Electroreduction of the antifouling agent TCMTB and its electroanalytical determination in tannery wastewaters.
The electrochemical reduction of antifouling agent 2-thiocyanomethylthiobenzothiazole (TCMTB) was investigated by cyclic and pulse differential voltammetry. The irreversible electrode reduction of TCMTB proceeded by ECEC reaction mechanism by two electrons transfer with one irreversible wave. Upon the basis of electrochemical evidence, the electrodic reaction mechanism was suggested to formation of mercaptobenzothiazole (MTB) in solution. Subsequently, a pulse differential method is described for the formation of TCMTB based on this electroreduction. Having been obtained a detection limit of 1.0 x 10(-7)mol L(-1) and recovery to 98% to concentration of 2.0 x 10(-6)mol L(-1). Therefore, the proposed method in this study is practical, sensitive and accurate for the analysis of TCMTB in tannery wastewater samples.
Meneses
Elaine S
ES
Laboratório de Química Ambiental, Departamento de Química, Universidade Federal de Sergipe, São Cristóvão-SE, Brazil.
Arguelho
Maria Lara P M
ML
Alves
José P H
JP