The effect of salinity on the release of copper (Cu), lead (Pb) and zinc (Zn) from tailing = Pengaruh salinitas terhadap pelarutan tembaga (Cu), timbal (Pb) ...
The effect of salinity on the release of copper (Cu), lead (Pb) and zinc (Zn) in tailing sediment have been studied by stripping voltammetry. The purpose of the research is to know the effect of salinity on the release of metals with certain pH, conductivity and variety of metals.
Simultaneous determination of copper, lead and zinc in tailing was done by Differential Pulse Anodic Stripping Voltammetry (DPASV) onto hanging mercury drop electrode (HMDE) and nitric acid 65% as support electrolyte. The limit of detection for this method 0.60 Lig/L, 0.150 !AWL and 0.238 Ltg/L for copper, lead and iMc respectively.
The stripping solution of 30 O/o. salinity with pH= 7.85, conductivity= 46.62 mS/cm gives the a mounts of dreleased metals as follows :14.867 pg/L Cu, 0.976 pg/L Pb and 6.224 pg/L Zn These results are higher as compared with the results from 15 °/00 salinity with pH= 7.66, conductivity= 23.22 mS/cm that give released metals of Cu= 7.988 Ag/L, Pb= 0.311 Lig& and Zn= 4.699 pg/L. the results from ANOVA suggest that this is due to different in salinity of the solution. It also found thet the conductivity does not give any effect. It can be concluded that the higher salinity will that give higher concentration or released metals.
Keywords: tailing, salinity and volammetr
