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https://www.readbyqxmd.com/read/29679943/photocatalytic-decomposition-of-selected-biologically-active-compounds-in-environmental-waters-using-tio-2-polyaniline-nanocomposites-kinetics-toxicity-and-intermediates-assessment
#1
Daniela V Šojić Merkulov, Vesna N Despotović, Nemanja D Banić, Sanja J Armaković, Nina L Finčur, Marina J Lazarević, Dragana D Četojević-Simin, Dejan Z Orčić, Marija B Radoičić, Zoran V Šaponjić, Mirjana I Čomor, Biljana F Abramović
A comprehensive study of the removal of selected biologically active compounds (pharmaceuticals and pesticides) from different water types was conducted using bare TiO2 nanoparticles and TiO2 /polyaniline (TP-50, TP-100, and TP-150) nanocomposite powders. In order to investigate how molecular structure of the substrate influences the rate of its removal, we compared degradation efficiency of the initial substrates and degree of mineralization for the active components of pharmaceuticals (propranolol, and amitriptyline) and pesticides (sulcotrione, and clomazone) in double distilled (DDW) and environmental waters...
April 18, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29679932/tcnq-molecular-semiconductor-of-the-cu-ii-taab-macrocycle-optical-and-electrical-properties
#2
M E Sánchez Vergara, R Salcedo, Bertha Molina, R Carrera-Téllez, J R Álvarez-Bada, A Hernández-García, V Gómez-Vidales
The present study reports the doping of a semiconducting molecular material through the formation of hydrogen bonds between the macrocycle Cu(II)(TAAB) and the electronic acceptor TCNQ. According to density functional theory (DFT) calculations and electron paramagnetic resonance (EPR) analysis, the doped compound has the shape of a distorted square pyramid, with four nitrogen atoms in the equatorial position and the apical oxygen atom from the water ligands. These water molecules can generate strong hydrogen bonds with TCNQ and the TAAB metallic complex...
April 11, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29679931/a-dual-spectroscopic-fluorescence-probe-based-on-carbon-dots-for-detection-of-2-4-6-trinitrophenol-fe-iii-ion-by-fluorescence-and-frequency-doubling-scattering-spectra-and-its-analytical-applications
#3
Jinxia Xu, Zhangjun Bai, Fanlin Zu, Fanyong Yan, Junfu Wei, Saihui Zhang, Yunmei Luo
A convenient, highly sensitive and reliable assay for 2,4,6‑trinitrophenol (TNP) and Fe (III) ion (Fe3+ ) in the dual spectroscopic manner is developed based on novel carbon dots (CDs). The CDs with highly blue emitting fluorescent were easily prepared via the one-step potassium hydroxide-assisted reflux method from dextrin. The as-synthesized CDs exhibited the high crystalline quality, the excellent fluorescence characteristics with a high quantum yield of ~13.1%, and the narrow size distribution with an average diameter of 6...
April 10, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29679917/possible-impacts-of-sea-level-rise-on-disease-transmission-and-potential-adaptation-strategies-a-review
#4
REVIEW
Ana C Dvorak, Helena M Solo-Gabriele, Andrea Galletti, Bernardo Benzecry, Hannah Malone, Vicki Boguszewski, Jason Bird
Sea levels are projected to rise in response to climate change, causing the intrusion of sea water into land. In flat coastal regions, this would generate an increase in shallow water covered areas with limited circulation. This scenario raises a concern about the consequences it could have on human health, specifically the possible impacts on disease transmission. In this review paper we identified three categories of diseases which are associated with water and whose transmission can be affected by sea level rise...
April 18, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29679916/a-novel-framework-for-the-use-of-remote-sensing-for-monitoring-catchments-at-continental-scales
#5
A B Bugnot, M B Lyons, P Scanes, G F Clark, S K Fyfe, A Lewis, E L Johnston
Historical ecology can teach us valuable lessons on the processes and drivers of environmental change that can inform future monitoring priorities and management strategies. Environmental data to study environmental history, however, is often absent or of low quality. Even when studying changes occurring during the last few decades, monitoring efforts are scarce due to logistical and cost limitations, leaving large areas unassessed. The aim of this study is to evaluate the use of estuarine water colour as an indicator of historical environmental change in catchments...
April 18, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29679915/application-of-solar-photo-fenton-for-benzophenone-type-uv-filters-removal
#6
Henry Zúñiga-Benítez, Gustavo A Peñuela
Benzophenones (BPs) family is one of the most frequently used groups of UV-filters. However, it has been reported by different authors that this kind of chemical compounds could be associated with some endocrine disrupting activity, genotoxicity and reproductive toxicity. In addition, different studies have evidenced the presence of BPs in several environmental matrices, indicating that conventional technologies of water treatment are not able to remove them, which generates the necessity of evaluating new alternatives of remediation...
April 18, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29679891/removal-of-arsenic-and-mercury-species-from-water-by-covalent-triazine-framework-encapsulated-%C3%AE-fe-2-o-3-nanoparticles
#7
Karen Leus, Karel Folens, Nina Ricci Nicomel, Jeffrey Paulo H Perez, Maria Filippousi, Maria Meledina, Marinela M Dîrtu, Stuart Turner, Gustaaf Van Tendeloo, Yann Garcia, Gijs Du Laing, Pascal Van Der Voort
The covalent triazine framework, CTF-1, served as host material for the in situ synthesis of Fe2 O3 nanoparticles. The composite material consisted of 20 ± 2 m% iron, mainly in γ-Fe2 O3 phase. The resulting γ-Fe2 O3 @CTF-1 was examined for the adsorption of AsIII , AsV and HgII from synthetic solutions and real surface-, ground- and wastewater. The material shows excellent removal efficiencies, independent from the presence of Ca2+ , Mg2+ or natural organic matter and only limited dependency on the presence of phosphate ions...
April 16, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29679886/cytotoxicity-of-novel-fluoride-solutions-and-their-influence-on-mineral-loss-from-enamel-exposed-to-a-streptococcus-mutans-biofilm
#8
Thiago Isidro Vieira, João Victor Frazão Câmara, Júlia Gabiroboertz Cardoso, Adílis Kalina Alexandria, Andréa Vaz Braga Pintor, Jaqueline Correia Villaça, Lúcio Mendes Cabral, Maria Teresa Villela Romanos, Andrea Fonseca-Gonçalves, Ana Maria Gondim Valença, Lucianne Cople Maia
OBJECTIVE: This study evaluated the cytotoxicity, antimicrobial activity and in vitro influence of new fluoridated nanocomplexes on dental demineralization. DESIGN: The nanocomplexes hydroxypropyl-β-cyclodextrin with 1% titanium tetrafluoride (TiF4 ) and γ-cyclodextrin with TiF4 were compared to a positive control (TiF4 ), a blank control (without treatment) and negative controls (hydroxypropyl-β-cyclodextrin, γ-cyclodextrin, deionized water), following 12- and 72-hour complexation periods...
April 13, 2018: Archives of Oral Biology
https://www.readbyqxmd.com/read/29679882/the-effect-of-resveratrol-on-glycation-and-oxidation-products-in-plasma-and-liver-of-chronic-methylglyoxal-treated-rats
#9
Zülbiye Yılmaz, Esra Betül Kalaz, A Fatih Aydın, Vakur Olgaç, Semra Doğru-Abbasoğlu, Müjdat Uysal, Necla Koçak-Toker
BACKGROUND: Methylglyoxal (MG) is a highly reactive dicarbonyl compound. It is produced by processes like glycolysis, glucose autooxidation, lipid peroxidation, and protein glycation. It is a major precursor of advanced glycation end products (AGE). It also exacerbates oxidative stress in the organism. Although there are some in vitro studies investigating the effect of resveratrol (RES) as an antioxidant and antiglycating agent on MG-induced toxicity, in vivo effect of RES is unknown...
December 19, 2017: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/29679876/coriariin-m-a-trimeric-hydrolysable-tannin-with-dehydrodigalloyl-and-valoneoyl-groups-as-linking-units-and-accompanying-dimeric-hydrolysable-tannins-from-coriaria-japonica
#10
Yuuki Shimozu, Takayasu Hirai, Tsutomu Hatano
Three oligomeric hydrolysable tannins, coriariins K, L, and M, which were previously undescribed, together with five known hydrolysable tannins were isolated from dried leaves of Coriaria japonica. Their structures were determined based on 1D and 2D NMR spectroscopy, HR-ESI-MS, and ECD spectroscopy experiments. Among the isolated compounds, coriariin M has a unique trimer structure where both dehydrodigalloyl and valoneoyl group linkages were found between the hydrolysable tannin monomers. Dimeric hydrolysable tannins coriariins K and L, having a dehydrodigalloyl group as the linking unit, were structurally related to coriariin A, the main hydrolysable tannin of this plant species...
April 18, 2018: Phytochemistry
https://www.readbyqxmd.com/read/29679869/characterization-of-adsorption-and-desorption-of-lawn-herbicide-siduron-in-heavy-metal-contaminated-soils
#11
Rong Jiang, Meie Wang, Weiping Chen
Siduron is a widely used herbicide in urban lawn and has been frequently detected in urban and suburban surface water. However, characteristics of its environmental behavior in soil are seldom reported. The combined pollution of heavy metals, especially for Cu, Pb, Cd, Zn and siduron would be common because of the widely existence of heavy metal pollution in urban soils. In this study, four soils with similar physicochemical properties but different levels of preexisting heavy metals were selected to investigate the adsorption and successive desorption of siduron using batch experiments...
April 9, 2018: Chemosphere
https://www.readbyqxmd.com/read/29679866/influence-of-humic-substances-on-iron-distribution-in-the-east-china-sea
#12
Han Su, Rujun Yang, Yan Li, Xuchen Wang
The influence of humic substances (specifically humic and fulvic acids, referred to as HS-HA and HS-FA) as well as other factors, such as major nutrient concentrations of total dissolved nitrogen (TDN), total dissolved phosphate (TDP) and hydrologic factors, on the distribution of total dissolved iron (DFe) and the chemical speciation of DFe was studied in the East China Sea (ECS) during a summer cruise in 2013. As the wide rage fraction of nature organic matter, the HS-HA, HS-FA in ESC contains most part of the organic ligand (Lt) of DFe...
April 9, 2018: Chemosphere
https://www.readbyqxmd.com/read/29679836/physical-immobility-as-a-sensitive-indicator-of-hydraulic-fracturing-fluid-toxicity-towards-daphnia-magna
#13
Tamzin A Blewett, Perrine L M Delompré, Chris N Glover, Greg G Goss
The process of extracting hydrocarbon resources by hydraulic fracturing is an increasingly utilised technique worldwide, resulting in an effluent called flowback and produced water (FPW). This effluent is a complex mixture of salts, metals and organic compounds, and has been shown to be highly toxic to aquatic biota, an effect attributed mainly to its salt and organic components. However, in the current study we show that the water flea, Daphnia magna, is physically impaired by, and rendered immobile at the surface of, test waters containing FPW...
April 18, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29679835/adsorption-mechanism-of-emerging-and-conventional-phenolic-compounds-on-graphene-oxide-nanoflakes-in-water
#14
Hepsiba Niruba Catherine, Ming-Han Ou, Basavaraju Manu, Yang-Hsin Shih
Emerging contaminants (ECs) such as bisphenol A (BPA), 4-nonylphenol (4-NP) and tetrabromobisphenol A (TBBPA) have gained immense attention worldwide due to their potential threat to humans and environment. Graphene oxide (GO) nanomaterial is considered as an important sorbent due to its exceptional range of environmental application owing to its unique properties. GO was also considered as one of ECs because of its potential hazard. The adsorption of organic contaminants such as phenolic ECs on GO affects the stability of GO nanoflakes in water and the fate of organic contaminants, which would cause further environmental risk...
April 18, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29679834/microeukaryotic-biogeography-in-the-typical-subtropical-coastal-waters-with-multiple-environmental-gradients
#15
Huajun Zhang, Xiaolin Huang, Lei Huang, Fangjian Bao, Shangling Xiong, Kai Wang, Demin Zhang
The determinants of microeukaryotic biogeography in coastal waters at a regional scale remain largely unclear. The coastal northern Zhejiang (in the East China Sea) is a typical subtropical marine ecosystem with multiple environmental gradients that has been extensively perturbed by anthropogenic activities. Thus, it is a valuable region to investigate the key drivers that shape microbial biogeography. We investigated microeukaryotic communities in surface waters from 115 stations in this region using 18S ribosomal RNA gene amplicon sequencing...
April 18, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29679829/fulfilling-spawning-flow-requirements-for-potamodromous-cyprinids-in-a-restored-river-segment
#16
Isabel Boavida, Joaquim B Jesus, Vítor Pereira, Cátia Santos, Marisa Lopes, Rui M V Cortes
The Baixo Sabor hydroelectric scheme was recently constructed (began operating in 2015), blocking fish migration immediately at the river mouth. As a compensation measure for spawning habitat loss the Vilariça River which confluences with Sabor River, immediately downstream from the Baixo Sabor scheme, was chosen for rehabilitation site as an attempt to replace the spawning grounds lost in Sabor River for the potamodromous cyprinid Iberian barbel (Luciobarbus bocagei). Restoration activities included: placement of submerged weirs with fish ramps to increase the lotic/lentic sequence, bank reinforcement, boulder placement and river water profile increase...
April 18, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29679825/technologies-for-the-management-of-msw-incineration-ashes-from-gas-cleaning-new-perspectives-on-recovery-of-secondary-raw-materials-and-circular-economy
#17
REVIEW
Margarida J Quina, Elza Bontempi, Anna Bogush, Stefan Schlumberger, Gisela Weibel, Roberto Braga, Valerio Funari, Jiri Hyks, Erik Rasmussen, Jakob Lederer
Environmental policies in the European Union focus on the prevention of hazardous waste and aim to mitigate its impact on human health and ecosystems. However, progress is promoting a shift in perspective from environmental impacts to resource recovery. Municipal solid waste incineration (MSWI) has been increasing in developed countries, thus the amount of air pollution control residues (APCr) and fly ashes (FA) have followed the same upward trend. APCr from MSWI is classified as hazardous waste in the List of Waste (LoW) and as an absolute entry (19 01 07*), but FA may be classified as a mirror entry (19 0 13*/19 01 14)...
April 17, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29679819/submarine-groundwater-discharge-and-chemical-behavior-of-tracers-in-laizhou-bay-china
#18
Yan Zhang, Hailong Li, Xuejing Wang, Chaoyue Wang, Kai Xiao, Wenjing Qu
Naturally occurring radon (222 Rn) and radium isotopes are widely used to trace water mixing and submarine groundwater discharge (SGD) in the coastal zones. However, their activities in groundwater are variable both spatially and temporally. Here, time series sampling of 222 Rn and radium was conducted to investigate their behavior in intertidal groundwater of Laizhou Bay, China. The result shows that groundwater redox conditions have an important impact on the behavior of tracers. The activities of tracers will decrease under oxidizing conditions and increase under reducing conditions...
April 18, 2018: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/29679817/a-survey-of-uranium-levels-in-urine-and-hair-of-people-living-in-a-coal-mining-area-in-yili-xinjiang-china
#19
Rehemanjiang Wufuer, Wenjuan Song, Daoyong Zhang, Xiangliang Pan, Geoffrey Michael Gadd
Recent reports have drawn attention to the uranium contamination arising from coal mining activities in the Yili region of Xinjiang, China due to the mixed distribution of uranium and coal mines, and some of the coal mines being associated with a high uranium content. In this study, we have collected water samples, solid samples such as soil, mud, coal, and coal ash, and hair and urine samples from local populations in order to evaluate the uranium level in this environment and its implications for humans in this high uranium coal mining area...
April 18, 2018: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/29679807/fish-sarcoplasmic-proteins-as-a-high-value-marine-material-for-wound-dressing-applications
#20
Sara Vieira, Albina R Franco, Emanuel M Fernandes, Sara Amorim, Helena Ferreira, Ricardo A Pires, Rui L Reis, Albino Martins, Nuno M Neves
Fish sarcoplasmic proteins (FSP) constitute around 25-30% of the total fish muscle protein. As the FSP are water soluble, FSP were isolated from fresh cod (Gadus morhua) by centrifugation. By SDS-PAGE, it was possible to determine the composition of FSP extracts (FSP-E). The FSP-E undergo denaturation at 44.12 ± 2.34° C, as characterized by differential scanning calorimetry thermograms (DSC). The secondary structure of FSP-E is mainly composed by α-helix structure, as determined by circular dichroism...
April 5, 2018: Colloids and Surfaces. B, Biointerfaces
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