Propriedades redox da matéria orgânica isolada de material ultrafiltrado das águas do rio Paraíba do Sul

Química Nova

Marihus Altoé Baldotto²  Luciano Pasqualoto Canellas²  Ary Carlos Xavier Velloso²  Raul Castro Carriello Rosa¹  Marcelo Dos Santos Maciel¹  Carlos Eduardo Rezende¹  Maria Cristina Canela¹ 

[1] ,Universidade Estadual do Norte Fluminense Darcy Ribeiro Centro de Ciências e Tecnologias Agropecuárias Laboratório de SolosCampos dos Goytacazes RJ ,Brasil

关键词: redox potential;    oxidation capacity;    ultra-filtration;   

DOI  :  10.1590/S0100-40422009000400012

来源: SciELO

【 摘 要 】

Previous studies indicated that free radicals control organic matter redox activities. In the present study, organic matter of an ultra-filtrated material collected from seven samples taken seasonally from the Paraiba do Sul River for two years were titrated with an oxidizer (I2) in an inert atmosphere. Standard formal potential values for the electrode MO Ox, MO Red ranged from 0.754 to 0.786 V at a 25 ºC temperature. Organic matter oxidation capacity (COx) per carbon mass varied according to pH values, and changes in COx were related to rainfall and river flow intensities.

【 授权许可】

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