1Marine Science Study Program, Faculty of Agriculture, Fisheries and Marine, Universitas Bangka Belitung, Indonesia
2Capture Fisheries Study Program, Faculty of Agriculture, Fisheries and Marine, Universitas Bangka Belitung, Indonesia
3Biology Study Program, Faculty of Science and Engineering, Universitas Bangka Belitung, Indonesia
BibTex Citation Data :
@article{JKT30718, author = {Mohammad Nugraha and Indra Ambalika Syari and Agung Priyambada and Budi Afriyansyah}, title = {Multi-Index Geochemical Evaluation of Cd, Pb, Cu, and Zn in Ketugar Island Marine Conservation Area, Indonesia}, journal = {Jurnal Kelautan Tropis}, volume = {29}, number = {3}, year = {2026}, keywords = {Grain Size; Organic Matter; Heavy Metals; Ketugar Island}, abstract = { Ketugar Island, a coral reef conservation area on the eastern coast of Bangka Island, is potentially exposed to sedimentation and heavy metal inputs from tin mining. This research aims to evaluate the contamination levels and potential ecological risks associated with heavy metals in the sediments of the waters surrounding Ketugar Island. Heavy metal concentrations (Cd 0.09–0.16 mg/kg, Pb 0.80–3.04 mg/kg, Cu 0.07–0.10 mg/kg, and Zn 1.37–1.94 mg/kg) in surface sediments around Ketugar Island remain below the ANZECC/ARMCANZ SQGV thresholds, this is confirmed by SQG-Q, CF, Igeo, PLI, and RI indices, all of which indicate unpolluted conditions or low risk. This status is attributed to limited anthropogenic input of tin tailings due to the distance from the source and strong hydrodynamic dispersion in the open waters. Variations in sediment grain size with fine fractions dominating low energy stations on the southeastern side (KT-1, KT-2) and coarse fractions dominating the northwestern side exposed to strong monsoon currents (KT-3, KT-4) govern the distribution of organic matter. This is reflected in higher TOC content and C/N ratios in the fine fractions, resulting from terrestrial input from the Kurau River mangrove ecosystem. However, this pattern does not fully apply to heavy metal distribution, only Pb consistently follows the grain-size pattern, suggesting the influence of other factors such as local inputs and the hydrodynamic sorting of metal-bearing particles. }, issn = {2528-3111}, pages = {349--363} doi = {10.14710/jkt.v29i3.30718}, url = {https://ejournal2.undip.ac.id/index.php/jkt/article/view/30718} }
Refworks Citation Data :
Ketugar Island, a coral reef conservation area on the eastern coast of Bangka Island, is potentially exposed to sedimentation and heavy metal inputs from tin mining. This research aims to evaluate the contamination levels and potential ecological risks associated with heavy metals in the sediments of the waters surrounding Ketugar Island. Heavy metal concentrations (Cd 0.09–0.16 mg/kg, Pb 0.80–3.04 mg/kg, Cu 0.07–0.10 mg/kg, and Zn 1.37–1.94 mg/kg) in surface sediments around Ketugar Island remain below the ANZECC/ARMCANZ SQGV thresholds, this is confirmed by SQG-Q, CF, Igeo, PLI, and RI indices, all of which indicate unpolluted conditions or low risk. This status is attributed to limited anthropogenic input of tin tailings due to the distance from the source and strong hydrodynamic dispersion in the open waters. Variations in sediment grain size with fine fractions dominating low energy stations on the southeastern side (KT-1, KT-2) and coarse fractions dominating the northwestern side exposed to strong monsoon currents (KT-3, KT-4) govern the distribution of organic matter. This is reflected in higher TOC content and C/N ratios in the fine fractions, resulting from terrestrial input from the Kurau River mangrove ecosystem. However, this pattern does not fully apply to heavy metal distribution, only Pb consistently follows the grain-size pattern, suggesting the influence of other factors such as local inputs and the hydrodynamic sorting of metal-bearing particles.
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