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https://www.readbyqxmd.com/read/28549332/synthesis-and-characterization-of-fullerene-modified-znalti-ldo-in-photo-degradation-of-bisphenol-a-under-simulated-visible-light-irradiation
#1
Liting Ju, Pingxiao Wu, Xiaolin Lai, Shanshan Yang, Beini Gong, Meiqing Chen, Nengwu Zhu
In this study, ZnAlTi layered double hydroxide (ZnAlTi-LDH) combined with fullerene (C60) was fabricated by the urea method, and calcined under vacuum atmosphere to obtain nanocomposites of C60-modified ZnAlTi layered double oxide (ZnAlTi-LDO). The morphology, structure and composition of the nanocomposites were analyzed by Scanning Electron Microscopy, High-resolution transmission electron microscopy, X-ray diffraction patterns, Fourier transform infrared and specific surface area. The UV-vis diffuse reflectance spectra indicated that the incorporation of C60 expanded the absorption of ZnAlTi-LDO to visible-light region...
May 23, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28549328/enhanced-photocatalytic-hydrogen-production-from-aqueous-sulfide-sulfite-solution-by-zno0-6s0-4-with-simultaneous-dye-degradation-under-visible-light-irradiation
#2
Ka Him Chu, Liqun Ye, Wei Wang, Dan Wu, Donald Ka Long Chan, Cuiping Zeng, Ho Yin Yip, Jimmy C Yu, Po Keung Wong
Photocatalytic hydrogen (H2) production was performed by visible-light-driven (VLD) ternary photocatalyst, zinc oxysulfide (ZnO0.6S0.4) in the presence of sulfide/sulfite (S2(2-)/SO3(2-)) sacrificing system, with simultaneous azo-dye Reactive Violet 5 (RV5) degradation. Enhancement in both RV5 degradation and H2 production was achieved, with the promotion of H2 production after decolorization of RV5. The effect of initial concentration of RV5 was found to be influential on the enhancement of H2 during the simultaneous processes, with a maximum of 110% increase of H2 produced...
May 20, 2017: Chemosphere
https://www.readbyqxmd.com/read/28549324/salinity-and-sensitivity-to-endocrine-disrupting-chemicals-a-comparison-of-reproductive-endpoints-in-small-bodied-fish-exposed-under-different-salinities
#3
Thijs Bosker, Giacomo Santoro, Steven D Melvin
The influence of salinity on toxicity outcomes has been demonstrated for various contaminants, but has received limited attention for endocrine disrupting chemicals (EDCs). Short-term laboratory tests using small-bodied fish are an important tool for evaluating impacts of EDCs on reproduction. Tests have been developed for both freshwater and estuarine/marine species, providing an opportunity to assess whether concentrations at which small-bodied fish respond to EDCs may be influenced by salinity. We conducted a semi-quantitative review of short-term laboratory tests with small-bodied fish exposed to EDCs, including 59 studies under freshwater conditions (7 species) and 23 studies conducted under saline conditions (5 species)...
May 16, 2017: Chemosphere
https://www.readbyqxmd.com/read/28549303/end-of-life-eol-mobile-phone-management-in-hong-kong-households
#4
Wen-Jing Deng, John P Giesy, C S So, Hai-Long Zheng
A questionnaire survey and interviews were conducted in households and end-of-life (EoL) mobile phone business centres in Hong Kong. Widespread Internet use, combined with the rapid evolution of modern social networks, has resulted in the more rapid obsolescence of mobile phones, and thus a tremendous increase in the number of obsolete phones. In 2013, the volume of EoL mobile phones generated in Hong Kong totalled at least 330 tonnes, and the amount is rising. Approximately 80% of electronic waste is exported to Africa and developing countries such as mainland China or Pakistan for recycling...
May 23, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28549301/ecotoxicological-effect-of-ketamine-evidence-of-acute-chronic-and-photolysis-toxicity-to-daphnia-magna
#5
Shih-Wei Li, Yu-Hsiang Wang, Angela Yu-Chen Lin
Ketamine has been increasingly used in medicine and has the potential for abuse or illicit use around the world. Ketamine cannot be removed by conventional wastewater treatment plants. Although ketamine and its metabolite norketamine have been detected to a significant degree in effluents and aquatic environments, their ecotoxicity effects in aquatic organisms remain undefined. In this study, we investigated the acute toxicity of ketamine and its metabolite, along with the chronic reproductive toxicity of ketamine (5-100μg/L) to Daphnia magna...
May 23, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28549287/unconventional-energy-resources-in-a-crowded-subsurface-reducing-uncertainty-and-developing-a-separation-zone-concept-for-resource-estimation-and-deep-3d-subsurface-planning-using-legacy-mining-data
#6
Alison A Monaghan
Over significant areas of the UK and western Europe, anthropogenic alteration of the subsurface by mining of coal has occurred beneath highly populated areas which are now considering a multiplicity of 'low carbon' unconventional energy resources including shale gas and oil, coal bed methane, geothermal energy and energy storage. To enable decision making on the 3D planning, licensing and extraction of these resources requires reduced uncertainty around complex geology and hydrogeological and geomechanical processes...
May 23, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28549285/environmental-response-to-long-term-mariculture-activities-in-the-weihai-coastal-area-china
#7
Hongmei Li, Xiaomin Li, Qiang Li, Ying Liu, Jide Song, Yongyu Zhang
The environmental impacts of rapid expansion of mariculture have garnered worldwide attention. China is currently one of the largest countries to engage in this practice. In this study, a representative mariculture zone, the Weihai coastal area in China, was explored to determine the temporal variations in regional nutrients, N/P ratio, dissolved oxygen (DO), pH, chlorophyll a (Chl-a), and cellular abundance of diatoms and dinoflagellates in response to the rapid growth in mariculture activities between 2006 and 2014...
May 23, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28549272/acute-toxicity-of-emerging-atmospheric-pollutants-from-wood-lignin-due-to-biomass-burning
#8
Maryline Pflieger, Ana Kroflič
Guaiacol (2-methoxyphenol) is an important atmospheric pollutant. It is the major component of wood lignin and is essentially emitted to the atmosphere during biomass burning. Its aging in the tropospheric aqueous phase leads to the generation of the following ring-retaining transformation products, also during nighttime: 4-nitroguaiacol, 6-nitroguaiacol, and dinitroguaiacol. This study presents the first toxicological data of guaiacol and its nitro derivatives and reveals their harmful potential for the ecosystem...
May 15, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28549262/passive-sampling-of-wastewater-as-a-tool-for-the-long-term-monitoring-of-community-exposure-illicit-and-prescription-drug-trends-as-a-proof-of-concept
#9
J A Baz-Lomba, Christopher Harman, Malcolm Reid, Kevin V Thomas
A passive sampling device, the Polar Organic Chemical Integrative Sampler (POCIS), was calibrated in-situ over a 4-week period in Oslo (Norway) for 10 illicit drugs and pharmaceuticals with the goal of developing an approach for monitoring long-term wastewater drug loads. The calibrations were performed in triplicate using three different overlapping calibration sets under changing environmental conditions that allowed the uncertainty of the sampling rates to be evaluated. All 10 compounds exhibited linear uptake kinetics and provided sampling rates of between 0...
May 20, 2017: Water Research
https://www.readbyqxmd.com/read/28549254/comparative-early-stage-assessment-of-multiproduct-biorefinery-systems-an-application-to-the-isobutanol-platform
#10
Jonathan Moncada, John A Posada, Andrea Ramírez
An early stage assessment method is applied to the production of isobutanol from lignocellulosic biomass, and to three multiproduct portfolios from the conversion of isobutanol: Case 1: production of isobutyl acetate and glycerol tert-butyl ether (GTBE), Case 2: production of isobutyl acetate and ketones, and Case 3: production of isobutyl acetate alkanes. The method screens and compares each route with its equivalent petrochemical counterpart. The method is composed by different indicators involving economic and environmental aspects...
May 15, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28549206/assessment-of-allelic-diversity-among-drought-resistant-cotton-genotypes-using-microsatellite-markers
#11
A Javaid, F S Awan, F M Azhar, I A Khan
Drought, in conjunction with high temperature, is an important environmental constraint to cotton production. Development of cotton varieties with increased tolerance against adverse environmental conditions has been proposed as effective strategy for ensuring reliable yields. In the present study, 30 simple sequence repeat (SSR) primers were used to estimate genetic divergence among 22 cotton genotypes for drought stress tolerance. Genetic diversity is a prerequisite for developing drought resistant cotton genotypes...
May 25, 2017: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/28549182/single-provenance-mature-conifers-show-higher-non-structural-carbohydrate-storage-and-reduced-growth-in-a-drier-location
#12
Frida I Piper, Alex Fajardo, Günter Hoch
Since growth is more sensitive to drought than photosynthesis, trees inhabiting dry regions are expected to exhibit higher carbohydrate storage and less growth than their conspecifics from more humid regions. However, the same pattern can be the result of different genotypes inhabiting contrasting humidity conditions. To test if reduced growth and high carbohydrate storage are environmentally driven by drought, we examined the growth and non-structural carbohydrate (NSC) concentrations in single-provenance stands of mature trees of Pinus contorta Douglas and Pinus ponderosa Douglas ex C...
May 26, 2017: Tree Physiology
https://www.readbyqxmd.com/read/28549168/assessing-the-thermal-dissipation-sap-flux-density-method-for-monitoring-cold-season-water-transport-in-seasonally-snow-covered-forests
#13
Allison M Chan, David R Bowling
Productivity of conifers in seasonally snow-covered forests is high before and during snowmelt when environmental conditions are optimal for photosynthesis. Climate change is altering the timing of spring in many locations, and changes in the date of transition from winter dormancy can have large impacts on annual productivity. Sap flow methods provide a promising approach to monitor tree activity during the cold season and the winter-spring and fall-winter transitions. Although sap flow techniques have been widely used, cold season results are generally not reported...
May 26, 2017: Tree Physiology
https://www.readbyqxmd.com/read/28549139/response-to-behbod-b-et-al-environmental-and-public-health-tracking-to-advance-knowledge-for-planetary-health
#14
Patrick J Saunders, John D Middleton
No abstract text is available yet for this article.
June 1, 2017: European Journal of Public Health
https://www.readbyqxmd.com/read/28549107/physical-functioning-among-older-adults-new-to-long-term-services-and-supports
#15
Jo-Ana D Chase, Karen B Hirschman, Alexandra L Hanlon, Liming Huang, Kathryn H Bowles, Mary D Naylor
Background and Objectives: To identify determinants of self-reported physical functioning (PF) among older adults new to long-term services and supports (LTSS). Research Design and Method: Using the International Classification of Function, Disability, and Health (ICF) framework, we conducted a secondary analysis of self-reported data on symptoms, basic/instrumental activities of daily living, quality of life, assistive devices, physical therapy needs, prior healthcare utilization, health status, and demographics from 470 older adults new to LTSS (Home/Community-Based n = 156; Assisted Living n = 156; Nursing Home n = 158)...
May 25, 2017: Gerontologist
https://www.readbyqxmd.com/read/28548990/outbreaks-of-nontuberculous-mycobacteria
#16
Geeta Sood, Nikki Parrish
PURPOSE OF REVIEW: The purpose of this review is to summarize the emerging literature on nontuberculous mycobacteria outbreaks in healthcare settings. As our ability to identify mycobacterial species develops, we are better able to recognize epidemiologic connections and better understand the prevalence and importance of these outbreaks and pseudo-outbreaks in healthcare settings. RECENT FINDINGS: The number of outbreaks related to nontuberculous outbreaks is increasing because of heightened awareness and better diagnostic tests for species level identification of mycobacteria...
May 25, 2017: Current Opinion in Infectious Diseases
https://www.readbyqxmd.com/read/28548822/iron-containing-metal-organic-frameworks-structure-synthesis-and-applications-in-environmental-remediation
#17
Xiaocheng Liu, Yaoyu Zhou, Jiachao Zhang, Lin Tang, Lin Luo, Guangming Zeng
Metal-organic Frameworks (MOFs) with Fe content are gradually developing into an independent branch in environmental remediation, requiring economical, effective, low toxic strategies to the complete procedure. In this review, the recent advancements in the structure, synthesis and environmental application focusing on the mechanism are presented. The unique structure of novel design proposed specific characteristics of different iron containing MOFs with potential innovation. Synthesis of typical MILs, NH2-MILs and MILs based materials reveal the basis and defect of the current method, indicating the optimal means for the actual requirements...
May 26, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28548671/controllable-n-fe2o3-graphene-nanomaterials-by-ald-applied-in-an-aptasensor-with-enhanced-electrochemical-performance-for-thrombin-detection
#18
Hongfen Zhang, Baiyan Zhang, Anjia Chen, Yong Qin
An elegant atomic layer deposition (ALD) method has been employed for the controllable preparation of a uniform Fe2O3-coated graphene nanostructure (Fe2O3@graphene). The Fe2O3 coating thickness of the Fe2O3@graphene nanostructure can be tuned by varying the cycle number of Fe2O3 ALD. The produced Fe2O3@graphene composites are characterized by transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy and cyclic voltammetry (CV). It is revealed that Fe2O3 is effectively deposited on the surface of graphene...
May 26, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28548670/oxocomplexes-of-u-vi-with-8-hydroxyquinoline-5-sulfonate-in-solution-structural-studies-and-photophysical-behaviour
#19
M Luísa Ramos, Licínia L G Justino, Rui Barata, Telma Costa, Bernardo A Nogueira, Rui Fausto, Hugh D Burrows
Multinuclear ((1)H and (13)C) NMR, and Raman spectroscopy, combined with DFT calculations, provide detailed information on the complexation between U(vi) oxoions and 8-hydroxyquinoline-5-sulfonate (8-HQS) in aqueous solution. Over the concentration region studied, U(vi) oxoions (uranyl ions) form one dominant complex with 8-HQS in water in the pH range 3-6, a mononuclear 1 : 2 (metal : ligand) complex, with the metal centre (UO2(2+)) coordinated to two 8-HQS ligands, together with one or more water molecules...
May 26, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28548660/transcriptomic-and-micrornaomic-profiling-reveals-multi-faceted-mechanisms-to-cope-with-phosphate-stress-in-a-dinoflagellate
#20
Xinguo Shi, Xin Lin, Ling Li, Meizhen Li, Brian Palenik, Senjie Lin
Although gene regulation can occur at both transcriptional and epigenetic (microRNA) levels, combined transcriptomic and microRNAomic responses to environmental stress are still largely unexplored for marine plankton. Here, we conducted transcriptome and microRNAome sequencing for Prorocentrum donghaiense to understand the molecular mechanisms by which this dinoflagellate copes with phosphorus (P) deficiency. Under P-depleted conditions, G1/S specific cyclin gene was markedly downregulated, consistent with growth inhibition, and genes related to dissolved organic phosphorus (DOP) hydrolysis, carbon fixation, nitrate assimilation, glycolysis, and cellular motility were upregulated...
May 26, 2017: ISME Journal
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