Keywords
amalgamation method
ore processing
ore mining
How to Cite
Abstract
https://dx.doi.org/10.17014/ijog.vol3no3.20083
Gold ore mining at Waluran Subregency, Sukabumi Regency was carried out by an underground mining method, and only rock that contains high enough gold ore would be taken (selective mining). The gold ore from the mining was processed with a direct amalgamation method, so it produced low gold concentrate, but the concentrate of mercury discarded to the river was high enough.
Monitoring result of water and sedimentation in Ciliunggunung River in 2004, showed that the river was contamined by mercury (Hg), and the contamination was above the value limit. This happened especially in August 2005 where the Hg content was about 0.218 mg/l on the Ciliunggunung River in CLG.07. The chemical analysis result of heavy metals for the water of the Ciliunggunung River in CLG.07 was known to contain Fe above the standard drinking water criteria, meanwhile Mn, Cu, Pb, and As were still under the maximum drinking water criteria value.
To decrease the mercury contamination, it is suggested the process of gold ore from the amalgamation direct method to be changed to the amalgamation indirect method. The indirect gold ore amalgamation process consists of: removing fine particles by washing, grinding ore, and the amalgamation phase. The total impact of the indirect amalgamation method will increase the tying of gold by mercury, so the losing of mercury will be decreased and the gain of gold will be optimum.
References
Herman, D.Z., 2006. Tinjauan terhadap tailing mengandung unsur pencemar Arsen (As), Merkuri (Hg), Timbal (Pb), dan Kadmium (Cd) dari sisa pengolahan bijih logam. Jurnal Geologi Indonesia, 1 (1), h.31-36.
Indarto, S., Dharma, S.K., dan Sudaryanto, 1987. Penelitian Mineralisasi di Daerah Waluran, Kecamatan Ciracap, Kabupaten Sukabumi. Laporan Penelitian No: 11/ PPPG/1987. Puslitbang Geoteknologi-LIPI, Bandung, h.10-11
Noviardi R., Widodo, dan Astuti N.M., 2007. Konsentrasi Logam Berat Pada Air Sungai Cigaru dan Bahaya Yang Dapat Ditimbulkan Bagi Manusia. Prosiding Lokakarya Hasil Penelitian Dan Pengembangan di Bidang Ilmu Kebumian, Tasikmalaya, 4 September 2007.
Peele R., 1956. "Mining Engineers" Handbook. Third Edition, Vol. 2, New York, John Wiley & Sons Inc., h.33.
Peraturan Pemerintah No. 82 Tahun 2001. Tentang Pengelolaan Kualitas Air Dan Pengendalian Pencemaran Air.
Sukamto, R., 1975. Geologi Lembar Jampang Dan Balekambang, Jawa Skala 1:100.000. Direktorat Geologi, Bandung
Sukamto, R., 1990. Geologi Lembar Jampang Dan Balekambang, Jawa Barat. Pusat Penelitian Dan Pengembangan Geologi, Bandung.
Soemarto B., Widodo, dan Pujono, 1994. Studi Mineragrafi dan Batuan Ubahan Silikat di Daerah Prospek Surade, Kabupaten Sukabumi. Prosiding Hasil-hasil Penelitian Puslitbang Geoteknologi-LIPI, Bandung.
Sevruykov, N., Kuzmin, B., dan Chelishchev, Y., 1960.
General Metallurgy. Peace Publisher, Moscow., 545 h.
Wahyu, T., 2006. Sosialisasi Hasil Pemantauan Pencemaran Air Raksa Dari Pengolahan Emas Di Kecamatan Waluran Tahun Anggaran 2006, Dinas Pertambangan dan Energi, Kabupaten Sukabumi, 23 Agustus 2006, h.5-14.
Widodo, 2006. Optimalisasi Pengolahan Bijih Emas Cara Amalgamasi di Kecamatan Waluran Kabupaten Sukabumi, UPT Loka Uji Teknik Penambangan Jampang Kulon - LIPI Sukabumi, h.4-17.