Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/98352
Type: Artigo de periódico
Title: The Role Of Cupric Ions In The Generation Of Superoxide In Natural Waters
Author: Jardim W.F.
Solda M.I.
Gimenez S.M.N.
Abstract: Photochemical generation of superoxide ions (O2 {circled division slash}) in water bodies has been associated with both synthetic and naturally occurring organic compounds. Indirect superoxide measurements are usually made by determining the concentration of hydrogen peroxide (as a product of superoxide dismutation), or by measuring the amount of nitrite produced when superoxide oxidizes hydroxylamine. We have collected evidence that, under alkaline conditions, cupric ions generate superoxide in natural waters by a very sensitive catalytic reaction. This reaction is enhanced by hydroxyl and borate ions. Strong natural and synthetic ligands inhibit the reaction, suggesting that only free or hydrolyzed species are involved. Copper speciation studies were performed using this technique. These results bring a new parameter for evaluating copper toxicity to the aquatic biota, i.e. the toxicity via superoxide ions. © 1986.
Editor: 
Rights: fechado
Identifier DOI: 10.1016/0048-9697(86)90074-4
Address: http://www.scopus.com/inward/record.url?eid=2-s2.0-0022968183&partnerID=40&md5=bb4bd59de892cae9abbff220d8087577
Date Issue: 1986
Appears in Collections:Unicamp - Artigos e Outros Documentos

Files in This Item:
File SizeFormat 
2-s2.0-0022968183.pdf328.1 kBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.