Work

An anodic stripping voltammetric approach for total mercury determination in sea sponges from the Niger Delta region of Nigeria

Year: 2024

Type: article

Abstract: Mercury pollution from ongoing crude oil refining and waste disposal activities threatens aquatic ecosystems and human health in the Niger Delta. Mercury monitoring exercise in this region is challenging due to the high cost of traditional instruments and the complexity of marine samples. This research presents a novel analytical method using differential pulse anodic stripping voltammetry (DPASV) with a glassy carbon electrode (GCE) to determine mercury levels in sea sponges from the Niger Delta. Using a 2.36 M HCl + 2.4 M NaCl supporting electrolyte, −0.6 V deposition potential, and 300 s deposition time, average mercury levels were found to be 0.98 mg kg −1 , 0.63 mg kg −1 and 0.42 mg kg −1 for Ibiotirem, Kaa and Samanga, respectively. The result showed that the Niger Delta is polluted, and remediation efforts are necessary. Furthermore, the DPASV method could be used for routine mercury monitoring as it is cost-effective, user-friendly, and highly sensitive. • New DPASV method for mercury detection in Niger Delta sea sponges developed • Sea sponges are excellent bio-monitors of mercury pollution. • DPASV method matches ICP-OES accuracy, offering a cost-effective alternative. • Mercury levels in Niger Delta exceed permissible limits, raising health concerns.

Source: Marine Pollution Bulletin

DOI: 10.1016/j.marpolbul.2024.117008

Authors: N.U. Sunday, K.C. Honeychurch, L. Newton, R.U. Chidugu-Ogborigbo

Institution: University of the West of England

Language: English

Topic: Electrochemical Analysis and Applications

Subfield: Electrochemistry

Field: Chemistry

Domain: Physical Sciences

SDGs: Life below water, Clean water and sanitation

Open Access status: hybrid

Estimated APC paid: $3,630