Sulphite Process
Mostrando 1-5 de 5 artigos, teses e dissertações.
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1. Sistemas de análises químicas em fluxo explorando mecanismos de re-alimentação, calibração multivariada e outras abordagens para melhoria em desempenho / Flow systems exploiting feed-back mechanisms, multivariate calibration and other strategies for improving the analytical performance
Studies focusing on performance of intelligent analytical flow systems, association with multivariate calibration or use of nanocrystals as sensitizers were carried out. Moreover, improvements related to modifications in flow pattern were evaluated with emphasis to in-line dialysis. To this end, a strategy for implementing simultaneous determinations of iron
Publicado em: 2010
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2. Sodium lignosulphonate as agent of modification of lignocellulosic fiber surface and formulation of phenolic thermoset / Lignosulfonato de sódio como agente de modificação da superfície de fibras lignocelulósicas e da formulação de termorrígido fenólico
Due to the great current interest in biocomposites because of both the use of lignocellulosic fibers as reinforcers of polymer matrices and the production of matrices prepared from renewable raw material, this study has sought to improve the properties of phenolic thermosets using sodium lignosulphonate as a macromonomer, and the insertion of sisal fibers, e
Publicado em: 2010
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3. Low molecular weight lignosulfonates recovery by nanofiltration / Estudo da recuperação de lignossulfonatos de baixa massa molar por nanofiltração
Membrane separation processes like ultrafiltration (UF) and nanofiltration (NF) are used in the pulp and paper industry to the recovery of several species present in the wood digest waste that are interesting to other applications as lignin, sugars and specially lignosulfonates, improving the recirculation of the water in the pulping process and the reductio
Publicado em: 2007
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4. Oxidation of sodium metabisulphite containing in the wastewater of the shrimp farming / Estudo da oxidação do metabissulfito de sódio contido no efluente da carcinicultura
The shrimp farming is a process of creation of shrimp that has been growing rapidly in the country, occupying a meaningful space in the Brazilian exporting. In 2003, this activity presented a volume of 60 millions of tons and 220 millions of dollars, being the main generator of employment and income of the primary sector of the northeast economy. However, it
Publicado em: 2005
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5. Reduction of chromium (VI) by the indirect action of Thiobacillus thioparus
The microbial reduction of chromium(VI) to chromium(III) has been one of the most widely studied forms of metal bioremediation. Recently, we have found that Thiobacillus ferrooxidans and Thiobacillus thiooxidans, growing on elemental sulphur, can indirectly promote chromium(VI) reduction by producing reducing agents such as sulphite and thiosulphate, which a
Brazilian Journal of Chemical Engineering. Publicado em: 2003-03