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Mia Azizah
Biology Study Program, Faculty of Science and Technology, Universitas Islam Negeri Syarif Hidayatullah, Jakarta, 15412 (Indonesia)

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Accumulation of Manganese (Mn) in Tilapia (Oreochromis mossambicus) and Environmental Health Risk Assessment Mia Azizah; Muhamad Abdul Govin; Nina Ariesta
Journal of Biotropical Research and Nature Technology Vol. 5 No. 1 (2026): Journal of Biotropical Research and Nature Technology
Publisher : Pandawa Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47352/jbrnt.2964-0431.451

Abstract

Situ Tlajung Hilir in Gunung Putri District, Bogor Regency, has been reported to be polluted by industrial waste, which may cause heavy-metal accumulation in tilapia (Oreochromis mossambicus) consumed by the surrounding community. This study aimed to analyze the manganese (Mn) concentration in tilapia and the health risk to people consuming tu sing the Environmental Health Risk Assessment (EHRA) method. Fish samples were collected from three sampling points (A, B, and C) by purposive sampling, while anthropometric and consumption data were obtained through interviews with 30 respondents. Mn concentration was determined using Atomic Absorption Spectrophotometry (AAS) at a wavelength of 279.5 nm following wet digestion. The results showed Mn concentrations of 18.22–18.37 mg/kg (point A), 12.60–12.75 mg/kg (point B), and 6.25–6.29 mg/kg (point C), all exceeding the WHO 2004 standard of 1 mg/kg. The Risk Quotient (RQ) values ranged from 0.0187 (lowest) and 0.0645 (average) to 0.3116 (highest). Because all RQ values were < 1, the community of Situ Tlajung Hilir is still considered safe to consume tilapia under the exposure assumptions applied for up to 30 years ahead; however, these values may change if the rate and frequency of consumption increase.
Bioaccumulation of Heavy Metals Fe, Cu, and Mn in Mozambique Tilapia (Oreochromis mossambicus) from Situ Tlajung Hilir, Gunung Putri, Bogor Widya Kartika Laksmawati; Mia Azizah; Nurlela Nurlela; Sufrizal Ihsan Latief
Journal of Biotropical Research and Nature Technology Vol. 5 No. 1 (2026): Journal of Biotropical Research and Nature Technology
Publisher : Pandawa Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47352/jbrnt.2964-0431.452

Abstract

Freshwater ecosystems located near urban, industrial, and residential areas are vulnerable to heavy metal contamination derived from anthropogenic activities, including industrial discharge, domestic wastewater, and surface runoff. These contaminants may accumulate in aquatic organisms and potentially affect food safety when contaminated fish are consumed. This study evaluated the concentrations of iron (Fe), copper (Cu), and manganese (Mn) in the edible muscle tissue of Mozambique tilapia (Oreochromis mossambicus) collected from Situ Tlajung Hilir, Bogor Regency, Indonesia. Fish samples were obtained from three purposively selected locations representing areas influenced by community activities, industrial operations, and domestic wastewater discharge. Heavy metal concentrations were determined using Atomic Absorption Spectroscopy (AAS) following wet digestion of dried muscle tissues. The concentrations of Fe, Cu, and Mn varied among sampling locations, with Fe showing the highest accumulation, followed by Cu and Mn. Based on dry weight measurements, Fe concentrations ranged from 66.14 to 621.39 mg kg⁻¹, Cu from 0.87 to 21.27 mg kg⁻¹, and Mn from 5.14 to 6.18 mg kg⁻¹. Although numerical differences were observed among sampling locations, statistical analysis indicated that these differences were not significant, suggesting high within-site variability and limited statistical power due to the small number of biological replicates. The elevated concentrations of metals in fish muscle indicate that O. mossambicus from Situ Tlajung Hilir has accumulated Fe, Cu, and Mn, possibly reflecting the influence of surrounding anthropogenic activities. However, direct identification of contamination sources requires further analysis of water, sediment, and physicochemical parameters. These findings provide preliminary evidence of heavy metal bioaccumulation in fish from an urban freshwater ecosystem and highlight the need for continuous environmental monitoring and future human health risk assessment.
Co-Authors Muhamad Abdul Govin Nina Ariesta Nurlela Nurlela Sufrizal Ihsan Latief Widya Kartika Laksmawati