Influence of dissolved sulfides on copper complexation in surface waters using voltammetric methods

Quimica nova

Scheffer, Elizabeth W. O.¹  Grassi, Marco T.² 

[1] Universidade Estadual de Ponta Grossa, Ponta Grossa, Brasil;Universidade Federal do Paraná, Curitiba, Brasil

关键词: sulfide;    copper speciation;    square wave voltammetry.;   

DOI  :  10.1590/S0100-40422010000600006

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

In this work asulfide quantification protocol using voltammetric methods was developed toevaluate the effect of dissolved sulfides on copper complexation. On the basisof pH, sulfide release from the dissociation of specific metal sulfide complexescan be electrochemically measured and then removed (as H2S) by aN2 purge. Cathodic stripping square wave voltammetry (CSSWV) wasconducted to quantify Cu sulfides complexes which dissociate at pH < 5.0during the process of acid titration.

【 授权许可】

CC BY