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Reduksi Torium Pada Limbah Cair Pengolahan Monasit Menggunakan Resin Penukar Anion
DOI: http://dx.doi.org/10.55981/eksplorium.2020.6006
Abstract
ABSTRAK Dampak dari pemisahan logam tanah jarang pada monasit adalah limbah cair yang mengandung unsur radioaktif torium yang berbahaya bagi lingkungan dan makhluk hidup. Metode standar dalam pemisahan torium dari limbah cair adalah dengan menggunakan resin penukar anion. Penelitian ini bertujuan untuk mengetahui jenis resin penukar anion, massa resin, dan waktu kontak yang optimum untuk menurunkan kadar torium dalam limbah cair monasit. Hasil menunjukkan bahwa laju penukaran optimum terjadi pada resin Amberlite IRA402 dengan waktu kontak 60 menit dan massa 1 gram yaitu sebesar 57,7%. Sementara itu, pada resin Tulsion A23, laju penukaran optimum sebesar 50,7% terjadi pada waktu kontak 50 menit dan massa resin 1 gram. Uji statistik menunjukkan tidak ada perbedaan nyata pada variasi jenis resin dan waktu kontak yang menunjukkan nilai signifikan >0,05. Pada waktu yang sama, terdapat perbedaan nyata pada variasi massa resin dengan hasil nilai signifikan <0,05. Uji Duncan menyatakan massa resin kecil (0,25 dan 0,5 gram) cocok untuk Tulsion A23 dan massa resin besar (0,75 dan1 gram) cocok untuk resin Amberlite IRA402.
ABSTRACT The effect of separating rare earths from monazite is wastewater containing the radioactive element thorium which is harmful to the environment and living things. A standard method of separating thorium from wastewater is with anion-exchange resin. This study determines the optimum type of anion-exchange resin, resin weight, and contact time to reduce thorium levels in monazite wastewater. The results showed that the optimum exchange rate that occurred in Amberlite IRA402 resin is 57.7%, at 60 minutes and 1 gram. Meanwhile, the optimum exchange rate for Tulsion A23 resin is 50.7%, at 50 minutes and 1 gram. The statistical test showed that there was no significant difference in the resin type and contact time variation, which showed a considerable value >0.05. At the same time there was a substantial difference in resin mass variation with a significant value <0.05. The Duncan test stated that lighter resin masses (0.25 and 0.5 gram) are suitable for Tulsion A23 and heavier resin masses (0.75 and 1 gram) are ideal for Amberlite IRA402.
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