Analisis Pengayaan Unsur Logam Tanah Jarang Pada Endapan Mangan Daerah Palludda, Kabupaten Barru, Provinsi Sulawesi Selatan

Abstract

Penelitian tentang pengayaan unsur logam tanah jarang endapan mangan di daerah Palludda belum banyak dilakukan. Penelitian ini bertujuan menganalisis proses pengayaan dan potensi unsur logam tanah jarang endapan mangan di daerah Palludda. Penelitian ini dilakukan dengan metode penelitian lapangan yaitu mengambil sampel endapan mangan pada singkapan batugamping dan bongkah-bongkah hasil dari pelapukan batugamping pada permukaan. Sampel diambil di Salo Mandi, Palludda. Dalam penelitian ini dianalisis karakteristik fisika dan kimia endapan mangan menggunakan mikroskop polarisasi, XRD dan ICP-MS. Sedangkan untuk analisis komposisi unsur jejak endapan mangan menggunakan ICP-OES dan AAS. Untuk mengetahui mekanisme pengayaan unsur logam tanah jarang endapan mangan dengan melihat spider diagram yang dinormalisasi dengan Chondrite. Hasil penelitian ini menunjukkan karakteristik fisika batugamping yaitu jenis Packstone dan karakteristik kimia masing-masing endapan mangan yaitu, komponen senyawa kimia yang dominan adalah Iron oxide hydroxide goethite (45,6%), Silicon oxide alpha Quartz (41,6%) dan Goethite (47,3%). Konsentrasi unsur tanah jarang La, Ce, dan Nd memperlihatkan nilai konsentrasi tinggi (4,3-43,9 ppm). Hasil proses pengayaan unsur logam tanah jarang menunjukkan konsentrasi pada endapan mangan residu lebih tinggi dibandingkan endapan mangan cavity filling. Proses pengayaan UTJ di daerah penelitian terbentuk akibat adanya proses oksidasi

Research on the enrichment of rare earth elements in manganese deposits in the Palludda area has not been widely carried out. This study aims to analyze the enrichment process and the potential of rare earth elements manganese deposits in the Palludda area. This research was conducted using field research methods, namely taking samples of manganese deposits in limestone outcrops and boulders resulting from weathering of limestone on the surface. Samples were taken in Salo Mandi, Palludda. In this study, the physical and chemical characteristics of manganese deposits were analyzed using a polarizing microscope, XRD and ICP-MS. As for the analysis of the composition of trace elements of manganese deposits using ICP-OES and AAS. To find out the process of enrichment of rare earth elements manganese deposits by looking at the spider diagram normalized with Chondrite. The results of this study indicate the physical and chemical characteristics of limestone and manganese deposits, namely the type of Packstone, the dominant chemical components of manganese deposits are Iron oxide hydroxide goethite (45.6%), Silicon oxide alpha Quartz (41.6%) and Goethite (47.6%). 3%). Concentrations of rare earth elements La, Ce, and Nd showed high concentration values ​​(4,3-43.9 ppm). The results of the rare earth element enrichment process showed that the concentration in the residual manganese deposits was higher than that of the cavity filling manganese deposits. The enrichment process of REE in the research area is process oxidation