ChemInform Abstract: Multicomponent Click Synthesis of Potentially Biologically Active Triazoles Catalyzed by Copper Nanoparticles on Activated Carbon in Water.

ChemInform ◽  
2012 ◽  
Vol 43 (22) ◽  
pp. no-no
Author(s):  
Francisco Alonso ◽  
Yanina Moglie ◽  
Gabriel Radivoy ◽  
Miguel Yus
Keyword(s):  
Activated Carbon ◽  
Copper Nanoparticles ◽  
Biologically Active ◽  
Click Synthesis

scholarly journals Multicomponent Click Synthesis of 1,2,3-Triazoles from Epoxides in Water Catalyzed by Copper Nanoparticles on Activated Carbon

2011 ◽  
Vol 76 (20) ◽  
pp. 8394-8405 ◽  
Author(s):  
Francisco Alonso ◽  
Yanina Moglie ◽  
Gabriel Radivoy ◽  
Miguel Yus
Keyword(s):  
Activated Carbon ◽  
Copper Nanoparticles ◽  
Click Synthesis

Removal of algal taste and odour compounds by granular and biological activated carbon in full-scale water treatment plants

2018 ◽  
Vol 18 (5) ◽  
pp. 1531-1544 ◽  
Author(s):  
Aisha Faruqi ◽  
Milann Henderson ◽  
Rita K. Henderson ◽  
Richard Stuetz ◽  
Brendan Gladman ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Algal Blooms ◽  
Pilot Scale ◽  
Full Scale ◽  
Biologically Active ◽  
Removal Rates ◽  
Biological Activated Carbon ◽  
Treatment Processes ◽  
Water Treatment Plants ◽  
Service Life Modelling

Abstract The occurrence and severity of cyanobacterial and algal blooms in water supplies has been increasing due to the effects of eutrophication and climate change, resulting in more frequent taste and odour (T&O) events. Conventional treatment processes have been found to be inefficient in removing the two most commonly detected algal T&O compounds, geosmin and 2-methylisoborneol (MIB), though granular activated carbon (GAC) and biological activated carbon (BAC) contactors have achieved high T&O removal rates. Literature on the performance of GAC and BAC for T&O removal in full-scale treatment plants, however, is limited. This review collates and assesses pilot-scale and full-scale studies which focus on removal of geosmin and MIB, with the aim of understanding the factors which influence T&O removal and determining knowledge gaps in the use of GAC and BAC. Age and empty bed contact time (EBCT) were found to have a significant impact on GAC performance, with removal efficiency decreasing with increased age and increasing with longer EBCTs. BAC contactors have achieved higher removal rates than non-biologically active GAC contactors and were not impacted by age, EBCT and/or carbon type. From these observations, implementation of BAC for T&O removal would be favourable; however, further investigations are required to understand full-scale performance of BAC and service life modelling.

scholarly journals The Bacterial Communities of Full-Scale Biologically Active, Granular Activated Carbon Filters Are Stable and Diverse and Potentially Contain Novel Ammonia-Oxidizing Microorganisms

2015 ◽  
Vol 81 (19) ◽  
pp. 6864-6872 ◽  
Author(s):  
Timothy M. LaPara ◽  
Katheryn Hope Wilkinson ◽  
Jacqueline M. Strait ◽  
Raymond M. Hozalski ◽  
Michael J. Sadowksy ◽  
...  
Keyword(s):  
Activated Carbon ◽  
16S Rrna ◽  
16S Rrna Gene ◽  
Bacterial Communities ◽  
Granular Activated Carbon ◽  
Full Scale ◽  
Biologically Active ◽  
Rrna Gene ◽  
Ammonia Oxidizing Bacteria ◽  
Content Type

ABSTRACTThe bacterial community composition of the full-scale biologically active, granular activated carbon (BAC) filters operated at the St. Paul Regional Water Services (SPRWS) was investigated using Illumina MiSeq analysis of PCR-amplified 16S rRNA gene fragments. These bacterial communities were consistently diverse (Shannon index, >4.4; richness estimates, >1,500 unique operational taxonomic units [OTUs]) throughout the duration of the 12-month study period. In addition, only modest shifts in the quantities of individual bacterial populations were observed; of the 15 most prominent OTUs, the most highly variable population (aVariovoraxsp.) modulated less than 13-fold over time and less than 8-fold from filter to filter. The most prominent population in the profiles was aNitrospirasp., representing 13 to 21% of the community. Interestingly, very few of the known ammonia-oxidizing bacteria (AOB; <0.07%) and no ammonia-oxidizingArchaeawere detected in the profiles. Quantitative PCR ofamoAgenes, however, suggested that AOB were prominent in the bacterial communities (amoA/16S rRNA gene ratio, 1 to 10%). We conclude, therefore, that the BAC filters at the SPRWS potentially contained significant numbers of unidentified and novel ammonia-oxidizing microorganisms that possessamoAgenes similar to those of previously described AOB.

Activated carbon of Babassu coconut impregnated with copper nanoparticles by green synthesis for the removal of nitrate in aqueous solution

2017 ◽  
Vol 39 (15) ◽  
pp. 1994-2003 ◽  
Author(s):  
Rebecca Manesco Paixão ◽  
Isabela Maria Reck ◽  
Rosângela Bergamasco ◽  
Marcelo Fernandes Vieira ◽  
Angélica Marquetotti Salcedo Vieira
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Green Synthesis ◽  
Copper Nanoparticles

scholarly journals Peculiarities of Mineral Metabolism of Holstein Heifers’ Diet Supplemented with Copper Nanopowders

2020 ◽  
pp. 492-498
Author(s):  
Irina A. Stepanova ◽  
Anna A. Nazarova ◽  
Mikhail V. Arisov
Keyword(s):  
Treatment Group ◽  
Mineral Composition ◽  
Copper Nanoparticles ◽  
Mineral Metabolism ◽  
Biologically Active ◽  
Control Group ◽  
Experimental Animals ◽  
Animal Hair ◽  
Group A ◽  
Effect Of Copper

The current study aimed to investigate the effect of copper nanopowder on physiological and mineral metabolism indicators of Holstein cattle during the growth process of the animal. There were two experimental groups (control and treatment) and each one included seven Holstein heifers. From the first month of each heifer in the experimental group, a suspension of copper nanoparticles in a dose of 0.04 mg/kg was orally administered daily to the usual diet. The biologically active additive was administered to the animal’s diet at intervals. The weight of the animals was measured monthly, a clinical blood test was performed, the mineral composition of the blood was studied, the mineral composition of animal hair was also examined. The findings indicated a positive dynamics in the increase of body weight in the treatment group, compared to the control group. As a result of clinical blood tests, it was noted that the number of erythrocytes, the level of hemoglobin, and hematocrit increased in the experimental animals due to copper nanoparticles compared to these parameters in these animals at the beginning of the tests. Mineral analysis of blood samples in the treatment group presented an increase in the levels of copper, potassium, iron, zinc, and manganese while in animals of the control groups there was an increase in sodium, calcium, and phosphorus. According to the blood serum and hair analysis, copper in the nanodispersed state indicated antagonistic effects on boron, silicon, antimony, molybdenum of the treatment group and there was a synergist in aluminum, titanium, manganese, cobalt, iron, and potassium levels compared to the beginning of the experiment. The obtained results indicated that the addition of copper nanopowder to the diet of experimental animals increased the growth, stimulated the function of hematopoiesis, and improved the characteristics of mineral metabolism of the Holstein heifers.

Activated Carbon/MoO3: Efficient Catalyst for Green Synthesis of Chromeno[d]pyrimidinediones and Xanthenones

2020 ◽  
Vol 23 ◽  
Author(s):  
Niloofar Sabet Mehr ◽  
Shahrzad Abdolmohammadi ◽  
Maryam Afsharpour
Keyword(s):  
Activated Carbon ◽  
Room Temperature ◽  
Bulk Material ◽  
Biological Activities ◽  
Reaction Times ◽  
Aromatic Aldehydes ◽  
Biologically Active ◽  
Efficient Catalyst ◽  
Calcium Blockers ◽  
High Yields

Background: Nanoscale metal oxide catalysts have been extensively employed in organic reactions because they have been found to influence the chemical and physical properties of the bulk material. The chromene (benzopyran) nucleus constitutes the core structure in a major class of many biologically active compounds, and interest in their chemistry consequently continues because of their numerous biological activities. The xanthene (dibenzopyran) derivatives are classified as highly significant compounds which display a number of various bioactive properties. Pyrimidinones have also gained interest due to their remarkable biological utilization such as antiviral, antibacterial, antihypertensive, antitumor and calcium blockers effects. Objective: Our aim in the work presented herein was to prepare activated carbon/MoO3 nanocomposite and explore its role as a green and recyclable catalyst for the synthesis of chromeno[d]pyrimidinediones and xanthenones under ethanol-drop grinding at room temperature. Methods: The activated carbon/MoO3 nanocomposite was prepared successfully via a simple route in which carbonization of gums as new natural precursors was used for the synthesis of activated carbon. This nanocomposite was then effectively used in a reaction of 3,4- methylenedioxyphenol, aromatic aldehydes and active methylene compounds including 1,3-dimethylbarbituric acid and dimedone to synthesize a series of chromeno[d]pyrimidinediones and xanthenones in high yields. The synthesized catalyst was characterized by Fourier transform infrared spectroscopy (FT-IR), Powder x-ray diffractometry (XRD), Scanning electron microscope (SEM), Raman spectroscopy, and also by TGA analysis. Confirmation of the structures of compounds 5(a-g) and 6(a-g) were also established with IR, 1 H NMR and 13C NMR spectroscopic data and also by elemental analyses. Results: A number of 6,8-dimethyl-10-phenyl-6,10-dihydro-7H-[1,3]dioxolo[4΄,5΄:6,7]chromeno[2,3-d]pyrimidine-7,9(8H)-diones and 7,7- dimethyl-10-(4-methylphenyl)-6,7,8,10-tetrahydro-9H-[1,3]dioxolo[4,5-b]xanthen-9-ones were effectively synthesized using activated carbon/MoO3 nanocomposite (0.05 gr) as catalyst under ethanol-drop grinding at room temperature. The desired products were obtained in high yields (93-97%) within short reaction times (15-20 min). Conclusion: This paper investigates the catalytic potential of the synthesized activated carbon/MoO3 nanocomposite for the prepataion of chromeno[d]pyrimidinediones and xanthenones under ethanol-drop grinding procedure. The mildness of the reaction conditions, high yields of products, short reaction times, experimental simplicity, and avoid the use of harmful solvents or reagents makes this procedure preferable for the synthesis of these compounds.

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