric-colorimetric-detection-of-toxic-pb2
#4
Yi S Guang, Xia Ren, Shuang Zhao, Quan Z Yan, Gang Zhao, Yao H Xu
The objective of this study was to develop a ratiometric and colorimetric organic sensor for Pb2+ detection in environmental samples. A new probe 4-phenyl amino thiourea (PAT) was designed and synthesized using hydrazine hydrate and phenyl isothiocyanate as raw materials. After its structure was characterized and confirmed, its UV-vis spectral property was investigated in detail. PAT possesses a specifically real-time, ratiometric and colorimetric response to Pb2+ in dimethyl formamide (DMF)/H2O (v/v = 9:1, pH = 7...
January 16, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29334019/chemical-stabilization-of-polymers-implications-for-dermal-exposure-to-additives
#5
N Bartsch, M Girard, L Schneider, V Van De Weijgert, A Wilde, O Kappenstein, B Vieth, C Hutzler, A Luch
Technical benefits of additives in polymers stand in marked contrast to their associated health risks. Here, a multi-analyte method based on gas chromatography coupled to tandem mass spectrometry (GC-MS/MS) was developed to quantify polymer additives in complex matrices such as low-density polyethylene (LDPE) and isolated human skin layers after dermal exposure ex vivo. That way both technical aspects and dermal exposure were investigated. The effects of polymer additivation on the material were studied using the example of LDPE...
January 15, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29303426/methods-for-the-analysis-of-organophosphorus-flame-retardants-comparison-of-gc-ei-ms-gc-nci-ms-lc-esi-ms-ms-and-lc-apci-ms-ms
#6
Masahiro Tokumura, Yuichi Miyake, Qi Wang, Hayato Nakayama, Takashi Amagai, Sayaka Ogo, Kazunari Kume, Takeshi Kobayashi, Shinji Takasu, Kumiko Ogawa
Organophosphorus flame retardants (PFRs) are extensively used as alternatives to banned polybrominated diphenyl ethers (PBDEs) and hexabromocyclododecane (HBCD). In this study, we analyzed 14 PFRs by means of four mass-spectrometry-based methods: gas chromatography combined with electron-impact mass spectrometry (GC-EI-MS) or negative-chemical-ionization mass spectrometry (GC-NCI-MS) and liquid chromatography combined with tandem mass spectrometry using electrospray ionization (LC-ESI-MS/MS) or atmospheric pressure chemical ionization (LC-APCI-MS/MS)...
January 5, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29303410/relationship-of-nutrient-dynamics-and-bacterial-community-structure-at-the-water-sediment-interface-using-a-benthic-chamber-experiment
#7
Bo-Min Ki, In Ae Huh, Jung-Hyun Choi, Kyung-Suk Cho
The relationships between nutrient dynamics and the bacterial community at the water-sediment interface were investigated using the results of nutrient release fluxes, bacterial communities examined by 16S rRNA pyrosequencing and canonical correlation analysis (CCA) accompanied by lab-scale benthic chamber experiment. The nutrient release fluxes from the sediments into the water were as follows: -3.832 to 12.157 mg m-2 d-1 for total phosphorus, 0.049 to 9.993 mg m-2 d-1 for PO4-P, -2.011 to 41.699 mg m-2 d-1 for total nitrogen, -7...
January 5, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29300684/flux-and-distribution-of-methane-ch4-in-the-gunsan-basin-of-the-southeastern-yellow-sea-off-the-western-korea
#8
Jun-Ho Lee, Han Jun Woo, Seung-Kyu Son, Moonkoo Kim, Dong-Hun Lee, Urumu Tsunogai, Kap-Sik Jeong
The flux and distribution of methane (CH4) was investigated in the seawater column at 14 stations in the Gunsan Basin, the southeastern part of Yellow Sea from 2013 to 2015. Here CH4 is concentrated 2.4-4.7 (3.4 ± 0.7) nM in the surface and 2.5-7.4 (5.2 ± 1.7) nM in the bottom layer. The CH4 saturation ratios ranged from 65.5% to 295.5% (162.6 ± 68.7), comprising the mean sea-to-air CH4 flux of 3.8 to 25.3 (15.6 ± 5.5) µM m-2d-1. Methane concentration was largely different in the upper and the lower seawater layers that is separated by the thermocline of which depth is variable (20-60 m) depending on the time of sampling...
January 4, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29300682/co-biodegradation-of-anthracene-and-naphthalene-by-the-bacterium-acinetobacter-johnsonii
#9
Yan Jiang, Hui Qi, Xian M Zhang
NAP (Naphthalene) and ANT (anthracene) usually co-exist in environment and possessed interactional effects on their biodegradation in environment. Presently, a strain of Acinetobacter johnsonii was employed to degrade NAP and ANT in single- and dual-substrate systems. NAP was utilized as prefer substrate by cells to accelerate ANT biodegradation. As much as 200 mg L-1 ANT could be entirely degraded with 1,500 mg L-1 NAP, which was beyond bacterial potential in single substrate system. Especially, the shortest biodegradation period (103 h) for ANT was observed with the presence of 50 mg L-1 NAP...
January 4, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29281501/estimation-of-cadmium-uptake-by-tobacco-plants-from-laboratory-leaching-tests
#10
Jelena P Marković, Mihajlo D Jović, Ivana D Smičiklas, Marija Z Šljivić-Ivanović, Slavko N Smiljanić, Antonije E Onjia, Aleksandar R Popović
The objective of the present study was to determine the impact of cadmium (Cd) concentration in the soil on its uptake by tobacco plants, and to compare the ability of diverse extraction procedures for determining Cd bioavailability and predicting soil-to-plant transfer and Cd plant concentrations. The pseudo-total digestion procedure, modified Tessier sequential extraction and six standard single-extraction tests for estimation of metal mobility and bioavailability were used for the leaching of Cd from a native soil, as well as samples artificially contaminated over a wide range of Cd concentrations...
December 27, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29281500/oxidation-of-azo-and-anthraquinonic-dyes-by-peroxymonosulphate-activated-by-uv-light
#11
Michele Pagano, Ruggiero Ciannarella, Vito Locaputo, Giuseppe Mascolo, Angela Volpe
The photochemical degradation of two azo and two anthraquinonic dyes was performed using potassium peroxymonosulphate (Oxone®) activated by UV radiation. The fast decolourization of all dyes was observed within 6 min of UV irradiation, with corresponding dye decays higher than 80%. The kinetic rate constants of the dyes' decay were determined, along with the energetic efficiency of the photochemical treatment, taking into account the influence of a few anions commonly present in real wastewaters (i.e., chloride, nitrate, carbonate/bicarbonate and phosphate ions)...
December 27, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29281496/study-of-the-occurrence-and-ecosystem-danger-of-selected-endocrine-disruptors-in-the-urban-water-cycle-of-the-city-of-bogot%C3%A3-colombia
#12
Diego F Bedoya-Ríos, Jaime A Lara-Borrero, Verónica Duque-Pardo, Carlos A Madera-Parra, Eliana M Jimenez, Andrés F Toro
Endocrine disruptors have been studied for their high occurrence in different environments including aquatic; however, in the context of developing countries, their occurrence, magnitude and potential threat have little information. This study involved the analysis of various components of the urban water cycle in the city of Bogotá, Colombia. As a result, it was found that the compounds with the highest occurrence are plasticizers such as phthalates and bisphenol A, whereas among the drugs, carbamazepine presented the highest concentrations (0...
December 27, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29281480/improved-salt-removal-and-power-generation-in-a-cascade-of-two-hydraulically-connected-up-flow-microbial-desalination-cells
#13
Surajbhan Sevda, Ibrahim M Abu-Reesh
A novel two chamber up-flow microbial desalination cell (UMDC) was designed for evaluating desalination of real seawater with simultaneous wastewater treatment and energy generation. Two UMDCs were hydraulically connected in continuous flow mode (cascade mode) and operated at ten different hydraulic retention times (HRTs) [120 h to 12 h] and salt retention times (SRTs) [40 h to 4 h] for improved performance of chemical oxygen demand (COD) and salt removal. These UMDCs were operated at different combinations of high power (higher external resistance) and high current (low external resistance) mode to find the most suitable conditions for obtaining higher COD removal, salt removal, power production and current generation...
December 27, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29278989/carcinogenic-and-non-carcinogenic-risk-assessments-of-arsenic-contamination-in-drinking-water-of-ardabil-city-in-the-northwest-of-iran
#14
Fatemeh Sadeghi, Simin Nasseri, Masud Yunesian, Ramin Nabizadeh, Mohammad Mosaferi, Alireza Mesdaghinia
Based on the environmental health assessment framework of the United State Environmental Protection Agency, a quantitative health risk assessment of arsenic in contaminated drinking water in a city in the northwest of Iran has been carried out. In the exposure assessment step, arsenic concentrations in drinking water were determined during four seasons. In addition, the water ingestion rate for different age groups in this region was determined. The concentration of arsenic in 163 collected samples from different locations during four seasons ranged from 0 to 99 μg L-1...
December 26, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29278978/statistical-optimization-of-arsenic-biosorption-by-microbial-enzyme-via-ca-alginate-beads
#15
Suchetana Banerjee, Anindita Banerjee, Priyabrata Sarkar
Bioremediation of arsenic using green technology via microbial enzymes has attracted scientists due to its simplicity and cost effectiveness. Statistical optimization of arsenate bioremediation was conducted by the enzyme arsenate reductase extracted from arsenic tolerant bacterium Pseudomonas alcaligenes. Response surface methodology based on Box-Behnken design matrix was performed to determine the optimal operational conditions of a multivariable system and their interactive effects on the bioremediation process...
December 26, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29232163/application-of-mine-water-leaching-protocol-on-coal-fly-ash-to-assess-leaching-characteristics-for-suitability-as-a-mine-backfill-material
#16
Godfrey Madzivire, Koena Ramasenya, Supi Tlowana, Henk Coetzee, Viswanath R K Vadapalli
Over the years, coal mining in the Mpumalanga Province of South Africa has negatively affected the environment by causing pollution of water resources, land subsidence and spontaneous coal combustion. Previous studies show that in-situ treatment of acid mine drainage (AMD) using coal fly ash (CFA) from local power stations was possible and sludge recovered out of such treatment can be used to backfill mines. In this article, the authors have attempted to understand the leaching characteristics of CFA when placed underground as a backfill material using the mine water leaching protocol (MWLP)...
December 12, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29227181/effects-of-fuel-components-and-combustion-particle-physicochemical-properties-on-toxicological-responses-of-lung-cells
#17
Isabel C Jaramillo, Anne Sturrock, Hossein Ghiassi, Diana J Woller, Cassandra E Deering-Rice, JoAnn S Lighty, Robert Paine, Christopher Reilly, Kerry E Kelly
The physicochemical properties of combustion particles that promote lung toxicity are not fully understood, hindered by the fact that combustion particles vary based on the fuel and combustion conditions. Real-world combustion-particle properties also continually change as new fuels are implemented, engines age, and engine technologies evolve. This work used laboratory-generated particles produced under controlled combustion conditions in an effort to understand the relationship between different particle properties and the activation of established toxicological outcomes in human lung cells (H441 and THP-1)...
December 11, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29215973/dissipation-of-antimicrobial-resistance-genes-in-compost-originating-from-cattle-manure-after-direct-oral-administration-or-post-excretion-fortification-of-antimicrobials
#18
Shanwei Xu, Inoka D Amarakoon, Rahat Zaheer, Alanna Smith, Srinivas Sura, George Wang, Tim Reuter, Francis Zvomuya, Allan J Cessna, Francis J Larney, Tim A McAllister
Dissipation of antimicrobial resistance genes (ARG) during composting of cattle manure generated through fortification versus administration of antimicrobials in feed was compared. Manure was collected from cattle fed diets containing (kg-1) dry matter (DM): (1) 44 mg chlortetracycline (CTC), (2) a mixture of 44 mg each of chlortetracycline and sulfamethazine (CTCSMZ), (3) 11 mg tylosin (TYL) or (4) Control, no antimicrobials. Manures were composted for 30 d with a single mixing after 16 d to generate the second heating cycle...
December 7, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29215947/co-metabolic-degradation-of-iomeprol-by-a-pseudomonas-sp-and-its-application-in-biological-aerated-filter-systems
#19
Bingjie Xu, Bin Xu, Shiwei Shan, Gang Xue, Tianfeng Wang, Xiuwen Qiu, Changchao Zhan
The non-ionic water-soluble X-ray contrast agent iomeprol (IOM) enters the water supply through sewage treatment plants, which can cause considerable environmental harm. In this study, Pseudomonas sp. I-24 (I-24) was tested for its ability to remove IOM from water via co-metabolic pathways. The optimum removal rate of IOM by I-24 was 38.43% ± 3.70% when starch served as the source of external carbon, and its co-metabolism of IOM conformed to the first-order kinetics. The highest activity of intracellular enzyme (degrading enzyme) extracted from I-24 was 0...
December 7, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29206081/removal-of-organic-matter-of-electrodialysis-reversal-brine-from-a-petroleum-refinery-wastewater-reclamation-plant-by-uv-and-uv-h202-process
#20
Priscila B Moser, Bárbara C Ricci, Clara B Alvim, Ana C F Cerqueira, Míriam C S Amaral
Direct (UV) and hydrogen peroxide-assisted (UV/H2O2) photolysis were investigated in bench-scale for removing the organic compounds present in the electrodialysis reversal (EDR) brine from a refinery wastewater reclamation plant. In the UV/H2O2 experiments, a COD:H2O2 molar ratios of 1:1, 1:2 and 1:3 were tested by recirculating the brine in the UV reactor for 120 min. Results showed a significant reduction in UVA254, whereas no reduction was observed for chemical oxygen demand (COD), in the UV process, suggesting great cleavage but limited mineralization of the organic matter...
December 5, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
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