Recalcitrant Organic Compounds
Mostrando 1-12 de 23 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. The stimulating effects of the addition of glucose on denitrification and removal of recalcitrant organic compounds
A laboratory scale aerobic oxidation ditch combined with an anoxic reactor was conducted to treat wastewater from a chemical industrial park in Tianjin, China. The wastewater exhibited a low biodegradability, and the results of gas chromatography mass spectrometry (GC-MS) analysis showed that some recalcitrant organic components are present in the wastewater
Braz. J. Chem. Eng.. Publicado em: 2014-03
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3. Anaerobic treatment of cellulose bleach plant wastewater: chlorinated organics and genotoxicity removal
This study assessed the removal efficiency of organic matter and how it relates to the decrease of toxic and mutagenic effects when an anaerobic reactor is used to treat the bleaching effluent from two kraft pulp mills. Parameters such as COD (chemical oxygen demand), DOC (dissolved organic carbon), AOX (adsorbable organic halogen), ASL (acid soluble lignin)
Brazilian Journal of Chemical Engineering. Publicado em: 2011-12
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4. Avaliação do tratamento de lixiviado de aterro sanitário através de processo oxidativo avançado conjugado com sistema de separação por membranas
The landfill leachate is characterized by high recalcitrant organic matter concentration, ammonia and toxic compounds. This effluent can be an environmental problem due to its high pollutant potential when it is released without treatment. Studies reported in the literature showed that biological processes are not sufficient in meeting the discharge standard
Publicado em: 2010
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5. CEFALOSPORINAS E SURFACTANTE NÃO-IÔNICO EM EFLUENTE HOSPITALAR: DETERMINAÇÃO, DEGRADAÇÃO POR MEIO DE FOTÓLISE E ELETROCOAGULAÇÃO E IDENTIFICAÇÃO DE SUBPRODUTOS E METABÓLITOS / CEFALOSPORINS AND NON IONIC SURFACTANTS IN HOSPITAL WASTEWATER: DETERMINATION, DEGRADATION BY MEANS OF PHOTOLYSIS AND ELECTROCOAGULATION AND IDENTIFICATION OF BYPRODUCTS AND METABOLITES
The currently incorrect and excessive consumption of pharmaceuticals and surfactants, mainly domestic usage, has become a concern to the scientific community around the world, due to the environmental consequences with regard to the bacterial resistance (characteristic of antibiotics), and alteration of hormonal systems (provoked by the degradation products
Publicado em: 2009
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6. Integração entre os processos foto Fenton e lodo ativado no tratamento de efluentes contendo compostos orgânicos recalcitrantes. / Integration of photo-Fenton and activated sludge processes on the treatment of wastewater containing recalcitrant organic compounds.
O Fenol e compostos fenolicos foram classificados como poluentes primarios pela Environmental Protection Agency (EPA USA). Eles sao geralmente encontrados em efluentes industriais como: poupa e papel; madeireiras; plasticos e polimeros sinteticos; farmaceuticos, pesticidas, oleo e petroquimicas. Os tratamentos de agua convencionais tem mostrado ineficiencia
Publicado em: 2008
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7. Transferência do carbono de resíduos da colheita de eucalipto para frações da matéria orgânica do solo / Carbon transference from eucalypt harvest residues to soil organic matter fractions
Eucalypt plantation areas in Brazil have increased continuously over the years. The practice of removing more lignified material, such as bark and branches, from the ground after wood harvesting in eucalypt forests may prevent the stabilization of carbon (C) in recalcitrant fractions of soil organic matter (SOM). The recalcitrance of such organic fractions i
Publicado em: 2008
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8. Estudo da evaporaÃÃo de lixiviados de aterros sanitÃrios como alternativa tecnolÃgica de tratamento: testes em bancada
The leachate from landfill contains high pollution load and its composition gives large amounts of ammonia, chlorides, recalcitrant substances, organic and inorganic compounds. Such waste can cause negative effects on the environment and interfere with the performance of biological processes for their degradation. The choice of technology appropriate treatme
Publicado em: 2008
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9. CONCEPÇÃO, CONSTRUÇÃO E AVALIAÇÃO DE FOTORREATORES CATALISADOS NA DEGRADAÇÃO DE CARGA POLUENTE E AMOXICILINA EM EFLUENTE HOSPITALAR
The focus of this study was the application of advanced oxidation photoprocesses, heterogeneous photocatalysis and photo-Fenton, in the degradation of pollutant load and amoxicillin in wastewater from the University Hospital of Santa Maria (HUSM), evaluating the photoreactors performance in the degradation efficiency. In the hospital wastewater there is a wi
Publicado em: 2008
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10. Termodecomposição, estudos de carbonização e silicificação da matéria orgânica e corpos silicosos em ecossistemas terrestres no Brasil e na Antártica / Thermodecomposition, organic matter carbonization silicification studies and silica bodies in terrestrial ecosystems in Brazil and Antarctica
Soil organic matter (SOM) is highly heterogeneous in composition, which consists of components as different from each other as labile carbohydrates and recalcitrant aliphatic compounds. Mean residence time (MRT) of the various compounds comprising soil organic matter may range from a few minutes to thousands of years. This wide range is partly due to the soi
Publicado em: 2007
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11. Environmental factors influence evaluation on the structure, dynamics and optical properties of the aquatic humic substances form the "Rio Negro" - Amazonas / Avaliação da influência de fatores ambientais na estrutura, dinâmica e propriedades ópticas das substâncias húmicas aquáticas do Rio Negro
Nowadays, one of the major world concerning is focused in the increasing of the damaging ultraviolet (UV) radiation and its impact on the aquatic ecosystems. In addition, the Rio Negro, one of the principal tributaries of the Amazon Basin, is an appropriate site for studying the influence of the UV radiation in the dissolved organic matter (DOM) biogeochemis
Publicado em: 2007
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12. Uso de ozônio como pré e pós-tratamento de efluentes da indústria de celulose kraft branqueada / Pre and post ozone treatment of bleached kraft pulp mill effluents
This work evaluated the combination of ozone and activated sludge for treatment of bleached kraft pulp effluents. Ozonation was done before and after biological treatment. First the influence of pH, temperature and hydrogen peroxide dose on ozonation was assessed in order to optimize treatment efficiency, which was evaluated in terms of COD, BOD5, lignin, bi
Publicado em: 2006