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https://www.readbyqxmd.com/read/28107756/photocatalytic-reduction-of-cs-i-ions-removed-by-combined-maghemite-titania-pva-alginate-beads-from-aqueous-solution
#1
Zohreh Majidnia, Mohamad Ali Fulazzaky
The presence of Cs(I) ions in nuclear wastewater becomes an important issue for the reason of its high toxicity. The development of adsorbent embedded metal-based catalysts that has sufficient adsorption capacity is expected for the removal of Cs(I) ions from contaminated water. This study tested the use of maghemite, titania and combined maghemite-titania polyvinyl alcohol (PVA)-alginate beads as an adsorbent to remove Cs(I) ions from aqueous solution with the variables of pH and initial concentration using batch experiments under sunlight...
January 17, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28107748/tracing-the-sources-and-cycling-of-phosphorus-in-river-sediments-using-oxygen-isotopes-methodological-adaptations-and-first-results-from-a-case-study-in-france
#2
Chiara Pistocchi, Federica Tamburini, Gerard Gruau, André Ferhi, Dominique Trevisan, Jean-Marcel Dorioz
An essential aspect of eutrophication studies is to trace the ultimate origin of phosphate ions (P-PO4) associated with the solid phase of river sediments, as certain processes can make these ions available for algae. However, this is not a straightforward task because of the diversity of allochthonous and autochthonous sources that can supply P-PO4 to river sediments as well as the existence of in-stream processes that can change the speciation of these inputs and obscure the original sources. Here, we present the results of a study designed to explore the potentials, limitations and conditions for the use of the oxygen isotope composition of phosphate (δ(18)Op) extracted from river sediments for this type of tracing...
December 26, 2016: Water Research
https://www.readbyqxmd.com/read/28107747/diversity-of-dna-viruses-in-effluents-of-membrane-bioreactors-in-traverse-city-mi-usa-and-la-grande-motte-france
#3
Evan O'Brien, Mariya Munir, Terence Marsh, Marc Heran, Geoffroy Lesage, Volodymyr V Tarabara, Irene Xagoraraki
This study assesses diversity of DNA viruses in the effluents of two membrane bioreactor (MBR) wastewater treatment plants (WWTPs): an MBR in the United States and an MBR in France. Viral diversity of these effluents is compared to that of a conventional activated sludge WWTP in the U.S. Diversity analysis indicates Herpesvirales to be the most abundant order of potentially pathogenic human DNA viruses in wastewater treated effluent in all utilities. Other potentially pathogenic human viruses detected include Adenoviridae, Parvoviridae, and Polyomaviridae...
January 8, 2017: Water Research
https://www.readbyqxmd.com/read/28107720/enhanced-treatment-performance-of-coking-wastewater-and-reduced-membrane-fouling-using-a-novel-embr
#4
Bei Jiang, Cong Du, Shengnan Shi, Liang Tan, Meidi Li, Jiaxin Liu, Lanlan Xue, Xiangyu Ji
A novel EMBR (electric field applied in MBR) by placing stainless steel mesh cathode inside a flat membrane module and stainless steel mesh anode outside the module was built and operated to enhance the treatment performance of coking wastewater containing phenol, pyridine and quinoline and reduce the membrane fouling. The degradation rates of COD, phenol, pyridine and quinoline in EMBR with electric field (reactor A) were significantly higher than the sum of EMBR without electric field (reactor B) and only electro-catalytic degradation during the long-term treatment, confirming that a coupling effect was existed between biodegradation and electro-catalytic degradation process...
January 4, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28106814/genome-analysis-of-a-novel-broad-host-range-proteobacteria-phage-isolated-from-a-bioreactor-treating-industrial-wastewater
#5
Marina de Leeuw, Maayan Baron, Asher Brenner, Ariel Kushmaro
Bacteriophages are viruses that infect bacteria, and consequently they have a major impact on the development of a microbial population. In this study, the genome of a novel broad host range bacteriophage, Aquamicrobium phage P14, isolated from a wastewater treatment plant, was analyzed. The Aquamicrobium phage P14 was found to infect members of different Proteobacteria classes (Alphaproteobacteria and Betaproteobacteria). This phage contains a 40,551 bp long genome and 60% of its genes had blastx hits. Furthermore, the bacteriophage was found to share more than 50% of its genes with several podoviruses and has the same gene order as other polyvalent bacteriophages...
January 18, 2017: Genes
https://www.readbyqxmd.com/read/28106290/returning-to-normal-assessing-transcriptome-recovery-over-time-in-male-rainbow-darter-etheostoma-caeruleum-liver-in-response-to-wastewater-treatment-plant-upgrades
#6
Patricija Marjan, Christopher J Martyniuk, Meghan L M Fuzzen, Deborah L MacLatchy, Mark E McMaster, Mark R Servos
The present study measured hepatic transcriptome responses in male rainbow darter (Etheostoma caeruleum) exposed to 2 municipal wastewater treatment plants (MWWTPs) (Kitchener and Waterloo) over 4 fall seasons (2011 - 2014) in the Grand River Ontario. The overall goal was to determine if upgrades at the Kitchener MWWTP (in 2012) resulted in transcriptome responses indicative of improved effluent quality. The number of differentially expressed probes in fish downstream of the Kitchener outfall (904-1,223), remained comparable to that downstream of Waterloo (767-3,867)...
January 20, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28105684/bacterial-microcompartment-directed-polyphosphate-kinase-promotes-stable-polyphosphate-accumulation-in-e-coli
#7
Mingzhi Liang, Stefanie Frank, Heinrich Lünsdorf, Martin J Warren, Michael B Prentice
Processes for the biological removal of phosphate from wastewater rely on temporary manipulation of bacterial polyphosphate levels by phased environmental stimuli. In E. coli polyphosphate levels are controlled via the polyphosphate-synthesizing enzyme polyphosphate kinase (PPK1) and exopolyphosphatases (PPX and GPPA), and are temporarily enhanced by PPK1 overexpression and reduced by PPX overexpression. We hypothesised that partitioning PPK1 from cytoplasmic exopolyphosphatases would increase and stabilise E...
January 20, 2017: Biotechnology Journal
https://www.readbyqxmd.com/read/28105595/bioelectrochemical-anaerobic-sewage-treatment-technology-for-arctic-communities
#8
Boris Tartakovsky, Yehuda Kleiner, Michelle-France Manuel
This study describes a novel wastewater treatment technology suitable for small remote northern communities. The technology is based on an enhanced biodegradation of organic carbon through a combination of anaerobic methanogenic and microbial electrochemical (bioelectrochemical) degradation processes leading to biomethane production. The microbial electrochemical degradation is achieved in a membraneless flow-through bioanode-biocathode setup operating at an applied voltage below the water electrolysis threshold...
January 20, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28105594/screening-of-inorganic-and-organic-contaminants-in-floodwater-in-paddy-fields-of-hue-and-thanh-hoa-in-vietnam
#9
Ha Thu Trinh, Helle Marcussen, Hans Christian B Hansen, Giang Truong Le, Hanh Thi Duong, Nguyen Thuy Ta, Trung Quang Nguyen, Soren Hansen, Bjarne W Strobel
In the rainy season, rice growing areas in Vietnam often become flooded by up to 1.5 m water. The floodwater brings contaminants from cultivated areas, farms and villages to the rice fields resulting in widespread contamination. In 2012 and 2013, the inorganic and organic contaminants in floodwater was investigated in Thanh Hoa and Hue. Water samples were taken at 16 locations in canals, paddy fields and rivers before and during the flood. In total, 940 organic micro-pollutants in the water samples were determined simultaneously by GC-MS method with automatic identification and quantification system (AIQS), while ICP-MS was used for determination of ten trace elements in the samples...
January 20, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28104659/complete-genome-sequence-of-the-triclosan-and-multidrug-resistant-pseudomonas-aeruginosa-strain-b10w-isolated-from-municipal-wastewater
#10
Chuanqing Zhong, Matthew Nelson, Guangxiang Cao, Michael J Sadowsky, Tao Yan
Here, we report the complete genome sequence of the triclosan- and multidrug-resistant Pseudomonas aeruginosa strain B10W, obtained from municipal wastewater in Hawaii. The bacterium has a 6.7-Mb genome, contains 6,391 coding sequences and 78 RNAs, with an average G+C content of 66.2 mol%.
January 19, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28104552/a-novel-salt-tolerant-bacterial-consortium-for-biodegradation-of-saline-and-recalcitrant-petrochemical-wastewater
#11
Mehdi Ahmadi, Sahand Jorfi, Raheleh Kujlu, Shokouh Ghafari, Reza Darvishi Cheshmeh Soltani, Nematollah Jaafarzadeh Haghighifard
Treatment of a saline petrochemical wastewater with BOD5/COD ratio of less than 0.1 was investigated using a consortium consisted of three isolated salt-tolerant bacteria namely, Kocuria turfanesis, Halomonas alkaliphila and Pseudomonas balearica. Selected bacteria were isolated from petrochemical wastewater containing mineral salt mediums of 3% salinity. A lab-scale activated sludge bioreactor was used for startup in batch mode operation and after obtaining the MLSS concentration of about 3000 mg/L, the operation was changed to continuous flow mode to determine the biokinetic coefficients under different organic loading rates of 0...
January 16, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28104519/load-ratio-determines-the-ammonia-recovery-and-energy-input-of-an-electrochemical-system
#12
Mariana Rodríguez Arredondo, Philipp Kuntke, Annemiek Ter Heijne, Hubertus V M Hamelers, Cees J N Buisman
Complete removal and recovery of total ammonia nitrogen (TAN) from wastewaters in (bio)electrochemical systems has proven to be a challenge. The system performance depends on several factors, such as current density, TAN loading rate and pH. The interdependence among these factors is not well understood yet: insight is needed to achieve maximum ammonium recovery at minimal energy input. The aim of this study was to investigate the influence of current density and TAN loading rate on the recovery efficiency and energy input of an electrochemical cell (EC)...
December 31, 2016: Water Research
https://www.readbyqxmd.com/read/28104517/from-the-conventional-biological-wastewater-treatment-to-hybrid-processes-the-evaluation-of-organic-micropollutant-removal-a-review
#13
REVIEW
Camille Grandclément, Isabelle Seyssiecq, Anne Piram, Pascal Wong-Wah-Chung, Guillaume Vanot, Nicolas Tiliacos, Nicolas Roche, Pierre Doumenq
Because of the recalcitrance of some micropollutants to conventional wastewater treatment systems, the occurrence of organic micropollutants in water has become a worldwide issue, and an increasing environmental concern. Their biodegradation during wastewater treatments could be an interesting and low cost alternative to conventional physical and chemical processes. This paper provides a review of the organic micropollutants removal efficiency from wastewaters. It analyses different biological processes, from conventional ones, to new hybrid ones...
January 6, 2017: Water Research
https://www.readbyqxmd.com/read/28104515/biomass-density-function-relationships-in-suspended-growth-biological-processes-a-critical-review
#14
REVIEW
Lin Li, Krishna R Pagilla
Good settling performance in suspended growth biomass systems, for example in activated sludge (AS) process, leads to efficient wastewater and sludge treatment. Factors that cause the differences in settleablility of AS include the morphology of bacteria, microbial community structure, and the density of bacteria and flocs. Density of AS at three levels, namely, cell, floc, and process, have been discussed here to explain the variations in AS settleability. Dense materials, inside or outside the cell, significantly increase density of AS bacteria or flocs...
January 9, 2017: Water Research
https://www.readbyqxmd.com/read/28104333/response-of-lemna-gibba-l-to-high-and-environmentally-relevant-concentrations-of-ibuprofen-removal-metabolism-and-morpho-physiological-traits-for-biomonitoring-of-emerging-contaminants
#15
D Di Baccio, F Pietrini, P Bertolotto, S Pérez, D Barcelò, M Zacchini, E Donati
The increasing worldwide consumption of pharmaceuticals and personal care products such as ibuprofen (IBU) is leading to the widespread and persistent occurrence of these chemicals and their transformation products in soils and waters. Although at low concentrations, the continuous discharge of these micropollutants and the incomplete removal by the actual wastewater treatments can provoke accumulation in the environment with risks for the trophic chain. Non-target organisms as duckweed can be used for the environmental monitoring of pharmaceutical emerging contaminants...
January 16, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28104329/comparative-evaluation-of-four-biosolids-formulations-on-the-effects-of-triclosan-on-plant-arbuscular-mycorrhizal-fungal-interactions-in-three-crop-species
#16
René S Shahmohamadloo, Linda Lissemore, Ryan S Prosser, Paul K Sibley
Triclosan (TCS) is an antimicrobial ingredient found in personal care products that include soaps, shampoos, and other sanitation goods. TCS is moderately hydrophobic and has been shown to be resistant to wastewater treatment and thus accumulates in biosolids. Biosolids are commonly applied to agricultural land but little is known about the risk that TCS in biosolids poses to soil fungal communities following land application. The purpose of this study was to characterize the effects of TCS on the symbiotic colonization of roots in three field crops (soybean, corn, and spring wheat) by arbuscular mycorrhizal fungi (AMF) in soils amended with four different types of biosolids (liquid, dewatered, composted, alkaline and hydrolyzed)...
January 16, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28104328/isotopic-constraints-on-water-source-mixing-network-leakage-and-contamination-in-an-urban-groundwater-system
#17
F Grimmeisen, M F Lehmann, T Liesch, N Goeppert, J Klinger, J Zopfi, N Goldscheider
Water supply in developing countries is prone to large water losses due to leaky distribution networks and defective sewers, which may affect groundwater quality and quantity in urban areas and result in complex subsurface mixing dynamics. In this study, a multi-stable isotope approach was used to investigate spatiotemporal fluctuations of surface and sub-surface water source partitioning and mixing, and to assess nitrogen (N) contamination in the urban water cycle of As-Salt, Jordan. Water import from the King Abdullah Canal (KAC), mains waters from the network, and wastewater are characterized by distinct isotopic signatures, which allowed us to quantify city effluents into the groundwater...
January 16, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28103741/study-on-degrading-graphene-oxide-in-wastewater-under-different-conditions-for-developing-an-efficient-and-economical-degradation-method
#18
Ting Li, Chao-Zhi Zhang, Chengyue Gu
With popular application of graphene and graphene oxide (GO), they have been discharged into water. Graphene and GO would harm organisms. However, an efficient and economical method for removing graphene and GO in wastewater has seldom been reported. Graphene can be oxidized by hydrogen peroxide to give GO, therefore, degradation of graphene oxide is an important step in procedure of removal of graphene from water. In this paper, GO degradation via photo-Fenton reaction under different conditions was carried out...
January 19, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28103667/national-estimate-of-per-and-polyfluoroalkyl-substance-pfas-release-to-u-s-municipal-landfill-leachate
#19
Johnsie R Lang, Brent McKay Allred, Jennifer A Field, James William Levis, Morton A Barlaz
Landfills are the final stage in the life cycle of many products containing per- and polyfluoroalkyl substances (PFASs) and their presence has been reported in landfill leachate. The concentrations of 70 PFASs in 95 samples of leachate were measured in a survey of U.S. landfills of varying climates and waste ages. National release of PFASs was estimated by coupling measured concentrations for the 19 PFASs where more than 50% of samples had quantifiable concentrations, with climate-specific estimates of annual leachate volumes...
January 20, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28103491/chemically-activated-carbon-from-lignocellulosic-wastes-for-heavy-metal-wastewater-remediation-effect-of-activation-conditions
#20
Arunima Nayak, Brij Bhushan, Vartika Gupta, P Sharma
Chemical activation is known to induce specific surface features of porosity and functionality which play a definite role in enhancing the adsorptive potential of the developed activated carbons. Different conditions of temperature, time, reagent type and impregnation ratio were applied on sawdust precursor and their effect on the physical, surface chemical features and finally on the adsorption potential of the developed activated carbons were analysed. Under activation conditions of 600°C, 1hr, 1:0.5 ratio, ZnCl2 impregnated carbon (CASD_ZnCl2) resulted in microporosity while KOH impregnation (CASD_KOH) yielded a carbon having a wider pore size distribution...
January 10, 2017: Journal of Colloid and Interface Science
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