Ferric Salts
Mostrando 1-12 de 30 artigos, teses e dissertações.
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1. Chemical precipitation optimization of phosphorus from domestic wastewater with a ferric salts as coagulant. / Otimização de processos de precipitação química na remoção de fósforo de esgotos sanitários mediante a utilização de sais de ferro como coagulante.
The aim of the present study was the chemical precipitation optimization of phosphorus from domestic wastewater with a ferric salt as coagulant. The organic matter removal and the sludge production obtained were analyzed. The study was developed with effluents from two wastewater plants from SABESP, such as ETE Barueri conventional activated sludge and ETE R
Publicado em: 2009
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2. Tratamento físico-químico de lixiviado de aterro sanitário pré-tratado por processo biológico aeróbio. / Physico-chemical treatment of landfill leachate from pre-treated by aerobic biological process.
Landfill leachates present high ammonia and organic matter concentrations, besides other pollutants, which do not allow its discharge to the environment without a previous treatment. Older landfill leachates, with more stabilized organic matter, present great pollutant potential, mainly due to the presence of recalcitrant substances that not often are remove
Publicado em: 2009
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3. Seleção de leveduras potencialmente produtoras de vitaminas do complexo B e estudo do processo fermentativo visando aplicação em alimentação animal / Screening of potential B-vitamin producer yeasts and the study of fermentation process for feed application
The present work had as the main the objective, the isolation and selection of potential B-vitamin producer yeast and the study of fermentative process for B-vitamin production for feed application. Among 267 isolated strains, one was selected as extracellular thiamine producer and the strain Candida sp. LEB 130 as riboflavin and biotin producer. In the stud
Publicado em: 2009
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4. Coagulation/precipitation of effluents from anaerobic expanded bed reactor and activated sludge system preceded by UASB reactor, with particle removal by sedimentation or flotation / Coagulação/precipitação de efluentes de reator anaeróbio de leito expandido e de sistema de lodo ativado precedido de reator UASB, com remoção de partículas por sedimentação ou flotação
The anaerobic reactors of modern conception (e.g., UASB and RALEx) remove from 65 to 75% of sanitary wastewater organic matter with relatively low construction, operation, and maintenance costs, in comparison with conventional aerobic processes. Nevertheless, that reactors are usually little efficient in nutrient removal and their effluents may present relat
Publicado em: 2006
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5. TRATAMENTO DE EFLUENTE DA PRODUÇÃO DE TRIFLURALINA POR OXIDAÇÃO-COAGULAÇÃO COM FERRATO DE POTÁSSIO E PROCESSOS FENTON COMBINADOS
The so called amination water (AW), an effluent stream from the industrial production of the trifluraline herbicide, toxic and recalcitrant to conventional treatments such as the microbiological, was submitted to a combined advanced process. For the degradation study of this effluent a recent, promising alternative was chosen - the potassium ferrate (K2FeO4)
Publicado em: 2006
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6. Reciclagem de poliolefinas por hidrocraqueamento
Although polyolefins can be recycled, they must be discarded after several uses. Polyolefin biodegradation is very slow, increasing the amount of plastic waste in the landfills. We have studied the recycling of PE (polyethylene) and PP (polypropylene) by hydrocracking. We have converted PE and PP into light hydrocarbons, which can be used as fuels after sepa
Publicado em: 1998
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7. Synthesis of an Iron-Oxidizing System during Growth of Thiobacillus ferrooxidans on Sulfur-Basal Salts Medium
It was found that the de novo synthesis of not only sulfur:ferric ion oxidoreductase (ferric ion-reducing system) but also iron oxidase was absolutely required when Thiobacillus ferrooxidans AP19-3 was grown on sulfur-salts medium. The results strongly suggest that iron oxidase is involved in sulfur oxidation. This bacterium could not grow on sulfur-salts me
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8. Recipe for Ferric Salts of Ethylenediaminetetraacetic Acid
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9. Failure of iron to promote attachment of gonococci to human spermatozoa under physiological conditions.
The effect of iron on the attachment of gonococci to human spermatozoa was investigated using the three iron salts, ferric chloride, ferric nitrate, and ammonium ferric citrate (AFC). Ferric chloride and ferric nitrate were found to be unsuitable for such studies because they were insoluble at physiological pH values, produced a marked decrease in the pH of
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10. The haemolytic activity of an iron carbohydrate complex
The haemolytic activity of iron-dextran complex is found to be a function of time, temperature, pH, and concentration. The lytic action is enhanced by small amounts of added ferrous sulphate. The lytic action is inhibited by chelating agents such as citrate and sequestrene salts, which bind ionic iron, but not by ferric citrate or ferric sequestrene which do
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11. Stimulatory effect of dihydroxyphenyl compounds on the aerotolerance of Spirillum volutans and Campylobacter fetus subspecies jejuni.
The aerotolerance of the microaerophilic bacterium Spirillum volutans was greatly stimulated in a defined medium by the presence of dihydroxyphenyl ferric iron-binding compounds such as nor-epinephrine at 10(-5) to 10(-6) M. Dihydroxyphenyl compounds at 2 X 10(-4) M, or iron salts (ferrous or ferric) at high concentration, greatly increased the aerotolerance
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12. Ferric Reduction Is a Potential Iron Acquisition Mechanism for Histoplasma capsulatum
For the fungus Histoplasma capsulatum, and for other microbial pathogens, iron is an essential nutrient. Iron sequestration in response to infection is a demonstrated host defense mechanism; thus, iron acquisition may be considered an important pathogenic determinant. H. capsulatum is known to secrete Fe(III)-binding hydroxamate siderophores, which is one co
American Society for Microbiology.