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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/28494219/oxidative-degradation-of-tetramethylammonium-hydroxide-tmah-by-uv-persulfate-and-associated-acute-toxicity-assessment
#1
Jingting Huang, Kai-Sung Wang, Chenju Liang
Tetramethylammonium hydroxide (TMAH) is widely used in high-tech industries as a developing agent. Ultraviolet (UV) light-activated persulfate (PS, S2O8(2-)) can be used to generate strongly oxidative sulfate radicals, and it also exhibits the potential to treat TMAH-containing wastewater. This study initially investigated the effect of S2O8(2-) concentration and UV strength on the UV/S2O8(2-) process for the degradation of TMAH in a batch reactor. The results suggested that 15 watts (W) of UV-activated S2O8(2-) at concentrations of 10 or 50 mM resulted in pseudo-first-order TMAH degradation rate constants of 3...
May 11, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28489975/biodegradation-of-airborne-acetone-styrene-mixtures-in-a-bubble-column-reactor
#2
T Vanek, A Silva, M Halecky, J Paca, I Ruzickova, E Kozliak, K Jones
The ability of a bubble column reactor (BCR) to biodegrade a mixture of styrene and acetone vapors was evaluated to determine the factors limiting the process efficiency, with a particular emphasis on the presence of degradation intermediates and oxygen levels. The results obtained under varied loadings and ratios were matched with the dissolved oxygen levels and kinetics of oxygen mass transfer, which was assessed by determination of kLa coefficients. A 1.5-L laboratory-scale BCR was operated under a constant air flow of 1...
May 10, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28489973/selected-aspects-of-the-current-state-of-freshwater-resources-in-the-murmansk-region-russia
#3
Nikolay A Kashulin, Vladimir A Dauvalter, Dmitry B Denisov, Svetlana A Valkova, Oksana I Vandysh, Petr M Terentjev, Alexander N Kashulin
Aspects of reducing the resource potential of surface waters of the Murmansk region in the global climate change and the environment and their irrational use have been considered. Increase of aquatic environment toxicity, drastic restructuring of the structural and functional characteristics of aquatic communities, changes in trophic status of lakes, reducing the stability of freshwater ecosystems, increasing the risk of catastrophic degradation have been shown. Taking into account the regional peculiarities, some indicators of surface water quality in the Murmansk region have been proposed...
May 10, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28489972/continuous-bioelectricity-generation-through-treatment-of-victoria-blue-r-a-novel-microbial-fuel-cell-operation
#4
Chih-Yu Chen, Guey-Horng Wang, Teh-Hua Tsai, Wan-Tzu Chen, Ying-Chien Chung
A novel two-chamber microbial fuel cell (MFC) operation with a continuous anaerobic-aerobic decolorization system was developed to improve the degradation of the triphenylmethane dye, Victoria blue R (VBR). In addition, bioelectricity was generated during the VBR degradation process, and the operation parameters were optimized. The results indicated that the VBR removal efficiency and electricity generation were affected by the VBR concentration, liquid retention time (LRT), external resistance, gas retention time (GRT), and shock loading...
May 10, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28471297/effects-of-electric-potential-nacl-ph-and-distance-between-electrodes-on-efficiency-of-electrolysis-in-landfill-leachate-treatment
#5
Iqbal K Erabee, Amimul Ahsan, Bipin Jose, T Arunkumar, R Sathyamurthy, Syazwani Idrus, N N Nik Daud
This study investigated the effects of different parameters on the removal efficiencies of organic and inorganic pollutants in landfill leachate treatment by electrolysis. Different parameters were considered such as the electric potential (e.g., 24, 40 and 60 V), hydraulic retention time (HRT) (e.g., 40, 60, 80, 100 and 120 min), sodium chloride (NaCl) concentration (e.g., 1, 3, 5 and 7%), pH (e.g., 3, 7 and 9), electrodes materials [e.g., aluminum (Al) and iron (Fe)] and distance between electrodes (e.g...
May 4, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28463586/physical-chemical-modeling-of-elements-behavior-in-mixing-sea-and-fresh-waters-of-minor-rivers-in-the-white-sea-catchment-area
#6
Victoria V Maksimova, Svetlana I Mazukhina, Tatiana A Cherepanova, Tamara T Gorbacheva
The physical-chemical stage of marginal filters in minor rivers of the White Sea catchment area by the example of the Umba River, flowing to Kandalaksha Gulf, has been explored. Application of the method of physical-chemical modeling on the basis of field data allowed establishing migration forms of a number of elements in the "river-sea" system and deposition of solid phases when mixing waters. The mixing of river and sea water is accompanied by the sedimentation of predominantly goethite, hydromuscovite, and hydroxylapatite...
May 2, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28463583/decolorization-of-acid-disperse-and-reactive-dyes-by-trametes-versicolor-cbr43
#7
Seung-Ok Yang, Hong Sodaneath, Jung-In Lee, Hyekyeng Jung, Jin-Hee Choi, Hee Wook Ryu, Kyung-Suk Cho
The mycoremediation has been considered as a promising method for decolorizing dye wastewater. To explore new bioresource for mycoremediation, a new white-rot fungus that could decolorize various dyes commonly used in textile industries was isolated, and its ligninolytic enzyme activity and decolorization capacity were characterized. The isolated CBR43 was identified as Trametes versicolor based on the morphological properties of its fruit body and spores, as well as through partial 18S rDNA gene sequences...
May 2, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28463567/phylogeny-and-polycyclic-aromatic-hydrocarbons-degradation-potential-of-bacteria-isolated-from-crude-oil-contaminated-site
#8
David Tirado-Torres, Otilio Acevedo-Sandoval, Blanca R Rodríguez-Pastrana, Martha Gayosso-Canales
This study employed the use of 16S rRNA gene sequence analysis to identify three of four native bacterial strains isolated from crude oil-contaminated site in Poza Rica, Veracruz, Mexico. The identified bacteria were Ochrobactrum intermedium, Pandoraea pnomenusa and Ochrobactrum sp., but SA2-09 strain was not identified. The ability of the isolates to degrade polycyclic aromatic hydrocarbons (PAHs) was evaluated at 31.61 and 54.52 mg/kg PAHs in soil, when used as crude oil in soil microcosm during 80 days of incubation at 30°C...
May 2, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28463536/effect-of-competitive-adsorption-on-zinc-removal-from-aqueous-solution-and-zinc-smelting-effluent-by-eucalyptus-leaf-based-magnetic-biosorbent
#9
Cheng Chen, Yankui Tang, Yuyang Liu, Yuanzhang Liang, Kaixuan Zhang, Shengye Wang, Yan Liang
The objectives of this study were to investigate the competitive sorption behaviors and mechanisms of heavy metals onto ELMB, a novel eucalyptus-leaf-based magnetic biosorbent, and to study the potential application of ELMB in the treatment of actual zinc smelting effluent after a necessary pretreatment process. ELMB and ELMB-metals systems were characterized using several techniques. Competitive sorption of Zn(2+) with Pb(2+), Cu(2+) and Cd(2+) onto ELMB was studied by batch experiments and the used sorbent was separated under a magnetic field...
May 2, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28448788/production-of-biogas-from-co-digestion-of-livestock-and-agricultural-residues-a-case-study
#10
Brahim Arhoun, Cesar Gomez-Lahoz, Roberto Teofilo Abdala-Diaz, Jose Miguel Rodriguez-Maroto, Francisco Garcia-Herruzo, Carlos Vereda-Alonso
This study was undertaken to determine the possible changes in the digester yield and performance for the anaerobic co-digestion under mesophilic conditions of strawberry residues (SRs) together with pig manure (PM). The first part of this paper deals with the digestion of SR as a single substrate. For organic loading rates (OLRs) of 4.4 (g L(-1) d(-1)) or less, the experimental specific biogas and methane productions are 0.588 and 0.231 L g(-1), respectively. When higher OLRs (5.5 g L(-1) d(-1)) are used the digester fails due to acidification...
April 27, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28448768/toxicity-identification-and-evaluation-tie-of-a-petroleum-refinery-wastewater
#11
Sarah D A Daflon, Igor L Guerra, Márcia V Reynier, Ana C Cerqueira, Clarice R Botta, Juacyara C Campos
Petroleum refineries generate large amounts of wastewaters, which can have acute/chronic toxicity toward aquatic organisms. Previous studies have shown that many contaminants can be responsible for this toxicity, among them ammonia, sulfide, cyanide, phenols and hydrocarbons. In the study reported herein, the cause of the chronic toxicity of a biotreated petroleum refinery wastewater was investigated by applying the TIE methodology using the microcrustacean Ceriodaphnia dubia. Five samples were analyzed, and the results suggest that copper is the primary toxicant, showing a strong correlation with wastewater toxicity in Phase III...
April 27, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28448750/simultaneous-atrazine-degradation-and-e-coli-inactivation-by-simulated-solar-photo-fenton-like-process-using-persulfate
#12
Natalya Garkusheva, Galina Matafonova, Irina Tsenter, Sara Beck, Valeriy Batoev, Karl Linden
This work evaluated the feasibility of a photo-Fenton-like process using persulfate (PS) and ferrous iron (Fe(2+)) under simulated solar radiation for degrading the herbicide atrazine (ATZ, 6-Chloro-N-ethyl-N'-isopropyl-1,3,5-triazine-2,4-diamine) and inactivating E. coli. Milli Q water, lake water, and diluted wastewater effluents were spiked both simultaneously and separately with ATZ (4 mg/L) and E. coli (10(5) CFU/mL), and exposed to treatment. A method for determining the average irradiance throughout the water media in the UV(A+B) range of the Xe lamp emission was developed for bench-scale experiments...
April 27, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28448749/testing-and-application-of-simple-semi-analytical-models-for-soil-temperature-estimation-and-prediction-in-environmental-assessments
#13
Ioannis X Tsiros, Fotoula Droulia, Eleni Thoma, Basil Psiloglou
The ability of various semi-analytical models to predict soil temperature profiles in an experimental plot during a 16-year monitoring study for soil depths up to 120 cm is evaluated. The models are developed from an analytical model by replacing the steady-state soil temperature with easily obtained hourly and daily average temperature values. Such values include the hourly air temperature, the daily average air temperature, the hourly soil temperature of selected soil depths from three daily observations, the daily average of the soil temperature profile and the hourly soil temperature for the bottom depth...
April 27, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28448748/evaluation-of-humic-substances-removal-from-leachates-originating-from-solid-waste-landfills-in-rio-de-janeiro-state-brazil
#14
Letícia S M S Lima, Ronei De Almeida, Bianca R Quintaes, Daniele M Bila, Juacyara C Campos
This study aimed to evaluate the use of coagulation/flocculation and Fenton processes for the removal of the recalcitrant component, in particular humic substances, from two different leachates generated in the Gericinó and Gramacho landfills in Rio de Janeiro State (Brazil). A coagulation/flocculation process, using FeCl3·6H2O as the coagulant, was applied to the two leachate samples. In the case of the leachate from Gericinó landfill, the treatment removed 93% of color, 71% of TOC, 69% of COD, 76% of HS, 73% of humic acids (HA) and 82% of fulvic acids (FA)...
April 27, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28448746/pharmaceutical-chemicals-steroids-and-xenoestrogens-in-water-sediments-and-fish-from-the-tidal-freshwater-potomac-river-virginia-usa
#15
Golala Arya, Sara Tadayon, James Sadighian, Jennifer Jones, Kim de Mutsert, Thomas B Huff, Gregory D Foster
Selected pharmaceutical chemicals, steroids and xenoestrogens (PCSXs) consisting of 29 endocrine modulators, therapeutic drugs, pesticides, detergents, plastics, and active ingredients in household products were measured in water, riverbed sediments and fish collected in a tributary embayment of the Potomac River (Hunting Creek, Alexandria, VA, USA) in the vicinity of wastewater discharge. A total of 17 PCSXs were found in the Hunting Creek samples, with steroid hormones (e.g., progesterone and 17α-ethinylestradiol), triclosan, dextromethorphan and bisphenol A being the most prominent micropollutants detected...
April 27, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28394738/kinetic-and-isotherm-studies-of-bisphenol-a-adsorption-onto-orange-albedo-citrus-sinensis-sorption-mechanisms-based-on-the-main-albedo-components-vitamin-c-flavones-glycosides-and-carotenoids
#16
Theophile Kamgaing, Giscard Doungmo, Francis Merlin Melataguia Tchieno, Jimmy Julio Gouoko Kouonang, Ketcha Joseph Mbadcam
Orange albedo and its adsorption capacity towards bisphenol A (BPA) were studied. Adsorption experiments were conducted in batch mode at 25-55°C. Scanning electron microscopy (SEM), Energy dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) and Fourier transform infrared (FTIR) spectroscopy were used to characterise the biosorbent. The effects of various parameters including adsorption time, equilibrium pH, adsorbent dosage and initial adsorbate concentration were investigated...
April 10, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28394702/removal-of-phenanthrene-in-aqueous-solution-containing-photon-competitors-by-tio2-c-ag-film-supported-on-fiberglass
#17
Denisse Fabiola González-Ramírez, Pedro Ávila-Pérez, Luis G Torres-Bustillos, Ricardo Aguilar-López, María C Montes-Horcasitas, Fernando J Esparza-García, Refugio Rodríguez-Vázquez
Surface interactions with pollutants and photons are key factors that affect the applications of TiO2 in environmental remediation. In this study, the solubilizing agents dimethylsulfoxide and polyoxyethylene sorbitan monooleate, which act as photon competitors, had no effect on the photocatalytic activity of TiO2-C-Ag film in phenanthrene (PHE) removal. Fiberglass with TiO2-C-Ag coating removed 91.1 ± 5.2 and 99.7 ± 0.4% of PHE in treatments using UVA (365-465 nm) and UVC (254 nm) irradiation, respectively...
April 10, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28394701/nitrogen-removal-and-its-relationship-with-the-nitrogen-cycle-genes-and-microorganisms-in-the-horizontal-subsurface-flow-constructed-wetlands-with-different-design-parameters
#18
Jun Chen, Guang-Guo Ying, You-Sheng Liu, Xiao-Dong Wei, Shuang-Shuang Liu, Liang-Ying He, Yong-Qiang Yang, Fan-Rong Chen
This study aims to investigate nitrogen removal and its relationship with the nitrogen-cycle genes and microorganisms in the horizontal subsurface flow constructed wetlands (CWs) with different design parameters. Twelve mesocosm-scale CWs with four substrates and three hydraulic loading rates were set up in the outdoor. The result showed the CWs with zeolite as substrate and HLR of 20 cm/d were selected as the best choice for the TN and NH3-N removal. It was found that the single-stage mesocosm-scale CWs were incapable to achieve high removals of TN and NH3-N due to inefficient nitrification process in the systems...
April 10, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28394695/variations-in-the-composition-of-house-dust-by-particle-size
#19
Christof Lanzerstorfer
In this study, the distribution of heavy metals and other components in the various size fractions of house dust is investigated. A house dust sample collected from a vacuum cleaner was separated into size fractions by sieving and air classification. The analysis of the size fractions showed that the heavy metals and other components are not uniformly distributed in the various size fractions. The highest total carbon concentrations were found in the size fractions with a mass median diameter of 18-95 µm, while in the coarser size fractions and in the finest size fraction, the total carbon concentration was lower...
April 10, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28368778/monitoring-the-fate-and-behavior-of-tio2-nanoparticles-simulated-in-a-wwtp-with-industrial-dye-stuff-effluent-according-to-oecd-303a
#20
Lwazi C Mahlalela, Jane C Ngila, Langelihle N Dlamini
The use of nanoparticles (NPs) in several consumer products has led to them finding their way into wastewater treatment plants (WWTPs). Some of these NPs have photocatalytic properties, thus providing a possible solution to textile industries to photodegrade dyes from their wastewater. Thus, the interaction of NPs with industrial dye effluents is inevitable. The Organization for Economic Co-operation and development (OECD) guideline for testing of chemical 303A was employed to study the fate and behaviour of TiO2 NPs in industrial dye-stuff effluent...
April 3, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
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