Estudo da capacidade de complexação e sua relação com algumas variáveis ambientais em cinco represas do Rio Tietê/Brasil
| Autor: | Elisangela C. L. Borges, Eduardo Fausto Almeida Neves, Waldomiro Borges Neto, José Mauro Bezerra, Antonio A. Mozeto |
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| Jazyk: | portugalština |
| Rok vydání: | 2007 |
| Předmět: |
Total organic carbon
chemistry.chemical_classification Cadmium Sulfide Stereochemistry Conditional stability Equilibrium conditions chemistry.chemical_element General Chemistry complexation and adsorption capacities Copper Metal chemistry.chemical_compound chemistry Sodium nitrate visual_art visual_art.visual_art_medium ion-selective electrodes Chemometrics Nuclear chemistry |
| Zdroj: | Química Nova v.30 n.7 2007 Química Nova Sociedade Brasileira de Química (SBQ) instacron:SBQ Química Nova, Volume: 30, Issue: 7, Pages: 1505-1511, Published: 2007 |
| Popis: | The copper and cadmium complexation properties in natural sediment suspensions of reservoirs of the Tietê River were studied using the solid membrane copper and cadmium ion-selective electrodes. The complexation and the average conditional stability constants were determined under equilibrium conditions at pH=6.00 ± 0.05 in a medium of 1.0 mol L-1 sodium nitrate, using the Scatchard method. The copper and cadmium electrodes presented Nernstian behavior from 1x10-6 to 1x10-3 mol L-1 of total metal concentration. Scatchard graphs suggest two classes of binding sites for both metals. A multivariate study was done to correlate the reservoirs and the variables: complexation properties, size, total organic carbon, volatile acid sulfide, E II and pH. |
| Databáze: | OpenAIRE |
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