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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/28783410/adsorption-characteristics-of-trace-levels-of-bromate-in-drinking-water-by-modified-bamboo-based-activated-carbons
#1
Ho-Wen Chen, Yen Hsun Chuang, Cheng-Feng Hsu, Winn-Jung Huang
This study was undertaken to investigate the adsorption kinetics and isotherms of bromate (BrO3(-)) on bamboo charcoals that are activated with nitrogen and water vapor. Bamboo-based activated carbon (AC) was dipped in acid and oxidized in a mixture of potassium permanganate and sulfuric acid. Oxidation treatment considerably improved the physicochemical properties of AC, including purity, pore structure and surface nature, significantly enhancing BrO3(-) adsorption capacity. AC with many oxygenated groups and a high mesopore volume exhibited a particularly favorable tendency for BrO3(-) adsorption...
August 7, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28763254/decolorization-of-textile-dyes-in-an-air-lift-bioreactor-inoculated-with-bjerkandera-adusta-obr105
#2
Hong Sodaneath, Jung-In Lee, Seung-Ok Yang, Hyekyeng Jung, Hee Wook Ryu, Kyung-Suk Cho
A new decolorizing white-rot fungus, OBR105, was isolated from Mount Odae in South Korea and identified by the morphological characterization of its fruit body and spores and partial 18s rDNA sequences. The ligninolytic enzyme activity of OBR105 was studied to characterize their decolorizing mechanism using a spectrophotometric enzyme assay. For the evaluation of the decolorization capacity of OBR105, the isolate was incubated in an erlenmeyer flask and in an airlifte bioreator with potato dextrose broth (PDB) medium supplemented with each dye...
August 1, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28763240/dead-biomass-of-amazon-yeast-a-new-insight-into-bioremediation-and-recovery-of-silver-by-intracellular-synthesis-of-nanoparticles
#3
Marcia R Salvadori, Rômulo A Ando, Cláudio A Oller Nascimento, Benedito Corrêa
This investigation was undertaken to describe a natural process for the removal of silver and the simultaneous recovery of Ag/Ag2O nanoparticles by dead biomass of the yeast Rhodotorula mucilaginosa. The removal of silver ions from aqueous solution and the synthesis of Ag/Ag2O nanoparticles were analyzed based on physicochemical factors and equilibrium concentration, combined with transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), and infrared spectroscopy (FTIR)...
August 1, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28758877/the-effects-of-metal-ion-contaminants-on-the-double-stranded-dna-helix-and-diseases
#4
T Theophanides, J Anastassopoulou
Mineral metal ions are essential for the maintenance of the reactions that regulate homeostasis and the functions of our body. It is known that the regulation of the neurodegenerative system depends directly on life metal ions, such as Na, K, Mg, Ca, Fe, Mo, Cu, Co, Zn, Cr, Mn, while the toxic metals Cd, Pb, Hg, etc disturb homeostasis, leading to diseases. Particularly significant is the effect of toxic metals on the double stranded forms of DNA and conformations. It was found that the toxic metal ions by reacting specifically with the nucleic bases and electrostatically with the negatively phosphate groups of the DNA backbone cause changes in the structure of the DNA double helix, leading to breaks of single or double strands...
July 31, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28758874/sulfide-as-an-alternative-electron-donor-to-glucose-for-power-generation-in-mediator-less-microbial-fuel-cell
#5
Sakine Fatemi, Ali A Ghoreyshi, Mostafa Rahimnejad, Ghasem Najafpour Darzi, Deepak Pant
The objective of this study was to investigate the power generation in a dual-chamber microbial fuel cell (MFC). As one of the effective parameters, glucose concentration was studied in the range of 100-1000 mg/L. At the optimum concentration of 500 mg/L of glucose, maximum power generation was 186 mW/m(2). As an alternative, sulfide was used as an electron donor and maximum power output was 401 mW/m(2) at the concentration of 100 mg/L; which was more than twice of power produced using glucose. Moreover, sulfide removal efficiencies of 70%, 66%, 60%, and 64% were obtained when initial sulfide concentrations of 10, 20, 80, and 100 mg/L were used, respectively...
July 31, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28758837/epoxy-resin-as-a-new-alternative-sorbent-phase-for-stir-bar-sorptive-extraction-for-the-determination-of-triclosan-and-methyl-triclosan
#6
Jackeline Stoski, Natalicio F Leite, Ronei E da Paixão, Gilberto Abate
The main objective of this study is to propose a new sorbent phase based on a commercial epoxy resin, for use as an alternative sorbent in the stir bar sorptive extraction (SBSE) technique. The analytes triclosan (TCS) and methyl-triclosan (MTCS) were selected in order to demonstrate the application of the bars, using some water samples as matrices. The extraction conditions of sample volume, stirring time, pH, temperature and ionic strength were evaluated, and for the back extraction, the bars were sonicated using 1...
July 31, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28753095/a-scanner-based-colorimetric-mercuric-ion-detection-using-tween-20-stabilized-aunps-solution-in-96-well-plates
#7
Sujittra Poorahong, Anusorn Niammusik, Pawinee Chaykleang, Pproespichaya Kanatharana, Panote Thavarungkul, Chongdee Thammakhet-Buranachai
This paper reports the development of a sensitive, high-throughput colorimetric method for the detection of trace mercuric ions (Hg(2+)). The method is based on the binding of the analyte to gold nanoparticles (AuNPs) modified with Tween-20. Tween-20 was used as a nonionic stabilizer to allow a good dispersion of AuNPs in solution. When mercuric ions were added to the solution, they replaced the Tween-20 stabilizer on the surface of the AuNPs due to their stronger binding affinity. This caused the NPs to aggregate and the color of the solution to change from red to blue...
July 28, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28738174/distribution-of-ion-contents-and-microorganisms-during-the-electro-bioremediation-of-petroleum-contaminated-saline-soil
#8
Meng Zhang, Shuhai Guo, Fengmei Li, Bo Wu
This study investigated the distribution of ion contents and microorganisms during the electro-bioremediation (EK-Bio) of petroleum-contaminated saline soil. The results showed that soil ions tend to accumulate around the electrodes, and the concentration was correlated with the distance from the electrodes. The average soil ion content was 7.92 g/kg around the electrodes (site A) and 0.55 g/kg at the furthest distance from the electrodes (site B) after 112 days of treatment, while the initial average content was 3...
July 24, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28738172/impact-of-polymeric-membrane-breakage-on-drinking-water-quality-and-an-online-detection-method-of-the-breakage
#9
Qilong Wu, Zhenghua Zhang, Guodong Cao, Xihui Zhang
Polymeric membrane has been widely used for the treatment of drinking water in China, and the total treating capacity has reached up to 3.8 million m(3)/d. However, the membrane breakage found in the membrane modules in many water treatment plants resulted in an increase in turbidity and bacterial amount in the membrane permeate. In this study, a membrane module running for 3 years in a full-scale application was examined in terms of the breaking positions and the numbers of the broken fibers. It was found that most of the breaking positions were mainly on the outlet side of the module and that the distance from these points to the outlet was about 1/10-2/10 length of the membrane module...
July 24, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28738170/removal-of-pfoa-in-groundwater-by-fe-0-and-mno2-nanoparticles-under-visible-light
#10
Jia Liu, Lindsey Weinholtz, Linan Zheng, Meisam Peiravi, Yan Wu, Da Chen
The main objective of this study was to find a cost-effective, efficient and environmentally-friendly solution to remove perfluorooctanic acid (PFOA) from groundwater by using Fe(0) and MnO2 nanoparticles. The selected method was expected to be applicable to the remediation of PFOA-contaminated groundwater. Phytotoxicity of the nanoparticle treatment was studied to demonstrate the safe application of the nanomaterials. Zero-valent Fe (100 mg L(-1)) and MnO2 (100 mg L(-1)) nanoparticles, produced in our lab, were used to remove PFOA up to 10 mg L(-1)...
July 24, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28738169/behavior-of-sulfur-mustard-in-sand-concrete-and-asphalt-matrices-evaporation-degradation-and-decontamination
#11
Hyunsook Jung, Seungki Choi
The evaporation, degradation, and decontamination of sulfur mustard on environmental matrices including sand, concrete, and asphalt are described. A specially designed wind tunnel and thermal desorber in combination with gas chromatograph (GC) produced profiles of vapor concentration obtained from samples of the chemical agent deposited as a drop on the surfaces of the matrices. The matrices were exposed to the chemical agent at room temperature, and the degradation reactions were monitored and characterized...
July 24, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28737449/molecular-docking-studies-of-fused-coumarin-derivatives-as-inhibitors-of-glcn-6
#12
Sevdije Govori, Arben Haziri, Kastriot Ademi, Nexhat Neziraj
The biological activity of heterocyclic compounds depends on their structure, the type of hetero atoms in the ring and on the type of substituents present. In this paper, some heterocyclic compounds with coumarin moieties S1-S5 and novobiocin known as coumarin antibiotic were subjected to the molecular docking studies as important tools for drug discovery. Glucosamine-6-phosphate synthase is selected as a suitable target in this study. In silico studies reveal that all synthesized compounds S1-S5 are good inhibitors of GlcN-6 and the docking results are in agreement with in vitro antibacterial evaluation of compounds S1-S5...
July 24, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28737443/fertirrigation-with-sugarcane-vinasse-foreseeing-potential-impacts-on-soil-and-water-resources-through-vinasse-characterization
#13
Lucas T Fuess, Isabella J Rodrigues, Marcelo L Garcia
This paper reports the characterization of the polluting potential of sugarcane vinasse, the main wastewater from ethanol production. Compositional data from vinasse samples collected from sugarcane biorefineries were used to predict negative effects on the soil, water resources and crops potentially associated with fertirrigation, the primary final destination of vinasse in Brazil. High risks of soil salinization were associated with the land disposal of vinasse, as evidenced by the high levels of total dissolved solids (TDS; >4,000 mg L(-1)) and electrical conductivity (>6...
July 24, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28609223/the-influence-of-multiple-chemical-and-non-chemical-stressors-on-benthic-communities-in-a-mid-west-agricultural-stream
#14
Lenwood W Hall, Willian D Killen, Ronald D Anderson, Raymond W Alden
The objective of this 3-year study was to characterize benthic communities and physical habitat in an agricultural stream in the mid-west area of the United States (Big Bureau Creek, Illinois). Concurrent basic water quality parameters and seven nutrients were measured in the water column. Sediment measurements from depositional areas were conducted for bifenthrin, Total Organic Carbon, grain size, polychlorinated biphenyls (PCBs) and eight metals. All parameters were measured at 12 sites annually during the late summer for a 3-year period (2014, 2015 and 2016)...
June 13, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28598770/review-of-the-ecotoxicological-effects-of-emerging-contaminants-on-soil-biota
#15
Ana R Gomes, Celine Justino, Teresa Rocha-Santos, Ana C Freitas, Armando C Duarte, Ruth Pereira
In recent years, emerging contaminants (e.g. pesticides and their metabolites, pharmaceuticals, personal and house care products, life-style compounds, food additives, industrial products and wastes, as well as nanomaterials) have become a problem to the environment. In fact, the cumulative use of a panoply of chemical substances in agriculture, industrial activities, in our homes and in health care services has led to their recent appearance in detectable levels in soils, surface, and groundwater resources, with unpredictable consequences for these ecosystems...
June 9, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28598716/evaluation-and-application-of-a-passive-air-sampler-for-polycylic-aromatic-hydrocarbons-pahs
#16
Fatma Esen, Yildiz M Evci, Yucel Tasdemir
Sampling of 15 PAHs by the use of both passive air sampler developed (D-PAS) in our research group and PAS (C-PAS) having widespread use in the literature was conducted to compare the performances of the samplers. Sampling was carried out for 1-year period (February 2013-February 2014), in different sampling periods by employing D-PAS and C-PAS. D-PAS and C-PAS were run in parallel for 10, 20, 30, 40 and 60 days. Sampling rates were calculated for both PASs by the use of concentration values obtained from a high-volume air sampler (HVAS)...
June 9, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28575584/variability-in-inorganic-as-sb-and-tl-species-concentrations-in-waters-and-bottom-sediments-of-the-k%C3%A5-odnica-river-poland
#17
Rajmund Michalski, Sebastian Szopa
The study describes the application of new methodologies for the simultaneous determination of As(III)/As(V), Sb(III)/Sb(V) and Tl(I)/Tl(III) ions in waters and bottom sediments of the Kłodnica River (Poland) with the hyphenated technique of high-performance liquid chromatography-inductively coupled plasma-mass spectrometry (HPLC-ICP-MS) . Time and spatial correlations were determined in the changes of total and speciation concentrations of the above-mentioned analytes in Kłodnica river in 2012. The developed methodologies demonstrate high selectivity and limits of quantification at the level of 0...
June 2, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28575580/evaluation-of-the-process-performance-of-a-down-flow-hanging-sponge-reactor-for-direct-treatment-of-domestic-wastewater-in-bangkok-thailand
#18
Yuma Miyaoka, Wilasinee Yoochatchaval, Haruhiko Sumino, Pathan Banjongproo, Takashi Yamaguchi, Takashi Onodera, Tomohiro Okadera, Kazuaki Syutsubo
This study assesses the performance of an aerobic trickling filter, down-flow hanging sponge (DHS) reactor, as a decentralized domestic wastewater treatment technology. Also, the characteristic eukaryotic community structure in DHS reactor was investigated. Long-term operation of a DHS reactor for direct treatment of domestic wastewater (COD = 150-170 mg/L and BOD = 60-90 mg/L) was performed under the average ambient temperature ranged from 28°C to 31°C in Bangkok, Thailand. Throughout the evaluation period of 550 days, the DHS reactor at a hydraulic retention time of 3 h showed better performance than the existing oxidation ditch process in the removal of organic carbon (COD removal rate = 80-83% and BOD removal rate = 91%), nitrogen compounds (total nitrogen removal rate = 45-51% and NH4(+)-N removal rate = 95-98%), and low excess sludge production (0...
June 2, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28575579/determination-of-statin-drugs-in-hospital-effluent-with-dispersive-liquid-liquid-microextraction-and-quantification-by-liquid-chromatography
#19
Ayrton F Martins, Carla da S Frank, Joseline Altissimo, Júlia A de Oliveira, Daiane S da Silva, Jaqueline F Reichert, Darliana M Souza
Statins are classified as being amongst the most prescribed agents for treating hypercholesterolaemia and preventing vascular diseases. In this study, a rapid and effective liquid chromatography method, assisted by diode array detection, was designed and validated for the simultaneous quantification of atorvastatin (ATO) and simvastatin (SIM) in hospital effluent samples. The solid phase extraction (SPE) of the analytes was optimized regarding sorbent material and pH, and the dispersive liquid-liquid microextraction (DLLME), in terms of pH, ionic strength, type and volume of extractor/dispersor solvents...
June 2, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28541809/sequential-adaptation-of-nannochloropsis-gaditana-to-table-olive-processing-water
#20
Antonio Serrano, Carmen Contreras, Gonzalo Ruiz-Filippi, Rafael Borja, Fernando G Fermoso
The main objective of this study was to evaluate the suitability of Nannochloropsis gaditana to grow by sequential adaptation to TOPW (Table olive processing water) at increased substrate concentrations (10-80%). Sequential adaptation allows growing Nannochloropsis gaditana up to 80% TOPW, although the maximum microalgae biomass productions were achieved for percentages of 20-40%, i.e. 0.308 ± 0.005 g VSS (Volatile Suspended Solids)/L. In all growth experiments, proteins were the majority compound in the grown microalgae biomass (0...
May 25, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
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