Hydrogeochemical Characteristics, Sources and Human Health Risk Assessment of Heavy Metal Dispersion in Malifut, North Halmahera Peter Eka Rosadi (a*), Ilham Firmansyah (a), Hasywir Thaib Siri (a), Ayu Utami (b), Susanti Rina Nugraheni (c)
a) Department of Mining Engineering, Faculty of Mineral and Energy Technology, Universitas Pembangunan Nasional ^Veteran^ Yogyakarta,
Jl. Padjajaran 104, Daerah Istimewa Yogyakarta 55283, Indonesia
*peterekarosadi[at]upnyk.ac.id
b) Department of Environmental Engineering, Faculty of Mineral and Energy Technology, Universitas Pembangunan Nasional ^Veteran^ Yogyakarta,
Jl. Padjajaran 104, Daerah Istimewa Yogyakarta 55283, Indonesia
c) Department of Chemical Engineering, Faculty of Industrial Technology, Universitas Pembangunan Nasional ^Veteran^ Yogyakarta,
Jl. Padjajaran 104, Daerah Istimewa Yogyakarta 55283, Indonesia
Abstract
This study collected water samples for hydrogeochemical analysis, assessing heavy metal concentrations and potential health risks through exposure assessments and hazard quotients in Malifut, North Halmahera, which can be contaminated by volcanic activity and gold mining activity. The result revealed a range of pH levels and various types of water affected by rock interactions. The Water Hazard Index showed value range from 0.075 to 10.38 varying levels of toxicity, implying minimal to extreme toxicity of the water.
Based on the results of the Risk Assessment, the calculated Hazard Index values indicate lower levels (<1) in surface water and (>1) for underground water, as well as low Carcinogenic Risk in surface river water and middle for underground water. Therefore, these results suggest that the contamination levels in the area are still within safe limits for various water uses. Regular monitoring and management of water quality must be conducted periodically.
