TheAccumulation of Mercury on Baung Fish (Mytus nemurus) in the Kahayan River of Central Kalimantan
| Main Authors: | Panda, Adventus / P. , Nitimulyo, Kamiso Handoyo/ K. H. , Djohan, Tjut Sugandawaty/ T. S. |
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| Format: | Article PeerReviewed application/pdf |
| Bahasa: | eng |
| Terbitan: |
Pusat Studi Lingkungan Hidup Universitas Gadjah Mada
, 2003
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| Subjects: | |
| Online Access: |
https://repository.ugm.ac.id/35129/1/Jurnal_2003_Manusia_dan_Lingkungan_Vol_X_November_2003_ok.pdf https://repository.ugm.ac.id/35129/ |
Daftar Isi:
- The Kahayan River of Central Kalimantan had environmental stress due to mercury waste. This waste came from the traditional gold mining activities. There were 1014 gold mining sites along the river from upstream to downstream. Mercury in river sediment was subsequently methylated by sulfated reduction bacteria. This research were study the accumulation of mercury (Hg) on Mytus nemurus, sediment and water, from upstream to downstream in the Kahayan River. Total distance from up to downstream site was approximately 296 km. Data was collected from 3 location along the river. Within each location, sampling sites were at floodplain. Research was carried out during wet season. Fish were caught using rengge (gillnet). The determination of methylmercury was using modified CV-AAS (cold vapor atomic absorption spectrophotometry) methods. The result showed that among samples being measured, the accumulation was highest in river sediment (0,336 μg.g-1), followed by the meat of M. numerous (0,303 μg.g-1 ± 0,342), and the water (0.058 mg-1) respectively. Mercury had tendency higher toward downstream. This was due to sediment texture which was dominated by silt. Such condition was potential for methylation. Turbidity, water current and pH contributed to the increasing level of mercury in the downstream. WHO permittable-tolerable weekly intake for mercury is 171,42 μg was equal to 24,4 μg daily if one person consume 100 g M. numerous meat daily, it is possible that will be 30,3 μg.g-1 enter the body. This means that mercury along the Kahayan River threaten the people who eat fish up from this river. Key words: Kahayan River, Mercury (Hg) waste, Baung (Mytus nemurus) fish, sediment, traditional gold mine.