Copper(II) and nickel (II) complexation capacity of dissolved organic matter from rivers of agricultural and urban areas in the state of São Paulo

Author(s)

Tadini, Amanda M. ^[1] ; Campanha, Mariele B. ^[1] ; Moreira, Altair B. ^[1] ; Bisinoti, Marcia C. ^[1]

Affiliation

^[1] Univ Estadual Paulista Julio de Mesquita Filho UN, Inst Biociencias Letras & Ciencias Exatas, Dept Quim & Ciencias Ambientais, Lab Estudos Ciencias Ambientais, BR-15054000 Sao Jose Do Rio Preto, SP - Brazil

• Document type: Journal article
• Source: Journal of the Brazilian Chemical Society; v. 24, n. 11, p. 1789-1797, NOV 2013.
• Web of Science Citations: 2

Abstract

This study had as main objective to determine the complexing ability of the Organic Matter (OM) from typical agricultural areas and from urban areas with copper and nickel ions. The samples were collected during the dry and rainy seasons and were subjected to study the complexing capacity and OM conditional stability constant with Cu(II) and Ni(II) ions using a luminescence spectrofluorometer and tangential flow ultrafiltration system. The conditional stability constant values (log Kc) of OM with the copper ion varied from 0.04 to 1.35 with the highest value obtained for the place with the largest dissolved organic carbon (DOC 2.73-2.43 mg L-1) and the lowest for the smallest site DOC, corroborating the degree of aromaticity. We can conclude that the Dissolved Organic Matter (DOM) of the bodies of water in agricultural and urban areas contained a lower number of binding sites when compared with other locations. (AU)

• FAPESP's process: 11/00574-1 - Dynamics study of the glyphosate and phypronil pesticides and yours derivates in the Turvo/Grande watershed
• Grantee: Altair Benedito Moreira
• Support Opportunities: Regular Research Grants
• FAPESP's process: 10/09271-9 - Contamination evaluation and behavior of metals in sediments, fish tissue and surface water samples of rivers of the Turvo/Grande watershed
• Grantee: Márcia Cristina Bisinoti
• Support Opportunities: Regular Research Grants
• FAPESP's process: 10/13879-2 - Humic substances and chromium ions interaction and proposal of a labile organic matter indicator
• Grantee: Amanda Maria Tadini
• Support Opportunities: Scholarships in Brazil - Master
• FAPESP's process: 12/23066-4 - The role of aquatic humic substances on availability of toxic metal and a propose of a labile organic matter in aquatic environments
• Grantee: Márcia Cristina Bisinoti
• Support Opportunities: Regular Research Grants