Organics Contaminants
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. o-DGT Devices for the Determination of Emerging Contaminants in Aqueous Matrices
Samplers based on the diffusive gradients in thin films for organics (o-DGT) were developed and applied in Brazilian aqueous matrices for the determination of four emerging contaminants (EC): 4-octylphenol, 4-nonylphenol, triclosan, and bisphenol A. The OASIS HLB resin used as the binding phase presented a high sorption capacity and the extraction associated
J. Braz. Chem. Soc.. Publicado em: 2021-01
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2. Serpentinites: Mineral Structure, Properties and Technological Applications
Serpentine is a versatile mineral family rich in Mg silicate with several polymorphic phases, mainly antigorite and lizardite, all of them with similar chemical composition (Mg3Si2O5(OH)4). Their structures are generally composed of octahedral layers rich in Mg[MgO2(OH)4]6- , attached to a tetrahedral silicate [Si2O5]2- sheet. The unique physicochemical prop
J. Braz. Chem. Soc.. Publicado em: 2020-01
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3. Enhanced Photocatalytic Activity of Pure Anatase Tio2 and Pt-Tio2 Nanoparticles Synthesized by Green Microwave Assisted Route
High-yield, rapid and facile synthesis of elongated pure anatase titania nanoparticles has been achieved through a nonaqueous microwave-based approach. The residual organics onto nanoparticles surfaces were completely removed through a new treatment under ozone flow, at room temperature in air. Such an ozone cleaning method revealed an effective inexpensive
Mat. Res.. Publicado em: 2015-06
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4. Copper on activated carbon for catalytic wet air oxidation
Textile industry is an important source of water contamination. Some of the organic contaminants cannot be eliminated by nature in a reasonable period. Heterogeneous catalytic wet air oxidation is one of the most effective methods to purify wastewater with organic contaminants. In this work, catalysts based on copper supported on activated carbon were synthe
Materials Research. Publicado em: 2009-03
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5. Treatment of the chromium-containing solid wastes from leather industry: use in adsorption process and as nitrogen source in agriculture. / Tratamento de rejeitos sÃlidos contendo cromo da indÃstria de couro: uso em processos de adsorÃÃo e como fonte de nitrogÃnio na agricultura.
The leather industry has a great economic importance for Brazil, however it is responsible for the generation of solid wastes containing chromium (sawdust and stripes of wet blue leather), which need suitable disposal for being classified as class 1 waste. The objectives of this work were to treat this waste for chromium removal and to use the resultant mate
Publicado em: 2007
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6. Selection of organic substances as references in toxicity tests with embryos of the oyster Crassostrea rhizophorae, Guilding, 1828 control of the analytic quality of ecotoxicological tests. / Seleção de substâncias orgânicas como referência em testes de toxicidade com embriões da ostra Crassostrea rhizophorae, Guilding, 1828: controle da qualidade analítica de testes ecotoxicológicos.
The degradation of the aquatic ecosystems in increasing over time, in all the coastal áreas, where countless anthropic activities generates a series of contaminants which, may cause adverse effects on the local biota. To evaluate those effects, toxicity tests are used with the objective of preventing and/or to minimize potential impacts in those ecosystems.
Publicado em: 2003
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7. Eletrochemical techniques for particulate system decontamination treatments. / Avaliação da técnica de eletroosmose na remoção de contaminante orgânico em meios particulados.
The use of electrochemical techniques is probably one of most promising technology for particulate system decontamination treatments. This methodology appears as able to remove heavy metals, radionucletides and organic and inorganic contaminations. By using an electric potential difference with low currents intensities through electrodes, the contaminants in
Publicado em: 2001
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8. Methodological Modifications for Accurate and Efficient Determination of Contaminant Biodegradation in Unsaturated Calcareous Soils
Many techniques for quantifying microbial biodegradation of 14C-labeled compounds use soil-water slurries and trap mineralization-derived 14CO2 in solution wells suspended within the incubation flasks. These methods are not satisfactory for studies of arid-region soils that are highly calcareous and unsaturated because (i) slurries do not simulate unsaturate