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https://www.readbyqxmd.com/read/29778055/new-insights-into-the-effects-of-support-matrix-on-the-removal-of-organic-micro-pollutants-and-the-microbial-community-in-constructed-wetlands
#1
Liang Zhang, Tao Lyu, Carlos Andrés Ramírez Vargas, Carlos A Arias, Pedro N Carvalho, Hans Brix
Constructed wetlands (CWs) are an eco-friendly and cost-effective technology to remove organic micro-pollutants (OMPs) from wastewater. The support matrix is an important component in CWs as it has a primary role in the growth and development of plants and microbes. However, the roles of the support matrix in CWs in removing OMPs have not been systematically studied. Therefore, in this study, six common materials (sand, zeolite, blast iron slag, petcoke, polonite and crushed autoclaved aerated concrete (CAAC)) as support matrixes were firstly investigated by batch tests to explore their adsorption capacities to selected OMPs (ibuprofen, iohexol, tebuconazole and imazalil)...
May 16, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29777971/symmetric-supercapacitor-sulphurized-graphene-and-ionic-liquid
#2
Jasmin S Shaikh, Navajsharif S Shaikh, Rohini Kharade, Sonali A Beknalkar, Jyoti V Patil, Mahesh P Suryawanshi, Pongsakorn Kanjanaboos, Chang Kook Hong, Jin Hyeok Kim, Pramod S Patil
Symmetric supercapacitor is advanced over simple supercapacitor device due to their stability over a large potential window and high energy density. Graphene is a desired candidate for supercapacitor application since it has a high surface area, good electronic conductivity and high electro chemical stability. There is a pragmatic use of ionic liquid electrolyte for supercapacitor due to its stability over a large potential window, good ionic conductivity and eco-friendly nature. For high performance supercapacitor, the interaction between ionic liquid electrolyte and graphene are crucial for better charge transportation...
May 11, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29777430/the-artificial-humic-substance-hs1500-does-not-inhibit-photosynthesis-of-the-green-alga-desmodesmus-armatus-in-vivo-but-interacts-with-the-photosynthetic-apparatus-of-isolated-spinach-thylakoids-in-vitro
#3
Matthias Gilbert, Hanno Bährs, Christian E W Steinberg, Christian Wilhelm
Humic substances (HSs) can influence the growth and composition of freshwater phytoplankton assemblage. Since HSs contain many phenolic and quinonic moieties and cause growth reductions in eco-physiological field experiments, HSs are considered photosystem II herbicides. To test this specific mode of action in vivo and in vitro, respectively, we used intact cells of the green alga Desmodesmus armatus, as well as thylakoids isolated from spinach (Spinacia oleracea) as a model system for the green algal chloroplast...
May 18, 2018: Photosynthesis Research
https://www.readbyqxmd.com/read/29775942/toxicological-effects-on-earthworms-eisenia-fetida-exposed-to-sub-lethal-concentrations-of-bde-47-and-bde-209-from-a-metabolic-point
#4
Ruoyu Liang, Juan Chen, Yajuan Shi, Yonglong Lu, Suriyanarayanan Sarvajayakesavalu, Xiangbo Xu, Xiaoqi Zheng, Kifayatullah Khan, Chao Su
Earthworms improve the soil fertility and they are also sensitive to soil contaminants. Earthworms (Eisenia fetida), standard reference species, were usually chosen to culture and handle for toxicity tests. Metabolic responses in earthworms exposed to 2, 2', 4, 4'-tetrabromodiphenyl ether (BDE-47) and decabromodiphenyl ether (BDE-209) were inhibitory and interfered with basal metabolism. In this study, 1 H-NMR based metabolomics was used to identify sensitive biomarkers and explore metabolic responses of earthworms under sub-lethal BDE-47 and BDE-209 concentrations for 14 days...
May 15, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29775914/current-radiological-situation-in-areas-of-ukraine-contaminated-by-the-chernobyl-accident-part-1-human-dietary-exposure-to-caesium-137-and-possible-mitigation-measures
#5
I Labunska, V Kashparov, S Levchuk, D Santillo, P Johnston, S Polishchuk, N Lazarev, Y Khomutinin
This study reports for the first time temporal trends for the period of 2011-2016 in 137 Cs content in cow's milk originating from private farms and households of 14 settlements located in the territories of the Rivne region, Ukraine. These areas are still radioactively contaminated as a result of the accident at the Chernobyl Nuclear Power Plant (ChNPP) in 1986. In 2016, the average 137 Cs activity concentration in milk exceeded the Ukrainian Permissible Level (PL) for adults of 100 Bq/l in samples from 6 settlements and the PL for children of 40 Bq/l in 8 settlements, reaching activity concentration of around 500 Bq/l in some samples...
May 15, 2018: Environment International
https://www.readbyqxmd.com/read/29775394/degradation-of-ticarcillin-by-subcritial-water-oxidation-method-application-of-response-surface-methodology-and-artificial-neural-network-modeling
#6
Erdal Yabalak
This study was performed to investigate the mineralization of ticarcillin in the artificially prepared aqueous solution presenting ticarcillin contaminated waters, which constitute a serious problem for human health. 81.99% of total organic carbon removal, 79.65% of chemical oxygen demand removal, and 94.35% of ticarcillin removal were achieved by using eco-friendly, time-saving, powerful and easy-applying, subcritical water oxidation method in the presence of a safe-to-use oxidizing agent, hydrogen peroxide...
May 18, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29775278/hybrid-nanomaterials-with-single-site-catalysts-by-spatially-controllable-immobilization-of-nickel-complexes-via-photoclick-chemistry-for-alkene-epoxidation
#7
Dwaipayan Ghosh, Benny Febriansyah, Disha Gupta, Leonard Kia-Sheun Ng, Shibo Xi, Yonghua Du, Tom Baikie, ZhiLi Dong, Han Sen Soo
Catalyst deactivation is a persistent problem not only for the scientific community but also in industry. Isolated single-site heterogeneous catalysts have shown great promise to overcome these problems. Here, a versatile anchoring strategy for molecular complex immobilization on a broad range of semiconducting or insulating metal oxide (e.g. titanium dioxide, mesoporous silica, cerium oxide, and tungsten oxide) nanoparticles to synthesize isolated single-site catalysts has been studied systematically. An oxidatively stable anchoring group, maleimide, is shown to form covalent linkages with surface hydroxyl functionalities of metal oxide nanoparticles by photoclick chemistry...
May 18, 2018: ACS Nano
https://www.readbyqxmd.com/read/29775275/a-high-performance-and-recyclable-al-air-coin-cell-based-on-eco-friendly-chitosan-hydrogel-membranes
#8
Yisi Liu, Qian Sun, Xiaofei Yang, Jianneng Liang, Biqiong Wang, Alicia Koo, Ruying Li, Jie Li, Xueliang Sun
Aluminum-air batteries are a promising power supply for electronics due to its low cost and high energy density. However, portable coin-type Al-air batteries operating under ambient air condition for small electronic appliances have rarely been reported. Herein, coin cell-type Al-air batteries using cost-effective and eco-friendly chitosan hydrogel membranes modified by SiO2, SnO2, and ZnO have been prepared and assembled. The Al-air coin cell employing chitosan hydrogel membrane containing 10 wt.% SiO2 as a separator exhibits better discharge performance with a higher flat voltage plateau, longer discharge duration, and higher power density than the cells using a chitosan hydrogel membrane containing SnO2 or ZnO...
May 18, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29775207/structural-and-technological-characterisation-of-pectin-extracted-with-sodium-citrate-and-nitric-acid-from-sunflower-heads
#9
Nerea Muñoz-Almagro, Fabián Rico-Rodriguez, Peter J Wilde, Antonia Montilla, Mar Villamiel
An optimisation of temperature, time and extracting agent concentration of pectin extraction from sunflower heads using sodium citrate and nitric acid (SP-SC and SP-NA) was carried out. At optimal conditions, the yield of extraction with nitric acid (SPO-NA) was 2-fold greater than the corresponding with sodium citrate (SPO-SC) (14.3 vs 7.7%, respectively). Regarding pectin structure, the galacturonic acid (GalA) content in both, SPO-SC and SPO-NA, was similar (∼85%). However, SPO-NA showed lower molecular weight (Mw) (88...
May 18, 2018: Electrophoresis
https://www.readbyqxmd.com/read/29775124/metal-leaching-from-refinery-waste-hydroprocessing-catalyst
#10
Meena Marafi, Mohan S Rana
The present study aims to develop an eco-friendly methodology for the recovery of nickel (Ni), molybdenum (Mo), and vanadium (V) from the refinery waste spent hydroprocessing catalyst. The proposed process has two stages: the first stage is to separate alumina, while the second stage involves the separation of metal compounds. The effectiveness of leaching agents, such as NH4 OH, (NH4 )2 CO3 , and (NH4 )2 S2 O8 , for the extraction of Mo, V, Ni, and Al from the refinery spent catalyst has been reported as a function of reagent concentration (0...
May 18, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29775098/phytofiltration-of-anaerobically-digested-sugarcane-ethanol-stillage-using-a-macrophyte-with-high-potential-for-biofuel-production
#11
Gloria Sánchez-Galván, Yanet Bolaños-Santiago
Anaerobically digested stillage (ADS) requires treatment before being discharged into water bodies or soils to avoid adverse effects. Phytofiltration systems are eco-friendly technologies for wastewater treatment, and they simultaneously serve as a source of biomass for biofuel production. The aim of the present study was to investigate the phytofiltration of ADS using Azolla sp. The effects of the ADS strength (dilutions 1: 50 and 1 : 25 v/v) and initial biomass density (IBD) [15.44 (IBD1) and 23.16 (IBD2) g dry weight (dw) m-2 ] on plant growth and pollutant removal were assessed...
July 3, 2018: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/29774427/largely-flat-latitudinal-life-history-clines-in-the-dung-fly-sepsis-fulgens-across-europe-diptera-sepsidae
#12
Jeannine Roy, Wolf U Blanckenhorn, Patrick T Rohner
Clinal variation in body size and related life history traits is common and has stimulated the postulation of several eco-geographical rules. Whereas some clinal patterns are clearly adaptive, the causes of others remain obscure. We investigated intra-specific body size, development time and female fecundity (egg size and number) clines across 13 European populations of the dung fly Sepsis fulgens spanning 20° latitude from southern Italy to Estonia in a genetic common garden approach. Despite very short generation times (ca...
May 17, 2018: Oecologia
https://www.readbyqxmd.com/read/29774292/evaluation-of-phytosynthesised-silver-nanoparticles-from-leaf-extracts-of-leucas-aspera-and-hyptis-suaveolens-and-their-larvicidal-activity-against-malaria-dengue-and-filariasis-vectors
#13
Devan Elumalai, Maduraiveeran Hemavathi, Chandrasekar Vijayalakshmi Deepaa, Patheri Kunyil Kaleena
The present study deals with the green synthesis of silver nanoparticle from the aqueous leaf extracts of Leucas aspera and Hyptis suaveolens as reducing agent and to investigate the larvicidal activity of synthesized silver nanoparticles. The synthesized silver nanoparticles were characterized by Ultraviolet and visible absorption spectroscopy (UV), Fourier transform-infrared spectroscopy (FT-IR), X-ray spectroscopy (XRD), Field emission scanning electron microscope (FESEM) and High-resonance transmission electron microscopy (HRTEM) analysis...
November 2017: Parasite Epidemiology and Control
https://www.readbyqxmd.com/read/29773392/design-of-reusable-novel-membranes-based-on-bacterial-cellulose-and-chitosan-for-the-filtration-of-copper-in-wastewaters
#14
Leire Urbina, Olatz Guaresti, Jesús Requies, Nagore Gabilondo, Arantxa Eceiza, Maria Angeles Corcuera, Aloña Retegi
This study has been carried out to design novel, environmentally friendly membranes by in situ and ex situ routes based on bacterial cellulose (BC) as a template for the chitosan (Ch) as functional entity for the elimination of copper in wastewaters. Two routes led to bionanocomposites with different aspect and physico-chemical properties. The mechanical behaviour in wet state, strongly related to crystallinity and water holding capacity, resulted to be very different depending on the preparation route although the Ch content was very similar: 35 and 37 wt% for the in situ and ex situ membranes, respectively...
August 1, 2018: Carbohydrate Polymers
https://www.readbyqxmd.com/read/29773336/seasonal-dynamics-geographical-range-size-hosts-genetic-diversity-and-phylogeography-of-amblyomma-sculptum-in-argentina
#15
Evelina L Tarragona, Patrick S Sebastian, María N Saracho Bottero, Emilia I Martinez, Valeria N Debárbora, Atilio J Mangold, Alberto A Guglielmone, Santiago Nava
The aim of this work was to generate knowledge on ecological aspects of Amblyomma sculptum in Argentina, such as seasonal dynamics, geographical range size, hosts, genetic diversity and phylogeography. Adult and immature A. sculptum ticks were collected in different localities of Argentina to know the geographical range size and hosts. The genetic diversity of this tick was studied through analyses of 16S rDNA sequences. To describe the seasonal dynamics, free-living ticks were monthly collected from October 2013 to October 2015...
April 27, 2018: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/29773129/in-vitro-acaricide-and-anticholinesterase-activities-of-digitaria-insularis-poaceae-against-rhipicephalus-boophilus-microplus
#16
Francianne Oliveira Santos, Hélimar Gonçalves Lima, Soraia de Souza Santa Rosa, Nayana Borges das Mercês, Taiane Menezes Serra, Rosângela Soares Uzeda, Isabella Mary Alves Reis, Mariana Borges Botura, Alexsandro Branco, Maria José Moreira Batatinha
Medicinal plants have been proposed as an alternative for acaricide control, aiming to develop lower-cost and eco-friendly ectoparasiticide products. The aim of this study was to evaluate the in vitro activity of the extracts and fractions obtained from the leaves of Digitaria insularis on the reproductive efficacy of the bovine tick Rhipicephalus (Boophilus) microplus. Also, we investigated the possible relation with the anticholinesterase mechanism. The effect of the crude hydroethanolic (CH), hexanic (HE), ethyl acetate (EA), butanolic (BT) and residual hydroethanolic (RH) extracts, as well as four fractions of HE, were evaluated using adult immersion test...
May 15, 2018: Veterinary Parasitology
https://www.readbyqxmd.com/read/29772512/distribution-and-speciation-of-mercury-affected-by-humic-acid-in-mariculture-sites-at-the-pearl-river-estuary
#17
Lingyun Ding, Kaiyun Zhao, Lijuan Zhang, Peng Liang, Shengchun Wu, Ming Hung Wong, Huchun Tao
At the Pearl River Estuary of southern China, mercury and its environmental problems have long been a great concern. This study investigated the distribution and speciation of mercury compounds that are significantly influenced by the increasing content of humic acid (HA, a model natural organic matter) in this region. The inorganic mercury and methyl mercury, being adsorbed and converted at different HA levels, were studied in sediments and surface water at both mariculture and their reference sites. In mariculture sediments with higher HA content (up to 4...
May 14, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29769098/wing-morphometrics-of-aedes-ochlerotatus-albifasciatus-macquart-1838-diptera-culicidae-from-different-climatic-regions-of-argentina
#18
Maximiliano J Garzón, Nicolás Schweigmann
BACKGROUND: Gene flow restrictions between populations of Aedes albifasciatus, the vector of Western equine encephalitis and Dirophilaria immitis, have been described in the central region of Argentina. Genetic and eco-physiological variations usually result in local forms reflecting the climatic regions. Mosquito wings and their different parts have ecological functions in flight and communication. Therefore, wing shape could be considered an aspect of sexual dimorphism, and its eco-physiological responses can be expressed as morphological changes induced by the environment...
May 16, 2018: Parasites & Vectors
https://www.readbyqxmd.com/read/29768242/antibacterial-anticancer-and-antioxidant-potential-of-silver-nanoparticles-engineered-using-trigonella-foenum-graecum-seed-extract
#19
Shivangi Goyal, Nidhi Gupta, Ajeet Kumar, Sreemoyee Chatterjee, Surendra Nimesh
In this study, the authors report a simple and eco-friendly method for the synthesis of silver nanoparticles (AgNPs) using Trigonella foenum-graecum (TFG) seed extract. They explored several parameters dictating the biosynthesis of TFG-AgNPs such as reaction time, temperature, concentration of AgNO3 , and TFG extract amount. Physicochemical characterisation of TFG-AgNPs was done on dynamic light scattering (DLS), field emission electron microscopy, energy dispersive X-ray spectroscopy, X-ray diffraction and Fourier transform infrared spectroscopy...
June 2018: IET Nanobiotechnology
https://www.readbyqxmd.com/read/29768236/rapid-synthesis-of-bi-2-o-3-nano-needles-via-green-route-and-evaluation-of-its-anti-fungal-activity
#20
Abhishek R Indurkar, Viraj D Sangoi, Prashant B Patil, Mansingraj S Nimbalkar
Here, the authors report a rapid, simple, and eco-friendly process for synthesis of Bi2 O3 nano-needles. Dioscorea alata tuber extract was used as both reducing and capping agent for the first time. These nanoparticles were characterised by X-ray diffraction, field emission scanning electron microscope, and Fourier transform infrared (FTIR) spectrometry, the nano-structured Bi2 O3 needles have an average diameter of 158 nm with the lengths in the range of 1-3 μm. CLSI M27-A2 standard was followed for evaluation of anti-fungal activity...
June 2018: IET Nanobiotechnology
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