Dissolved And Labile Fractions
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. Labile copper and zinc fractions under different salinity conditions in a shipyard area in the patos lagoon estuary, south of Brazil
Copper and zinc are common elements in paint residues and can be toxic to estuarine organisms. This study aims to determine the labile dissolved and labile particulate fractions (LPFs) of copper and zinc in the estuarine waters of a shipyard in southern Brazil under different salinity levels and in different seasons. The labile dissolved fraction was determi
Quím. Nova. Publicado em: 2013
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2. Análise de especiação de cobre e zinco empregando voltametria de redissolução anódica com pulso diferencial
This work describes methodologies for speciation analysis of the metals copper and zinc as total, total dissolved, labile, as well as complexation capacity (conditional stability constants and available ligand concentration), using the same technique, differential pulse anodic stripping voltammetry (DPASV). Several supporting electrolytes were tested, and th
Química Nova. Publicado em: 2012
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3. Determinação de metais na bacia do rio Piracicaba usando as técnicas de Difusão em Filmes Finos por Gradiente de Concentração (DGT) e Fluorescência de Raios X Dispersiva em Energia (EDXRF) e por Reflexão Total (TXRF) / Determination of metals in Piracicaba river basin using Diffusive Gradients in Thin Films, and Energy Dispersive X-ray Fluorescence (EDXRF) and Total Reflection (TXRF) techniques
O desenvolvimento e aplicação de métodos analíticos na avaliação das concentrações de metais nas frações dissolvida e lábil na bacia do rio Piracicaba são de relevante importância para o estudo do comportamento químico-ambiental desses metais e para seu monitoramento, devido ao impacto das atividades antropogênicas nessa bacia. A técnica de d
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/09/2011
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4. Aspectos cinéticos da degradação aeróbia e anaeróbia de Cyperus giganteus, Eichhornia azurea e Egeria najas da lagoa do Óleo (Estação Ecológica de Jataí, Luiz Antônio, SP)
This study aimed to assess the effects of temperature on different aspects of aerobic and anaerobic degradation of aquatic macrophytes from different ecological groups: Cyperus giganteus (emergent), Eichhornia azurea (fixed floating) and Egeria najas (submerged). Considering these purposes, the carbon balance and mass decay, the cellulase and peroxidase acti
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/06/2011
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5. DEVELOPMENT AND VALIDATION OF VOLTAMMETRIC METHOD FOR DETERMINATION OF IRON AND ITS CHEMICAL SPECIATION IN PORE WATER TO SEDIMENT OF THE PATOS LAGOON-RS / DESENVOLVIMENTO E VALIDAÇÃO DE MÉTODO VOLTAMÉTRICO PARA DETERMINAÇÃO DE FERRO E SUA ESPECIAÇÃO QUÍMICA EM ÁGUA INTERSTICIAL NO SEDIMENTO DA LAGOA DOS PATOS-RS
Sediments can act as accumulators as well as sources of pollutants. Depending on the port activities are in local growth rate by expanding the port of Rio Grande (RS), studies that show the location of the site investigation is important to predict the intake of iron in this environment. In this work, the chemical speciation of iron and measuring the concent
Publicado em: 2010
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6. 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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7. Estudo da participação de metais traço em uma linha d`água de um tanque de cultivo de camarão marinho do município de Santa Rita-PB
Brazil, it is nowadays, is one of the main producing of sea shrimp of the world. Due to this position, necessary that is done there are discussions that relates this activity to the environmental preservation, aiming avoid, among others problems, irreparable damages to the mangroves ecosystem and modification in the water quality of the rivers that receive e
Publicado em: 2006
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8. Atividade enzimática, cinética e modelagem matemática da decomposição de Ultricularia breviscapa da lagoa do Óleo (Estação Ecológica de Jataí, Luiz Antônio - SP).
This work approached the enzymatic activities, kinetics and mathematical modeling of the decomposition of Utricularia breviscapa from leo lagoon (21 36 S and 47 49 W), Luiz Antonio, SP. The experiments described the decomposition in function of temperature, availability of oxygen and carbon source. Samples of this macrophyte and water were collected in the o
Publicado em: 2003
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9. Decomposição de Staurastrum iversenii Neygaard var. americanum: efeitos da qualidade do recurso, da disponibilidade de oxigênio e da temperatura.
In this work the decomposition aspects of the Staurastrum iversenii Nygaard var. americanum phytoplankton species, isolated from the Barra Bonita Reservoir (22 degrees 29 minutes S e 48 degrees 34 minutes W), were approached; as resource of the decomposition were used: cells (ruptured and whole) and polysaccharide of higher and lower molecular masses. Were a
Publicado em: 2002