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https://www.readbyqxmd.com/read/28719869/effectiveness-of-table-top-water-pitcher-filters-to-remove-arsenic-from-drinking-water
#1
Roxanna Barnaby, Amanda Liefeld, Brian P Jackson, Thomas H Hampton, Bruce A Stanton
Arsenic contamination of drinking water is a serious threat to the health of hundreds of millions of people worldwide. In the United States ~3 million individuals drink well water that contains arsenic levels above the Environmental Protection Agency (EPA) maximum contaminant level (MCL) of 10μg/L. Several technologies are available to remove arsenic from well water including anion exchange, adsorptive media and reverse osmosis. In addition, bottled water is an alternative to drinking well water contaminated with arsenic...
July 15, 2017: Environmental Research
https://www.readbyqxmd.com/read/28719840/environmental-and-human-health-challenges-of-industrial-livestock-and-poultry-farming-in-china-and-their-mitigation
#2
REVIEW
Yuanan Hu, Hefa Cheng, Shu Tao
Driven by the growing demand for food products of animal origin, industrial livestock and poultry production has become increasingly popular and is on the track of becoming an important source of environmental pollution in China. Although concentrated animal feeding operations (CAFOs) have higher production efficiency and profitability with less resource consumption compared to the traditional family-based and "free range" farming, they bring significant environmental pollution concerns and pose public health risks...
July 15, 2017: Environment International
https://www.readbyqxmd.com/read/28719082/determination-of-seven-drugs-of-abuse-and-their-metabolites-in-surface-and-waste-water-using-solid-phase-extraction-coupled-to-liquid-chromatography-with-high-resolution-mass-spectrometry
#3
Helena Prosen, Núria Fontanals, Francesc Borrull, Rosa Maria Marcé
A method based on liquid chromatography with electrospray ionization high-resolution mass spectrometry (Exactive Orbitrap) combined with solid-phase extraction using a strong cationic exchange mixed-mode sorbent has been developed for the determination of seven drugs of abuse, including two synthetic cathinones, as well as some of their metabolites in environmental water samples. The method provides low detection limits and a high confirmation power thanks to the diagnostic and two fragment ions monitored for each compound in high-resolution mass spectrometry, providing six identification points for each analyte...
July 18, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/28718785/uv-surface-treatment-of-fungal-resistant-polyether-polyurethane-film-induced-growth-of-entomopathogenic-fungi
#4
Gabriela Albara Lando, Letícia Marconatto, Felipe Kessler, William Lopes, Augusto Schrank, Marilene Henning Vainstein, Daniel Eduardo Weibel
Synthetic polymers are the cause of some major environmental impacts due to their low degradation rates. Polyurethanes (PU) are widely used synthetic polymers, and their growing use in industry has produced an increase in plastic waste. A commercial polyether-based thermoplastic PU with hydrolytic stability and fungus resistance was only attacked by an entomopathogenic fungus, Metarhiziumanisopliae, when the films were pre-treated with Ultraviolet (UV) irradiation in the presence of reactive atmospheres. Water contact angle, Fourier transform infrared spectroscopy in attenuated total reflection mode (FTIR-ATR), scanning electron microscopy (SEM), and profilometer measurements were mainly used for analysis...
July 18, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28718028/predicting-attenuation-of-solar-radiation-uv-b-uv-a-and-par-in-waste-stabilization-ponds-under-sahelian-climatic-conditions
#5
Ynoussa Maiga, Joseph Wethé, Aboubakar Sidiki Ouattara, Alfred S Traoré
Because of its importance in pathogen removal and algal productivity in waste stabilization ponds, sunlight penetration was measured in microcosms and in situ under Sahelian climatic conditions. The different wavelengths were detected using a submersible radiometer equipped with three sensors: UV-B (311 nm), UV-A (369 nm) and photosynthetically available radiation (PAR, 400-700 nm). UV-B was more attenuated than UV-A and PAR. Facultative pond was more light-attenuating than maturation pond. The mean euphotic depths for UV-B were 0...
July 17, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28715742/development-of-high-performance-supercapacitor-electrode-derived-from-sugar-industry-spent-wash-waste
#6
Ashesh Mahto, Rajeev Gupta, Krishna Kanta Ghara, Divesh N Srivastava, Pratyush Maiti, Kalpana D, Paul Zavala-Revira, R Meena, S K Nataraj
This study aims at developing supercapacitor materials from sugar and distillery industry wastes, thereby mediating waste disposal problem through reuse. In a two-step process, biomethanated spent wash (BMSW) was acid treated to produce solid waste sludge and waste water with significantly reduced total organic carbon (TOC) and biological oxygen demand (BOD) content. Further, waste sludge was directly calcined in presence of activating agent ZnCl2 in inert atmosphere resulting in high surface area (730-900m(2)g(-1)) carbon of unique hexagonal morphology...
June 23, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28715737/static-and-continuous-flow-through-pulsed-light-technology-for-pesticide-abatement-in-water
#7
Ana Beatriz Baranda, Amaia Lasagabaster, Iñigo Martínez de Marañón
Perspectives concerning pulsed light (PL) technology as a novel water decontamination treatment are overviewed in this work. Degradation of atrazine, malathion, chlorpyriphos-methyl and bromopropylate in aqueous solutions at different concentrations was performed employing static and continuous flow-through PL units. Results for both PL systems were compared in terms of efficacy of pesticides degradation and derived photoproducts formed. The pesticides degradation increased with the applied total fluence for both PL systems...
July 8, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28715735/coupling-electrochemical-and-biological-methods-for-17%C3%AE-ethinylestradiol-removal-from-water-by-different-microorganisms
#8
Huan He, Bin Huang, Gen Fu, Yanan Du, Dan Xiong, Chaochao Lai, Xuejun Pan
17α-ethynylestradiol (EE2) has become a growing concern due to its wide detection and high estrogenic potency. However, biodegradation of EE2 with individual microorganisms demonstrated poor degradation efficiency ranging from 10.3% to 45.8% in 120h. Now, a system combining electrochemical with biological degradation was tested for its ability to remove EE2 from aqueous solution. EE2 removal is promoted at high dissolved oxygen concentrations and low pH when electrochemical methods alone are employed. Coupling electrochemical methods with anaerobic bacteria can improve the EE2 removal after 90min to as much as 81...
June 30, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28715679/a-parametric-study-on-hydraulic-conductivity-and-self-healing-properties-of-geotextile-clay-liners-used-in-landfills
#9
Fatemeh Parastar, Sayyed Mahdi Hejazi, Mohammad Sheikhzadeh, Azam Alirezazadeh
Nowadays, the raise of excessive generation of solid wastes is considered as a major environmental concern due to the fast global population growth. The contamination of groundwater from landfill leachate compromises every living creature. Geotextile clay liner (GCL) that has a sandwich structure with two fibrous sheets and a clay core can be considered as an engineered solution to prevent hazardous pollutants from entering into groundwater. The main objective of the present study is therefore to enhance the performance of GCL structures...
July 14, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28714188/energy-efficient-oil-water-separation-of-biomimetic-copper-membrane-with-multiscale-hierarchical-dendritic-structures
#10
Zhiwu Han, Bo Li, Zhengzhi Mu, Shichao Niu, Junqiu Zhang, Luquan Ren
Membrane-based materials with special surface wettability have been applied widely for the treatment of increasing industrial oily waste water, as well as frequent oil spill accidents. However, traditional technologies are energy-intensive and limited, either by fouling or by the inability of a single membrane to separate all types of oil-water mixtures. Herein, a biomimetic monolayer copper membrane (BMCM), composed of multiscale hierarchical dendritic structures, is cleverly designed and successfully fabricated on steel mesh substrate...
July 17, 2017: Small
https://www.readbyqxmd.com/read/28709875/bioelectrohydrogenesis-and-inhibition-of-methanogenic-activity-in-microbial-electrolysis-cells-a-review
#11
REVIEW
Rengasamy Karthikeyan, Ka Yu Cheng, Ammaiyappan Selvam, Arpita Bose, Jonathan W C Wong
Microbial electrolysis cells (MECs) are a promising technology for biological hydrogen production. Compared to abiotic water electrolysis, a much lower electrical voltage (~0.2V) is required for hydrogen production in MECs. It is also an attractive waste treatment technology as a variety of biodegradable substances can be used as the process feedstock. Underpinning this technology is a recently discovered bioelectrochemical pathway known as "bioelectrohydrogenesis". However, little is known about the mechanism of this pathway, and numerous hurdles are yet to be addressed to maximize hydrogen yield and purity...
July 11, 2017: Biotechnology Advances
https://www.readbyqxmd.com/read/28708835/green-and-facile-approach-for-enhancing-the-inherent-magnetic-properties-of-carbon-nanotubes-for-water-treatment-applications
#12
Mohamed Ateia, Christian Koch, Stanislav Jelavić, Ann Hirt, Jonathan Quinson, Chihiro Yoshimura, Matthew Johnson
Current methods for preparing magnetic composites with carbon nanotubes (MCNT) commonly include extensive use of treatment with strong acids and result in massive losses of carbon nanotubes (CNTs). In this study we explore the potential of taking advantage of the inherent magnetic properties associated with the metal (alloy or oxide) incorporated in CNTs during their production. The as-received CNTs are refined by applying a permanent magnet to a suspension of CNTs to separate the high-magnetic fraction; the low-magnetic fraction is discarded with the solvent...
2017: PloS One
https://www.readbyqxmd.com/read/28708308/arsenic-resistant-and-plant-growth-promoting-firmicutes-and-%C3%AE-proteobacteria-species-from-industrially-polluted-irrigation-water-and-corresponding-cropland
#13
Nayab Qamar, Yasir Rehman, Shahida Hasnain
AIMS: The aim of the study was to explore irrigation water polluted with industrial waste and corresponding cropland to screen bacteria for As-detoxification and plant growth promotion. METHODS AND RESULTS: Plant growth promoting As-resistant cropland bacteria were isolated from contaminated irrigation water and corresponding agricultural soil. Phylogenetic analysis revealed that the isolates belonged to 2 distinct bacterial lineages; Firmicutes and γ-Proteobacteria...
July 14, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28708077/environmental-drivers-and-predicted-risk-of-bacillary-dysentery-in-southwest-china
#14
Han Zhang, Yali Si, Xiaofeng Wang, Peng Gong
Bacillary dysentery has long been a considerable health problem in southwest China, however, the quantitative relationship between anthropogenic and physical environmental factors and the disease is not fully understand. It is also not clear where exactly the bacillary dysentery risk is potentially high. Based on the result of hotspot analysis, we generated training samples to build a spatial distribution model. Univariate analyses, autocorrelation and multi-collinearity examinations and stepwise selection were then applied to screen the potential causative factors...
July 14, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28707885/continuous-and-inexpensive-monitoring-of-non-purgeable-organic-carbon-by-coupling-high-efficiency-photo-oxidation-vapor-generation-to-miniaturized-point-discharge-optical-emission-spectrometry
#15
Shu Zhang, Yunfei Tian, Hongling Yin, Yubin Su, Li Wu, Xiandeng Hou, Chengbin Zheng
Currently, no applicable analyzers are available to accomplish online and continuous monitoring of organic pollution, which is one of the most important factors contributing to water shortages around the world, particularly in developing countries. In this work, a sensitive, miniaturized, inexpensive, on-line and continuous non-purgeable organic carbon (NPOC) analysis system was developed for the continuous monitoring of such organic pollution. This system consists of a specially designed and high efficiency UV photo-oxidation vapor generation (HE-POVG) reactor and a miniaturized, low power (7 W) point discharge microplasma optical emission spectrometer (PD-OES)...
July 14, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28707235/adsorptive-removal-of-five-heavy-metals-from-water-using-blast-furnace-slag-and-fly-ash
#16
Thuy Chung Nguyen, Paripurnanda Loganathan, Tien Vinh Nguyen, Jaya Kandasamy, Ravi Naidu, Saravanamuthu Vigneswaran
Heavy metals can be serious pollutants of natural water bodies causing health risks to humans and aquatic organisms. The purpose of this study was to investigate the removal of five heavy metals from water by adsorption onto an iron industry blast furnace slag waste (point of zero charge (PZC) pH 6.0; main constituents, Ca and Fe) and a coal industry fly ash waste (PZC 3.0; main constituents, Si and Al). Batch study revealed that rising pH increased the adsorption of all metals with an abrupt increase at pH 4...
July 13, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28704773/the-influence-of-protruding-filamentous-bacteria-on-floc-stability-and-solid-liquid-separation-in-the-activated-sludge-process
#17
Wilhelm Burger, Konrad Krysiak-Baltyn, Peter J Scales, Gregory J O Martin, Anthony D Stickland, Sally L Gras
Filamentous bacteria can impact on the physical properties of flocs in the activated sludge process assisting solid-liquid separation or inducing problems when bacteria are overabundant. While filamentous bacteria within the flocs are understood to increase floc tensile strength, the relationship between protruding external filaments, dewatering characteristics and floc stability is unclear. Here, a quantitative methodology was applied to determine the abundance of filamentous bacteria in activated sludge samples from four wastewater treatment plants...
June 23, 2017: Water Research
https://www.readbyqxmd.com/read/28702910/a-novel-biocoagulant-agent-from-mushroom-chitosan-as-water-and-wastewater-therapy
#18
Oday Adnan, Zurina Z Abidin, Azni Idris, Suryani Kamarudin, Mothanna Sadiq Al-Qubaisi
A new commercial cationic polyelectrolyte chitosan (CM), obtained from the waste of mushroom production, was examined using models of water and wastewater namely kaolin and palm oil mill effluent (pome). As it is biocompatible, widely available, and economically feasible, chitosan mushroom has high potential to be a suitable replacement for alum. Also, it can be a promising alternative to chitosan obtained traditionally from Crustaceans due to its higher zeta potential and homogeneity based on the raw material required for its production...
July 12, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28700235/quantitative-crassphage-pcr-assays-for-human-fecal-pollution-measurement
#19
Elyse Stachler, Catherine Kelty, Mano Sivaganesan, Xiang Li, Kyle Bibby, Orin C Shanks
Environmental waters are monitored for fecal pollution to protect public health and water resources. Traditionally, general fecal indicator bacteria are used; however, they cannot distinguish human fecal waste from other animal pollution sources. Recently, a novel bacteriophage, crAssphage, was discovered by metagenomic data mining and reported to be abundant in and closely associated with human fecal waste. To confirm bioinformatic predictions, 384 primer sets were designed along the length of the crAssphage genome...
July 12, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28699344/watershed-scale-impacts-from-surface-water-disposal-of-oil-and-gas-wastewater-in-western-pennsylvania
#20
William D Burgos, Luis Castillo-Meza, Travis L Tasker, Thomas J Geeza, Patrick J Drohan, Xiaofeng Liu, Joshua D Landis, Jens Blotevogel, Molly McLaughlin, Thomas Borch, Nathaniel R Warner
Combining horizontal drilling with high volume hydraulic fracturing has increased extraction of hydrocarbons from low-permeability oil and gas (O&G) formations across the United States; accompanied by increased wastewater production. Surface water discharges of O&G wastewater by centralized waste treatment (CWT) plants pose risks to aquatic and human health. We evaluated the impact of surface water disposal of O&G wastewater from CWT plants upstream of the Conemaugh River Lake (dam controlled reservoir) in western Pennsylvania...
July 12, 2017: Environmental Science & Technology
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