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

Química Nova

Universidade Estadual de Ponta Grossa, Ponta Grossa, Brasil¹  Universidade Federal do Paraná, Curitiba, Brasil¹  Grassi, Marco T.¹  Scheffer, Elizabeth W. O.¹ 

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 a sulfide quantification protocol using voltammetric methods was developed to evaluate the effect of dissolved sulfides on copper complexation. On the basis of pH, sulfide release from the dissociation of specific metal sulfide complexes can be electrochemically measured and then removed (as H2S) by a N2 purge. Cathodic stripping square wave voltammetry (CSSWV) was conducted to quantify Cu sulfides complexes which dissociate at pH < 5.0 during the process of acid titration.

【 授权许可】

Unknown