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https://www.readbyqxmd.com/read/28812195/design-and-evaluation-of-a-compact-photocatalytic-reactor-for-water-treatment
#1
Marko Kete, Olena Pliekhova, Lev Matoh, Urška Lavrenčič Štangar
A compact reactor for photocatalytic oxidation and photocatalytic ozonation water treatment was developed and evaluated by using four model pollutants. Additionally, combinations of pollutants were evaluated. Specially produced Al2O3 porous reticulated monolith foams served as TiO2 carriers, offering a high surface area support. UV lamps were placed in the interior to achieve reduced dimensions of the reactor (12 cm in diameter × 20 cm in height). Despite its small size, the overall photocatalytic cleaning capacity was substantial...
August 15, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28807422/assessment-of-heavy-metal-pollution-in-surficial-sediments-from-a-tropical-river-estuary-shelf-system-a-case-study-of-kelantan-river-malaysia
#2
Ai-Jun Wang, Chui Wei Bong, Yong-Hang Xu, Meor Hakif Amir Hassan, Xiang Ye, Ahmad Farid Abu Bakar, Yun-Hai Li, Zhi-Kun Lai, Jiang Xu, Kar Hoe Loh
To understand the source-to-sink of pollutants in the Kelantan River estuary and the adjacent shelf area in Malaysia, a total of 42 surface sediment samples were collected in the Kelantan River-estuary-shelf system to analyze for grain size, total organic carbon (TOC) content, Al and heavy metals (Cr, Ni, Cu, Zn, Cd and Pb). The surficial sediments were mainly composed of clayey silt and the TOC content in sediments decreased from the river to the shelf. The surficial sediments experienced Pb pollution; Cr only showed a certain level of pollution in the coastal area of the estuary but not in other areas, and Ni, Cu, Zn, and Cd showed no pollution...
August 11, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28806682/photolytic-insertion-of-albumin-on-activated-carbon-modified-with-ozone
#3
Regina de Fátima Peralta Muniz Moreira, Eduardo Humeres, Carolina Berger, M Isabel Fernández, J A Santaballa, Moisés Canle
254nm photolyses of bovine serum albumin [BSA] in aqueous solutions, were carried out in the presence of activated carbons modified by reaction with ozone. The photolyses were monitored by fluorescence spectroscopy and UV spectrophotometry, and the products were characterized by elemental analysis, FTIR, TGA, total organic carbon analyses [TOC], and XPS. The ozonation reaction was carried out at room temperature with O3 under dry and wet conditions. The carbon characterization showed that the reaction increased the amount of epoxide and carbonyl groups on the carbon matrix...
August 2, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28806247/glomus-tumor-of-the-neck-detected-with-99mtc-edda-hynic-toc
#4
Neva Girotto, Tatjana Bogović-Crnčić, Svjetlana Grbac-Ivanković, Petra Valković-Zujić
A 54-year-old woman was referred to thyroid evaluation because of a lump on the left side of the neck. Ultrasound exam did not show any thyroid abnormality, but highly perfused nodule at the left common carotid artery bifurcation was found. Because of the specific location, somatostatin receptor scintigraphy with Tc EDDA HYNIC-TOC was performed, starting with perfusion images and followed with SPECT/CT imaging at 2 and 4 hours. Well-perfused nodule with intensive accumulation and no other visible pathology in the body raised suspicion of a glomus tumor, consistent with MR exam performed later...
August 12, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28803372/oxidation-of-winery-wastewater-by-sulphate-radicals-catalytic-and-solar-photocatalytic-activations
#5
Jorge Rodríguez-Chueca, Carlos Amor, Joana Mota, Marco S Lucas, José A Peres
The treatment of winery effluents through sulphate radical-based advanced oxidation processes (SR-AOPs) driven by solar radiation is reported in this study. Photolytic and catalytic activations of peroxymonosulphate (PMS) and persulphate (KPS and SPS) at different pH values (4.5 and 7) were studied in the degradation of organic matter. Portugal is one of the largest wine producers in Europe. The wine making activities generate huge volume of effluents characterized by a variable volume and organic load, being their seasonal nature one of the most important drawbacks...
August 12, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28803343/sediment-lipid-biomarkers-record-phytoplankton-dynamics-of-lake-heihai-yunnan-province-sw-china-driven-by-climate-warming-since-the-1980s
#6
Yongdong Zhang, Yaling Su, Zhengwen Liu, Jinlei Yu, Miao Jin
Increased phosphorus (P) export from sediments to the overlying water column is a significant factor driving the variation of phytoplankton in productivity and community structure in lakes. However, the lack of long-term instrumental data often impeded analyses attempting to associate dynamics of phytoplankton with variation of internal P loading. Here, elements and lipid biomarkers were analyzed in a sediment core from Lake Heihai, a small, deep, and ultraoligotrophic alpine lake in Haba Mountain, Yunnan Province, SW China...
August 12, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28803097/a-parametric-response-surface-study-of-fermentative-hydrogen-production-from-cheese-whey
#7
Masoumeh Akhlaghi, Maria Rosaria Boni, Giorgia De Gioannis, Aldo Muntoni, Alessandra Polettini, Raffaella Pomi, Andreina Rossi, Daniela Spiga
Batch factorial experiments were performed on cheese whey+wastewater sludge mixtures to evaluate the influence of pH and the inoculum-to-substrate ratio (ISR) on fermentative H2 production and build a related predictive model. ISR and pH affected H2 potential and rate, and the fermentation pathways. The specific H2 yield varied from 61 (ISR=0, pH=7.0) to 371L H2/kg TOCwhey (ISR=1.44gVS/g TOC, pH=5.5). The process duration range was 5.3 (ISR=1.44gVS/g TOC, pH=7.5) - 183h (ISR=0, pH=5.5). The metabolic products included mainly acetate and butyrate followed by ethanol, while propionate was only observed once H2 production had significantly decreased...
July 29, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28802104/results-of-the-second-national-forest-soil-inventory-in-germany-interpretation-of-level-and-stock-profiles-for-pcdd-f-and-pcb-in-terms-of-vegetation-and-humus-type
#8
Marchela Pandelova, Bernhard Henkelmann, Bernd M Bussian, Karl-Werner Schramm
Polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs) and polychlorinated biphenyls (PCBs) were detected in 86 humic topsoil layers and in a subset of 11 randomly selected top mineral forest soils at the depths of 0-5cm and 5-10cm collected from different federal states of Germany. The distribution of these persistent organic pollutants (POPs) in humic topsoils with respect to vegetation cover (coniferous vs. deciduous vs. mixed), total organic carbon (TOC), altitude and latitude data was investigated...
August 9, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28799936/oily-wastewater-treatment-by-adsorption-membrane-filtration-hybrid-process-using-powdered-activated-carbon-natural-zeolite-powder-and-low-cost-ceramic-membranes
#9
Yaser Rasouli, Mohsen Abbasi, Seyed Abdollatif Hashemifard
In this research, four types of low cost and high performance ceramic microfiltration (MF) membranes have been employed in an in-line adsorption-MF process for oily wastewater treatment. Mullite, mullite-alumina, mullite-alumina-zeolite and mullite-zeolite membranes were fabricated as ceramic MF membranes by low cost kaolin clay, natural zeolite and α-alumina powder. Powdered activated carbon (PAC) and natural zeolite powder in concentrations of 100-800 mg L(-1) were used as adsorbent agent in the in-line adsorption-MF process...
August 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28797900/elimination-and-ecotoxicity-evaluation-of-phthalic-acid-esters-from-textile-dyeing-wastewater
#10
Jieying Liang, Xun-An Ning, Minyi Kong, Daohua Liu, Guangwen Wang, Haili Cai, Jian Sun, Yaping Zhang, Xingwen Lu, Yong Yuan
Phthalic acid esters (PAEs), presented in fabrics, surfactants and detergents, were discharged into the ecosystem during textile-dyeing wastewater treatment and might have adverse effects on water ecosystems. In this study, comprehensive investigations of the content and component distributions of 12 PAEs across different units of four textile-dyeing wastewater plants were carried out in Guangdong Province, China. Ecotoxicity assessments were also conducted based on risk quotients (RQs). On average, 93.54% TOC and 80...
August 7, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28777977/relationship-between-reactive-oxygen-species-and-water-soluble-organic-compounds-time-resolved-benzene-carboxylic-acids-measurement-in-the-coastal-area-during-the-korus-aq-campaign
#11
Min-Suk Bae, James J Schauer, Taehyoung Lee, Ju-Hee Jeong, Yoo-Keun Kim, Chul-Un Ro, Sang-Keun Song, Zang-Ho Shon
This study investigated the relationship between water-soluble organic compounds of ambient particulate matter (PM) and cellular redox activity collected from May 28 to June 20 of 2016 at the west coastal site in the Republic of Korea during the KORea-US Air Quality (KORUS-AQ) campaign. Automatic four-hour integrated samples operated at a flow rate of 92 L per minute for the analysis of organic carbon (OC), water-soluble organic carbon (WSOC), elemental carbon (EC), water-soluble ions (WSIs), and benzene carboxylic acids (BCAs) were collected on a 47 mm quartz fiber filter...
August 1, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28774617/monitoring-and-factors-affecting-levels-of-airborne-and-water-bromoform-in-chlorinated-seawater-swimming-pools
#12
Jean-Luc Boudenne, Julien Parinet, Carine Demelas, Tarek Manasfi, Bruno Coulomb
Water and air quality of eight seawater swimming pools using chlorine disinfection was measured during four sampling campaigns, spread on one full-year, and in four thalassotherapy centers located in Southeast of France. Concentrations of trihalomethanes (THMs) in air and in water as well as concentrations of parameters, including nonpurgeable organic carbon (NPOC), free residual chlorine (Clf), pH, Kjeldhal Nitrogen (KN), salinity, conductivity, bromide ions and, water and air temperature, were measured. Water and air samples were collected in triplicates morning - at the opening of the pools -, noon and night - at the closing of the pools -, in summer and winter...
August 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/28771348/chemical-analysis-of-fermentable-sugars-and-secondary-products-in-23-sweet-sorghum-cultivars
#13
Minori Uchimiya, Joseph Edward Knoll, William Frank Anderson, Karen R Harris-Shultz
Sorghum (Sorghum bicolor (L.) Moench) is a heat- and drought-tolerant crop that has promise to supplement corn (Zea mays L.) for biofuel production from fermentable sugars (for sweet cultivars) and lignocellulosic biomass. Quantitative relationships are lacking to predict the accumulation of primary (stem sugars) and secondary (organic acids, phenolics, and inorganic species) products that could either expand (as the value-added product) or limit (as the fermentation inhibitor) the market value of a cultivar...
August 3, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28764118/influence-of-biochemical-composition-during-hydrothermal-liquefaction-of-algae-on-product-yields-and-fuel-properties
#14
Rajdeep Shakya, Sushil Adhikari, Ravishankar Mahadevan, Saravanan R Shanmugam, Hyungseok Nam, El Barbary Hassan, Thomas A Dempster
Hydrothermal liquefaction (HTL) of nine algae species were performed at two reaction temperatures (280 and 320°C) to compare the effect of their biomass composition on product yields and properties. Results obtained after HTL indicate large variations in terms of bio-oil yields and its properties. The maximum bio-oil yield (66wt%) was obtained at 320°C with a high lipid containing algae Nannochloropsis. The higher heating value of bio-oils ranged from 31 to 36MJ/kg and around 50% of the bio-oils was in the vacuum gas oil range while high lipid containing algae Nannochloropsis contained a significant portion (33-42%) in the diesel range...
July 11, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28763655/improved-source-apportionment-of-pahs-and-pb-by-integrating-pb-stable-isotopes-and-positive-matrix-factorization-application-pahs-a-historical-record-case-study-from-the-northern-south-china-sea
#15
Minggang Cai, Yan Lin, Meng Chen, Weifeng Yang, Huihong Du, Ye Xu, Shayen Cheng, Fangjian Xu, Jiajun Hong, Mian Chen, Hongwei Ke
To obtain the historical changes of pyrogenic sources, integrated source apportionment methods, which include PAH compositions, diagnostic ratios (DRs), Pb isotopic ratios, and positive matrix factorization (PMF) model, were developed and applied in sediments of the northern South China Sea. These methods provided a gradually clear picture of energy structural change. Spatially, Σ15PAH (11.3 to 95.5ng/g) and Pb (10.2 to 74.6μg/g) generally exhibited decreasing concentration gradient offshore; while the highest levels of PAHs and Pb were observed near the southern Taiwan Strait, which may be induced by accumulation of different fluvial input...
July 27, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28762725/methane-and-co2-adsorption-capacities-of-kerogen-in-the-eagle-ford-shale-from-molecular-simulation
#16
Peter Psarras, Randall Holmes, Vikram Vishal, Jennifer Wilcox
Over the past decade, the United States has become a world leader in natural gas production, thanks in part to a large-fold increase in recovery from unconventional resources, i.e., shale rock and tight oil reservoirs. In an attempt to help mitigate climate change, these depleted formations are being considered for their long-term CO2 storage potential. Because of the variability in mineral and structural composition from one formation to the next (even within the same region), it is imperative to understand the adsorption behavior of CH4 and CO2 in the context of specific conditions and pore surface chemistry, i...
August 1, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28759786/high-purity-tocotrienols-attenuate-atherosclerotic-lesion-formation-in-apoe-ko-mice
#17
Akira Shibata, Teiko Kobayashi, Akira Asai, Takahiro Eitsuka, Shinichi Oikawa, Teruo Miyazawa, Kiyotaka Nakagawa
Previous studies have demonstrated that tocotrienol (T3) has antiatherogenic effects. However, the T3 preparations used in those studies contained considerable amounts of tocopherol (Toc), which might affect the biological activity of T3. There is little information on the effect of highly purified T3 on atherosclerosis formation. This study investigated the effect of high-purity T3 on atherosclerotic lesion formation and the underlying mechanisms. Male apolipoprotein E knockout (apoE-KO) mice were fed a cholesterol-containing diet either alone or supplemented with T3 concentrate (Toc-free T3) or with α-Toc for 12 weeks...
June 24, 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/28759448/a-novel-electro-catalytic-degradation-method-of-phenol-wastewater-with-ti-iro2-ta2o5-anodes-in-high-gravity-fields
#18
Jing Gao, Junjuan Yan, Youzhi Liu, Jiacheng Zhang, Zhiyuan Guo
In the electro-catalytic degradation process of phenol wastewater, bubbles and mass transfer limitation will result in the decrease in wastewater degradation efficiency, a long electrolysis time and a high energy consumption. Self-made Ti/IrO2-Ta2O5 anodes and a high-gravity electro-catalytic reactor were used to improve them. The Ti/IrO2-Ta2O5 anode was prepared with a thermal decomposition method and characterized by scanning electron microscopy (SEM). Under optimum conditions, the removal efficiencies of phenol, total organic carbon (TOC) and chemical oxygen demand (COD) respectively reached 94...
July 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28756068/a-phase-ii-randomized-double-blind-multicenter-study-to-evaluate-efficacy-and-safety-of-intravenous-iclaprim-versus-vancomycin-for-the-treatment-of-nosocomial-pneumonia-suspected-or-confirmed-to-be-due-to-gram-positive-pathogens
#19
David B Huang, Thomas M File, Antoni Torres, Andrew F Shorr, Mark H Wilcox, Paul Hadvary, Matthew Dryden, G Ralph Corey
PURPOSE: The primary objective of this Phase II study was to compare the clinical cure rates of 2 iclaprim dosages versus vancomycin in the treatment of patients with nosocomial pneumonia suspected or confirmed to be caused by gram-positive pathogens. METHODS: This study was a double-blind, randomized, multicenter trial. A total of 70 patients were randomized 1:1:1 to receive iclaprim 0.8 mg/kg IV q12h (iclaprim q12h; n = 23), iclaprim 1.2 mg/kg IV q8h (iclaprim q8h; n = 24), or vancomycin 1 g IV q12h (vancomycin; n = 23) for 7 to 14 days...
July 26, 2017: Clinical Therapeutics
https://www.readbyqxmd.com/read/28755551/natural-magnetic-pyrrhotite-as-a-high-efficient-persulfate-activator-for-micropollutants-degradation-radicals-identification-and-toxicity-evaluation
#20
Dehua Xia, Ran Yin, Jianliang Sun, Taicheng An, Guiying Li, Wanjun Wang, Huijun Zhao, Po Keung Wong
This study discusses the SO4(-) based process mediated by natural magnetic pyrrhotite (NP) for the degradation of refractory organic micropollutants. Complete degradation of 20μM phenol in distilled water (DW) was obtained within 20min using NP/PS (persulfate) system. Electron paramagnetic resonance spectra indicated aerobic and acidic conditions favored the generation of both SO4(-) and OH species, but only OH signal was survived at alkaline condition. The leaked Fe(2+) and Fe(II) of NP collectively work to activate PS and generate surface and bulk SO4(-) and OH simultaneously...
July 20, 2017: Journal of Hazardous Materials
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