Redox properties of organic material present in ultrafiltrated water samples taken from the Paraíba do Sul river, Brazil

Química Nova

Canellas, Luciano Pasqualoto¹  Baldotto, Marihus Altoé¹  Rosa, Raul Castro Carriello¹  Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes, Brasil¹  Canela, Maria Cristina¹  Velloso, Ary Carlos Xavier¹  Rezende, Carlos Eduardo¹  Maciel, Marcelo dos Santos¹ 

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

DOI  :  10.1590/S0100-40422009000400012

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 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 MOOx, MORed 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】

Unknown