Arsenic Removal
Mostrando 1-12 de 16 artigos, teses e dissertações.
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1. ENHANCED REMOVAL OF PERSISTENT CONTAMINANTS AND TOXICITY REDUCTION THROUGH THE APPLICATION OF A TRIPLE-STAGE FENTON PROCESS TO SANITARY LANDFILL LEACHATES FROM YUCATAN, MEXICO
Sanitary landfill leachate (SLL) is a mixture of highly toxic and recalcitrant pollutants that threatens the water quality of the Yucatán Peninsula karst aquifer, one of the most extensive aquifers on the planet. To reduce the adverse environmental impacts of this wastewater, a triple-stage Fenton process (FP) was applied in an old SLL. Removal efficiencies
Química Nova. Publicado em: 2022
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2. Effectiveness of Arsenic Co-Precipitation with Fe-Al Hydroxides for Treatment of Contaminated Water
ABSTRACT Wastewater treatment is a challenging problem faced by the mining industry, especially when mine effluents include acid mine drainage with elevated arsenic levels. Iron (hydr)oxides are known to be effective in removal of As from wastewater, and although the resulting compounds are relatively unstable, the presence of structural Al enhances their st
Rev. Bras. Ciênc. Solo. Publicado em: 29/03/2018
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3. Study of the Adsorption of Arsenic (III and V) by Magnetite Nanoparticles Synthetized via AACVD
Globally, water pollution is mainly caused by the presence of heavy metals and metalloids such as arsenic. The majority of the techniques employed in the removal are of low efficiency and high cost. Therefore, in this work it is presented the adsorption processes of arsenic (As III and V) ions employing magnetite nanoparticles (MNPs) synthesized by the aeros
Mat. Res.. Publicado em: 08/12/2016
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4. EVALUATING ARSENIC AND MANGANESE REMOVAL FROM WATER BY CHLORINE OXIDATION FOLLOWED BY CLARIFICATION
AbstractThis paper investigates the simultaneous removal of arsenic [As(V) or As(III)] and manganese [Mn(II)] from natural waters of low and high turbidity by clarification (with polyaluminum chloride and aluminum sulfate as primary coagulants) associated or not with chlorine pre-oxidation. The results showed that the clarification process exhibited low Mn(I
Braz. J. Chem. Eng.. Publicado em: 2015-06
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5. Remoção de mercúrio e arsênio em cação-azul, Prionace glauca / Mercury and arsenic removal in blue-shark, Prionace glauca
Os cações são importantes recursos pesqueiros que podem apresentar concentrações de mercúrio (Hg) e arsênio (As) muitas vezes acima do limite de tolerância, o que os tornam impróprios como alimento. No meio aquático estes contaminantes são convertidos em espécies orgânicas, em especial metilmercúrio (MeHg) e arsenobetaína (AB), respectivamente
Publicado em: 2010
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6. FitorremediaÃÃo de arsÃnio: disponibilidade do metalÃide no solo e seu acÃmulo em girassol e mamona. / Arsenic phytoremediation: metalloid forms in soils and its accumulation in plants.
The increasing accumulation of arsenic (As) in soils and water bodies has caused increasing concern about human and animal exposure to this metalloid in the environment. As a result, studies assessing the bioavailability of arsenic by different soil extractants and the effect of phosphorus (P) upon this metalloidâs availability, combined with research compa
Publicado em: 2009
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7. Fotocatálise heterogênea com TiO2 para oxidação de arsênio e sua remoção de águas por coprecipitação com sulfato férrico
The oxidation of arsenic (As(III) to As(V)) in water samples was performed by heterogeneous photocatalysis using a TiO2 film immobilized inside a photochemical reactor. After oxidation, As(V) was removed from the water samples by coprecipitation with ferric sulfate. The final conditions of oxidation and arsenic removal (TiO2 film prepared with a suspension:
Química Nova. Publicado em: 2009
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8. MACRÓFITAS AQUÁTICAS EM TRATAMENTO DE ÁGUAS CONTAMINADAS POR ARSÊNIO. / MACRÓFITAS AQUÁTICAS EM TRATAMENTO DE ÁGUAS CONTAMINADAS POR ARSÊNIO.
The pollution of waters for arsenic, and composites: organic, fosfatados and nitrogenados is one of the biggest problems of the modern world. The fitorremediação has been used, in the search of vegetal species with potential for the removal of these composites. In this intention, species of macrófitas had been placed in presence of Arsenio in nutritional
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/09/2008
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9. Fotocatálise heterogênea na oxidação de arsênio e sua remoção de águas da região do Quadrilátero Ferrífero - MG / Heterogeneous photocatalysis in oxidation the arsenic and its removal of waters in the Quadrilátero Ferrífero - MG region
A contaminação por arsênio em águas tem sido reportada em várias partes do mundo. O elemento pode ser encontrado sob as formas orgânicas e inorgânicas. As espécies de As(III) e As (V) são os de maiores toxicidade e riscos à saúde, comparada às espécies orgânicas. Atualmente, a concentração máxima permitida de arsênio em água potável é de
Publicado em: 2007
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10. INVESTIGAÇÃO SOBRE A FORMAÇÃO DE ESPÉCIES DE ARSÊNIO ORGÂNICO EM SOLUÇÕES DE NUTRIÇÃO PARENTERAL
Parenteral nutrition is the nutrients administration by intravenous mean in patients who cannot consume them for gastrointestinal way. Parenteral Nutrition Solutions are stored in glass and plastic containers, being the glass the most used due to its rigid structure, chemical resistance, sterilization easiness and transparency. Among glass constituents is th
Publicado em: 2006
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11. Potencial of macrophytes to remove arsenic and atrazine from water solution / Potencial de macrófitas para remoção de arsênio e atrazine em solução aquosa
The potential of three aquatic plants: Azolla caroliniana, Salvinia minima and Lemna gibba was evaluated, in this study, in order to select plants to be used in phytoremediation of water polluted by arsenic (As) and atrazine. The experiments were carried out in a green house, during six days, using vases containing Hoagland solution ( of ionic force), in the
Publicado em: 2006
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12. Sorption kinetics and intrapaticulate diffusivity of As(III) bioremediation from aqueous solution, using modified and unmodified coconut fiber
The pollution and toxicity problems posed by arsenic in the environment have long been established. Hence, the removal and recovery remedies have been sought, bearing in mind the efficiency, cost effectiveness and environmental friendliness of the methods employed. The sorption kinetics and intraparticulate diffusivity of As (III) bioremediation from aqueous
Eclética Química. Publicado em: 2006