Simultaneous DPAdSV for Heavy Metals Determination in the Seawater of a Former Bauxite Mining Area

Abstract

The widespread use of HMDE for multi-ionic analysis is mainly explained by the following factors: excellent reproducibility, due to the electrode surface ease of renewal, for preventing hysteresis; wide Ec; ability to forming amalgams with many redox-active metal ions; and (sub)nanomolar detection limits, which have unique capabilities for multi-metal determination. In this research, selectivity and sensitivity for Pb, Cd and Zn simultaneous determination, by DPAdSV, using HMDE as WE and CCA as a ligand, were tested. This method is based on the deposition of CCA-metals on Hg electrodes. The instrumental and chemical parameters that could improve measurements were obtained under optimal conditions, including: CCA concentration (0.05 mmol/L), pH (7), Edep (-0.3 V) tdep (60 s), AB concentration (0.5 mol/L), scan rate (150 mV/s), pulse height (80 mV), Hg drop size (4 mm 2 ) and linearity (Ip vs concentration), which was in the range from 5 to 170, 5 to 140 and 5 to 190 M, for Pb, Cd and Zn, respectively). The LOD (S/N = 3) values were 0.05, 0.03 and 0.05 µg/L for Pb, Cd and Zn, respectively. The repeatability and intermediate precisions were tested as RSD of 0.44, 1.21 and 1.23% for Pb, Cd and Zn, respectively. The recovery values were 98, 99 and 101% for Pb, Cd and Zn, respectively. As result, the DPAdSV method with CCA ligands was successfully applied for heavy metals determination in the seawater of a former bauxite mining area.

Bioaccumulation of Lead (Pb) in Green Mussels (Perna Viridis) in Indonesian Waters

“…According to [34](Wulandari et al, 2012) Shells with a larger size have a greater capacity to accumulate metal. Meanwhile, older green mussels can eliminate heavy metals better [35][36][37][38][39][40]. Heavy metal levels in green mussels decreased in concentration during the rainy season [17,[40][41][42].…”

Study of the Utilization of Heavy Metal Biosorption (Cr, Co, Cu, Fe, Cu, Mn, Ni) with Chitosan from Crab and Kupang Shell Waste

“…Pollution can be caused by shipwrecks, industrial discharges into waters, marine oil drilling processes, garbage disposal and pesticides from agriculture. Wastes tend to contain toxic chemicals and are harmful to the human body [1][2][3][4][5][6].…”

Heavy Metal Pollution in Indonesian Waters

“…The metals Cd, Pb, Hg, Fe, and Al are threats that must be watched out for for the health of organisms, and their widespread distribution must be a matter of common concern. [14][15][16][17][18].…”