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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/29985758/simple-and-practical-on-site-treatment-of-high-microcystin-levels-in-water-using-polypropylene-plastic
#1
Igor Mrdjen, Jiyoung Lee
Microcystin (MC) is a hepatotoxin produced by various cyanobacteria during harmful algal blooms (HAB's) in freshwater environments. Advanced treatment methods can remove MC from drinking water, but are costly and do not address recreational water exposure and ecosystem health concerns. Here we investigate the feasibility of utilizing plastics as a MC-adsorbing material, for use in water resources used for recreation, agriculture, aquaculture and drinking water. Water containing 20 µg/L MC-LR was exposed to polypropylene (PP) plastic for a six-day period at varying temperatures (22, 37, 65°C)...
July 9, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29985754/assessment-of-douro-and-ave-river-portugal-lower-basin-water-quality-focusing-on-physicochemical-and-trace-element-spatiotemporal-changes
#2
C M C M Couto, C Ribeiro, A Maia, M Santos, M E Tiritan, A R Ribeiro, E Pinto, A Almeida
Water quality of Douro and Ave lower basin was evaluated regarding physicochemical parameters (pH, conductivity, dissolved oxygen and temperature), nutrient compounds (nitrates, nitrites, ammonium and orthophosphates), chlorophyll a and occurrence of trace elements (Li, Be, Al, Ti, V, Cr, Co, Ni, Cu, Zn, Se, Mo, Ag, Cd, Sb, Ba, Tl, Pb, Th and U). To study spatiotemporal variations and possible anthropogenic sources, estuarine samples were collected at nine sampling sites in Douro and five in Ave distributed along the estuaries at four sampling campaigns (spring, summer, fall and winter)...
July 9, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29902118/polycyclic-aromatic-hydrocarbons-pahs-in-an-urban-river-at-mid-and-high-latitudes-a-case-study-in-siping-a-traditional-industrial-city-in-northeast-china
#3
Yidian Sun, Deming Dong, Liwen Zhang, Sinan He, Xiuyi Hua, Zhiyong Guo
The occurrence, spatial distribution, seasonal variation, sources, and ecological risks of polycyclic aromatic hydrocarbons (PAHs) in overlying water and surface sediments from Tiaozi River, which is an urban river running through the downtown of Siping City, a traditional industrial city of northeastern China, were investigated. The total PAH concentrations (ΣPAHs) in water varied from 473.5 to 2674.3 ng/L with a mean value of 1272.6 ng/L and ranged from 601.5 to 2906.3 ng/g with a mean value of 1534.4 ng/g in sediments...
June 14, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29869939/changes-in-the-fractionation-profile-of-al-ni-and-mo-during-bioleaching-of-spent-hydroprocessing-catalysts-with-acidithiobacillus-ferrooxidans
#4
Ashish Pathak, Mark G Healy, Liam Morrison
Spent hydroprocessing catalysts are known to contain a variety of potentially toxic metals and therefore studies on the bioavailability and mobility of these metals are critical for understanding the possible environmental risks of the spent catalysts. This study evaluates the different chemical fractions/forms of aluminium (Al), nickel (Ni), and molybdenum (Mo) in spent hydroprocessing catalyst and the changes they undergo during bioleaching with Acidithiobacillus ferrooxidans. In the spent catalyst (prior to bioleaching), Al was primarily present in its residual form, suggesting its low environmental mobility...
June 5, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29869928/silver-nanoparticles-decorated-eggshell-membrane-as-an-effective-platform-for-interference-free-sensing-of-dopamine
#5
Sudeshna Datta, Baishali Kanjilal, Priyabrata Sarkar
In this paper a simple electrochemical sensing of dopamine by a new effective immobilization of tyrosinase (Tyr) enzyme on eggshell membrane (ESM) along with silver nanoparticles (AgNPs) is reported. The modified membrane was characterized by scanning electron microscope (SEM), energy dispersive spectroscopy (EDAX), X-Ray diffraction (XRD). A simple solution based approach was used to prepare AgNPs on biomembrane followed by glutaraldehyde activation to immobilize Tyr on the nanoparticles decorated ESM. The direct electrochemistry of DA oxidation was performed through cyclic voltammetry (CV) and differential pulse voltammetry (DPV)...
June 5, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29869925/sorptive-equilibrium-profile-of-fluoride-onto-aluminum-olivine-fe-x-mg-1-x-2-sio-4-composite-aoc-physicochemical-insights-and-isotherm-modeling-by-non-linear-least-squares-regression-and-a-novel-neural-network-based-method
#6
Partha S Ghosal, Ashok K Gupta
A novel aluminum/olivine composite (AOC) was prepared by wet impregnation followed by calcination and was introduced as an efficient adsorbent for defluoridation. The adsorption of fluoride was modeled with one-, two- and three-parameter isotherm equations by non-linear regression to demonstrate the adsorption equilibrium. The FI was the best-fitted model among the two-parameter isotherms with a R2 value of 0.995. The three-parameter models were found to have better performance with low values of the error functions and high F values...
June 5, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29843557/preparation-of-carbon-nanofibers-tubes-using-waste-tyres-pyrolysis-oil-and-coal-fly-ash-derived-catalyst
#7
Khavharendwe M Rambau, Nicholas M Musyoka, Ncholu Manyala, Jianwei Ren, Henrietta W Langmi, Mkhulu K Mathe
In this study, two waste materials namely; coal fly ash (CFA) and waste tyres pyrolysis oil, were successfuly utilized in the synthesis of carbon nanofibers/tubes (CNF/Ts). In addition, Fe-rich CFA magnetic fraction (Mag-CFA) and ethylene gas were also used for comparison purposes. The carbons obtained from CFA were found to be anchored on the surface of the cenosphere and consisted of both CNTs and CNFs, whereas those obtained from Mag-CFA consisted of only multi-walled carbon nanotubes (MWCNTs). The study further showed that the type of carbon precursor and support material played an important role in determining the nanocarbon growth mechanism...
May 29, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29842847/removal-of-odorous-compounds-emitted-from-a-food-waste-composting-facility-in-korea-using-a-pilot-scale-scrubber
#8
Kris Niño G Valdehuesa, Grace M Nisola, Seong-Poong Lee, Alex V Anonas, Enkhdul Tuuguu, Melvin M Galera, Eulsaeng Cho, Wook-Jin Chung
Monitoring and control of odorous compound emissions have been enforced by the Korean government since 2005. One of the point sources for these emissions was from food waste composting facilities. In this study, a pilot-scale scrubber installed in a composting facility was evaluated for its performance in the removal of malodorous compounds. The exhaust stream contained ammonia and methylamine as the major odorants detected by the threshold odor test and various instrumental techniques (GC-FID, FPD, MS and HPLC/UV)...
May 29, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29842833/eco-friendly-approach-to-the-synthesis-of-silver-nanoparticles-and-their-antibacterial-activity-against-staphylococcus-spp-and-escherichia-coli
#9
Katarzyna A Wolny-Koładka, Dagmara K Malina
The aim of this study was to assess bactericidal properties of nanosilver obtained with ascorbic acid (vitamin C) as a reducing substance, against environmental strains of Gram-positive (Staphylococcus) and Gram-negative bacteria (Escherichia coli). Silver nanoparticles were obtained by a simple and fast method of chemical reduction in mild synthesis condition using substrates not classified as dangerous and commonly found in plants. Bacterial susceptibility to nanosilver was determined using the disk-diffusion method...
May 29, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29842823/rapid-identification-of-streptomyces-tetracycline-producers-by-maldi-tof-mass-spectrometry
#10
Lukas Hleba, Ivana Charousova, Miroslava Cisarova, Anton Kovacik, Jan Kormanec, Juraj Medo, Matej Bozik, Sona Javorekova
The main objective of this study was using matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) for assembling of DSM (German Collection of Microorganisms) Streptomyces spectral database and identification of wild Streptomyces cultures, which were clustered by MALDI-TOF Biotyper OC software as well as for teracycline detection by observing of obtained spectra using flexAnalysis software. Production of tetracycline was confirmed by thin-layer chromatography. Presence of tetracycline mass spectrum was verified by several tetracycline producers (Streptomyces aureofaciens LMG 5968, S...
May 29, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29775422/fate-of-four-phthalate-plasticizers-under-various-wastewater-treatment-processes
#11
Dana L Armstrong, Clifford P Rice, Mark Ramirez, Alba Torrents
The fate of four phthalate plasticizers during wastewater treatment processes at six different wastewater treatment plants (WWTPs) was investigated. Concentrations of benzyl butyl phthalate (BBP), di(2-ethylhexyl) phthalate (DEHP), diisononyl phthalate (DiNP), and diisodecyl phthalate (DiDP) were determined prior to either aerobic or anaerobic (conventional and advanced) treatment, after treatment, and in final, dewatered solids. Despite their elevated use worldwide, the fate of DiNP and DiDP during wastewater treatment have not been well characterized...
May 18, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29775400/evaluating-the-cytotoxicity-of-tin-dioxide-nanofibers
#12
Ashley S Reynolds, Tanya H Pierre, Rebecca McCall, Ji Wu, Worlanyo E Gato
Tin dioxide nanofibers (SnDNFs) are small fibers that have many applications. Tin dioxide nanofibers can be used in cosmetics, solar cells, toxic gas release sensors, and air pollution control. To date there have been few studies on the cytotoxicity of SnDNFs. The goal of this research is to determine if electrospun SnDNFs are toxic in a lung cancer cell line (A549). Considering the nano-scale size of the fibers, they can easily be inhaled and enter the pulmonary system and cause toxic effects in the lung. Occupational exposure to SnDNFs has been linked to pulmonary disease, making the A549 cell line important in this study...
May 18, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29775398/utilization-of-waste-tyres-pyrolysis-oil-vapour-in-the-synthesis-of-zeolite-templated-carbons-ztcs-for-hydrogen-storage-application
#13
Nicholas M Musyoka, Khavharendwe M Rambau, Ncholu Manyala, Jianwei Ren, Henrietta W Langmi, Mkhulu K Mathe
In this study, we investigated the potential for use of waste tyre pyrolysis oil vapour as a carbon precursor in the synthesis of zeolite templated carbons (ZTC). With Zeolite 13X as the template, the ZTCs were synthesised using two methods namely: 1-step process which involved the carbonization of gaseous carbon precursor in the zeolite template (in this case, ethylene and pyrolysis oil vapour) and the 2-step synthesis method involved the impregnation of zeolite pores with furfural alcohol prior to carbonization of the gaseous carbon precursor...
May 18, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29775396/the-importance-of-substrate-compaction-and-chemical-composition-in-the-phytoextraction-of-elements-by-pinus-sylvestris-l
#14
Mirosław Mleczek, Piotr Goliński, Bogusława Waliszewska, Andrzej Mocek, Monika Gąsecka, Magdalena Zborowska, Zuzanna Magdziak, Wojciech J Cichy, Bartłomiej Mazela, Tomisław Kozubik, Agnieszka Mocek-Płóciniak, Waldemar Moliński, Przemysław Niedzielski
Trees of Scots pine (Pinus sylvestris L.) are known for their effective phytoextraction capabilities. The results obtained in this study point to the significant role of substrate composition and chemical characteristics in the phytoextraction potential of this species. A multi-elemental (53 elements) analysis of pines from unpolluted (soil) and polluted (post-flotation tailings) sites was performed using inductively coupled plasma optical emission spectrometry. The analyzed flotation tailings were characterized by alkaline pH (7...
May 18, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29775394/degradation-of-ticarcillin-by-subcritical-water-oxidation-method-application-of-response-surface-methodology-and-artificial-neural-network-modeling
#15
Erdal Yabalak
This study was performed to investigate the mineralization of ticarcillin in the artificially prepared aqueous solution presenting ticarcillin contaminated waters, which constitute a serious problem for human health. 81.99% of total organic carbon removal, 79.65% of chemical oxygen demand removal, and 94.35% of ticarcillin removal were achieved by using eco-friendly, time-saving, powerful and easy-applying, subcritical water oxidation method in the presence of a safe-to-use oxidizing agent, hydrogen peroxide...
May 18, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29775126/efforts-to-remove-aqueous-lithium-ion-using-octolig%C3%A2-and-methylated-derivatives
#16
Dean F Martin, Kirpal S Bisht
Aqueous Li+ - containing samples (in DI water or well water) were eluted over Octolig®, a polyethylenediimine covalently attached to a high- surface-area silica gel, and only slight removal, if any, could be claimed. However, when using tetrahydrofuran (THF) as a solvent we quantitatively removed lithium ion with Octolig® or with alkylated Octolig®, demonstrating the efficacy of Octolig® and lack of advantage of a N, N'-dialkylated Octolig®. In addition, the removal of alkali metal ions (lithium, sodium, and potassium) in THF by Octolig® was partially selective: While being quantitative for lithium it was only about 40% for potassium...
May 18, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29775125/influence-of-tetramethylammonium-hydroxide-tmah-on-the-microbial-properties-of-anaerobic-granular-sludge-acclimated-to-isoplophyl-alcohol-ipa-wastewater-under-psychrophilic-conditions
#17
Tsuyoshi Danshita, Yuma Miyaoka, Norihisa Matsuura, Haruhiko Sumino, Takashi Yamaguchi, Kazuaki Syutsubo
In this study, a continuous flow experiment was conducted in which a lab-scale upflow anaerobic sludge blanket (UASB) reactor at psychrophilic conditions (18-19°C) was fed with artificial wastewater, containing tetramethylammonium hydroxide (TMAH) and isoplophyl alcohol (IPA), from the electronics industry. This was done to evaluate process performance and microbial properties of the granular sludge that was retained in the reactor. The inoculated granular sludge was precultured with IPA containing wastewater but not TMAH; as a result, no degradation was observed in 30 days of operation...
May 18, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29775124/metal-leaching-from-refinery-waste-hydroprocessing-catalyst
#18
Meena Marafi, Mohan S Rana
The present study aims to develop an eco-friendly methodology for the recovery of nickel (Ni), molybdenum (Mo), and vanadium (V) from the refinery waste spent hydroprocessing catalyst. The proposed process has two stages: the first stage is to separate alumina, while the second stage involves the separation of metal compounds. The effectiveness of leaching agents, such as NH4 OH, (NH4 )2 CO3 , and (NH4 )2 S2 O8 , for the extraction of Mo, V, Ni, and Al from the refinery spent catalyst has been reported as a function of reagent concentration (0...
May 18, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29764288/occurrence-of-parent-and-substituted-polycyclic-aromatic-hydrocarbons-in-typical-wastewater-treatment-plants-and-effluent-receiving-rivers-of-beijing-and-risk-assessment
#19
Wei Cao, Meng Qiao, Bochuan Liu, Xu Zhao
Sixteen polycyclic aromatic hydrocarbons (PAHs) and some typical substituted polycyclic aromatic hydrocarbons (SPAHs) were investigated in wastewater treatment plants (WWTPs) and effluent effluent-receiving rivers in order to indentify the elimination of these compounds in WWTPs, as well as the potantial potential risk in the effluent-receiving rivers. The concentrations of ΣPAHs in the total phase (combined dissolved and adsorbed phases) in influent were between 944.1 and 1246.5 ng·L-1 , and ΣSPAHs, including methyl PAHs (MPAHs) and oxygenated PAHs (OPAHs), between 684...
May 15, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29764286/environmental-evaluation-of-flocculation-efficiency-in-the-separation-of-the-microalgal-biomass-of-scenedesmus-sp-cultivated-in-full-scale-photobioreactors
#20
Marisa D Scherer, Fernando J C Magalhães Filho, Amanda C Oliveira, Nelson F H Selesu, Cássia M L Ugaya, André B Mariano, José V C Vargas
In this paper the environmental evaluation of the separation process of the microalgal biomass Scenedesmus sp. from full-scale photobioreactors was carried out at the Research and Development Nucleus for Sustainable Energy (NPDEAS), with different flocculants (iron sulfate - FeCl3 , sodium hydroxide - NaOH, calcium hydroxide - Ca(OH)2 and aluminum sulphate Al2 (SO4 )3 , by means of the life cycle assessment (LCA) methodology, using the SimaPro 7.3 software. Furthermore, the flocculation efficiency by means of optical density (OD) was also evaluated...
May 15, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
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