Inorganic Ions
Mostrando 13-24 de 210 artigos, teses e dissertações.
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13. Effect of inorganic and organic depressants on the cationic flotation and surface charge of rhodonite-rhodochrosite
Abstract Silicates (rhodonite, tephroite, spessartine) and the carbonate (rhodochrosite) of manganese are of economic interest in silicate-carbonated manganese ores. The recovery of both mineral classes by flotation constitutes a challenge; rhodochrosite is a slightly soluble mineral that can release Mn2+ ions in pulp. In this work, the effects of inorganic
Rem: Rev. Esc. Minas. Publicado em: 2015-12
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14. Luminescent Terbium Doped Aluminate Particles: Properties and Surface Modification with Asparagine
New luminescent organic-inorganic hybrid particles based on Tb-doped aluminates and asparagine (Asn) surface modifiers were investigated. The Tb3+ doped inorganic core was obtained by spray pyrolysis, at 200 ºC γ-AlOOH (BOE:Tbx%) or at 700 ºC γ-Al2O3 (γTA:Tbx%). The reaction of Asn with boehmite in water disaggregated the sub-micronic boehmite particles
J. Braz. Chem. Soc.. Publicado em: 2015-12
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15. Bulk Atmospheric Deposition of Major Ions and Dissolved Organic Nitrogen in the Lower Course of a Tropical River Basin, Southern Bahia, Brazil
Major ionic constituents (Cl–, Na+, K+, Mg2+, Ca2+, NH4+, NO3–, SO42–) and dissolved organic nitrogen were determined, from September 2009 to January 2010, in bulk atmospheric deposition in the lower course of Cachoeira River, sou
J. Braz. Chem. Soc.. Publicado em: 2015-08
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16. Caffeine Oxidation in Water by Fenton and Fenton-Like Processes: Effects of Inorganic Anions and Ecotoxicological Evaluation on Aquatic Organisms
A degradação de cafeína pelo reagente de Fenton (Fe(II)/H2O2) e pelo reagente de Fenton modificado (Fe(III)/H2O2) foi investigada em água deionizada em uma concentração inicial de 5,2 μmol L-1 (1000 μg L-1). Esses dois processos de oxidação diferentes foram comparados e foi observado que u
J. Braz. Chem. Soc.. Publicado em: 2015-01
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17. Study on the adsorption of heavy metal ions from aqueous solution on modified SBA-15
Amino-functionalized SBA-15 mesoporous silica was prepared, characterized, and used as an adsorbent for heavy metal ions. The organic - inorganic hybrid material was obtained by a grafting procedure using SBA-15 silica with 3-aminopropyl-triethoxysilane and bis(2,4,4-trimethylpentyl) phosphinic acid (Cyanex 272), respectively. The structure and physicochemic
Mat. Res.. Publicado em: 05/04/2013
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18. Simultaneous incorporation of magnesium and carbonate in apatite: effect on physico-chemical properties
Synthetic apatites are widely used both in the dental and the orthopaedic fields due to their similarity in composition with the inorganic phase of hard tissues. Biologic apatites are not pure hydroxyapatite (HA), but are calcium-deficient apatites with magnesium and carbonate as minor but important substituents. The aim of the present study was to produce a
Mat. Res.. Publicado em: 02/04/2013
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19. Polímeros impressos com íons: fundamentos, estratégias de preparo e aplicações em química analítica
Chemical imprinting technology has been widely used as a valuable tool in selective recognition of a given target analyte (molecule or metal ion), yielding a notable advance in the development of new analytical protocols. Since their discovery, molecularly imprinted polymers (MIPs) have been extensively studied with excellent reviews published. However, stud
Quím. Nova. Publicado em: 2013
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20. Interference of inorganic ions on phenol degradation by the Fenton reaction
The addition of Cu2+ ions to the classical Fenton reaction (Fe2+ plus H2O2 at pH 3) is found to accelerate the degradation of organic compounds. This synergic effect causes an approximately 15 % additional reduction of the total organic carbon (TOC), representing an overall improvement of the efficiency of the mineralization of phenol. Although Fe2+ exhibits
Sci. agric. (Piracicaba, Braz.). Publicado em: 2012-12
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21. Otimização do processo de mineralização de compostos orgânicos utilizando sistemas eletro-Fenton e fotoeletro Fenton por irradiação UV artificial e solar
OPTIMIZATION OF THE MINERALIZATION PROCESS OF ORGANIC COMPOUNDS USING ELECTRO-FENTON AND PHOTO-FENTON SYSTEMS BY ARTIFICIAL AND SOLAR UV IRRADIATION Electrochemical advanced oxidation processes based on the Fentons reaction, such as electro-Fenton (EF) and photoelectro-Fenton (PEF) using artificial and solar UV irradiation were employed in the treatment of e
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/09/2011
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22. A influência do fósforo na toxicidade de cobre e composição bioquímica de Chlorella vulgaris
Metal toxicity to microalgae is dependent on environmental conditions, evolutionary history of the microalgae, and previous exposure of the organism to the specific metal. Also, it is importantly influenced by the physiological condition of the algae in the moment of metal exposure. In this research we investigated several combinations of phosphorus (P) and
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/09/2011
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23. Avaliação da expressão e localização da conexina 43 na injúria isquêmica renal aguda / Evaluation of Connexin 43 expression and localization in renal acute ischemic injury
The cells require contact with other cells and the extracellular matrix for tissue formation. Gap junctions are narrow channels connecting the cytoplasm of two adjacent cells, promoting the passage of inorganic ions, amino acids, nucleotides and other metabolites. These junctions are composed of two conexons or hemichannels, crossing the cell plasma membrane
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/06/2011
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24. Nano-Ceramic Inorganic Pigments Synthesis for Route Polymeric Precursors / Síntese de pigmentos cerâmicos inorgânicos nanométricos pela rota dos precursores poliméricos
Considerando a evolução tecnológica em constante crescimento e a necessidade de técnicas de produção na área de cerâmica que avancem em conjunto, buscou-se neste estudo, a pesquisa e desenvolvimento do método dos precursores poliméricos para obtenção de pigmentos cerâmicos inorgânicos. Método que proporciona qualidade a obtenção dos pós pre
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/02/2011