Identifikasi Kandungan Tembaga (Cu) pada Batuan Tambang Emas Tradisional di Sumbawa melalui Metode Kopresipitasi dan Spektrofotometri Serapan Atom
DOI:
https://doi.org/10.36312/mj.v2i1.2741Keywords:
Tembaga (Cu), Tambang Emas Rakyat, Kopresipitasi, AAS, Eksplorasi MineralAbstract
Penelitian ini bertujuan untuk mengidentifikasi kandungan tembaga (Cu) pada batuan dari lokasi tambang emas rakyat di Pulau Sumbawa sebagai dasar eksplorasi logam sekunder yang potensial. Urgensi studi ini berangkat dari minimnya data sistematis mengenai keberadaan logam selain emas di lokasi penambangan tradisional, padahal logam-logam tersebut, khususnya tembaga, memiliki nilai ekonomis dan potensi risiko lingkungan. Tiga sampel batuan diambil dari lokasi Olat Pakirum, Upak, dan Labaong, lalu dianalisis menggunakan metode kopresipitasi untuk preparasi sampel, dan AAS (Atomic Absorption Spectrophotometry) untuk kuantifikasi kandungan Cu. Hasil menunjukkan bahwa batuan dari Pakirum memiliki kandungan Cu sebesar 1063,93 ppm (sekitar 1,06%), yang berada dalam kisaran nilai ekonomis. Sebaliknya, Upak dan Labaong masing-masing memiliki kandungan 86,54 ppm dan 6,71 ppm. Warna filtrat dan residu dari proses kopresipitasi juga memberikan indikasi visual yang konsisten dengan hasil AAS. Studi ini menegaskan bahwa lokasi Pakirum memiliki potensi eksplorasi tembaga yang layak dikembangkan lebih lanjut secara ilmiah dan ekonomis.
Identification of Copper (Cu) Content in Artisanal Gold Mining Rocks from Sumbawa Using Co-precipitation Method and Atomic Absorption Spectrophotometry
Abstract
This study aims to identify the copper (Cu) content in rocks from artisanal gold mining sites in Sumbawa Island, Indonesia, as a basis for evaluating the potential of secondary metal exploration. The urgency arises from the lack of systematic data on non-gold metals in traditional mining areas, despite their economic value and potential environmental risks. Rock samples were collected from Olat Pakirum, Upak, and Labaong, then analyzed using the co-precipitation method for sample preparation and Atomic Absorption Spectrophotometry (AAS) for Cu quantification. Results revealed that the Pakirum sample contained 1063.93 ppm Cu (approximately 1.06%), falling within the economically viable range. In contrast, samples from Upak and Labaong contained 86.54 ppm and 6.71 ppm respectively. Filtrate and residue colors from the co-precipitation process also visually supported the AAS findings. This study confirms that the Pakirum site holds a significant potential for copper exploration, warranting further scientific and economic development.
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