ANALISIS KADAR URANIUM DAN KEASAMAN UNTUK MENENTUKAN KEBUTUHAN SODIUM HIDROKSIDA PADA PENETRALAN LIMBAH URANIUM CAIR DI LABORATORIUM KIMIA INSTALASI ELEMEN BAKAR EKSPERIMENTAL

ABSTRAK─Telah dilakukan analisis kadar uranium dan keasaman untuk menentukan kebutuhan sodium hidroksida pada penetralan limbah uranium cair di laboratorium kimia IEBE. Analisis kadar uranium dilakukan untuk mengetahui kandungan uranium dalam limbah sehingga jumlah dan keberadaan bahan nuklir dapat diketahui dalam rangka menjamin pelaksanaan pertanggungjawaban dan pengendalian bahan nuklir. Sedangkan analisis keasaman dilakukan untuk mengetahui tingkat keasaman limbah sehingga dalam pengolahan lebih lanjut dapat dilakukan secara efisien dan aman bagi lingkungan. Disamping itu juga analisis keasaman dimaksudkan untuk menentukan kebutuhan sodium hidroksida yang digunakan dalam penetralan limbah sehingga penggunaan sodium hidroksida lebih efisien dan efektif. Analisis kadar uranium dilakukan dengan metode potensiometri dan analisis keasaman menggunakan metode alkalimetri. Dari hasil analisis diketahui bahwa untuk limbah drum nomor 1 kadar U sebesar 0,8665 g/L dengan keasaman 2,0790 mol/L, drum nomor 2 kadar U sebesar 0,6939 g/L dengan keasaman 1,9076 mol/L, drum nomor 3 kadar U sebesar 2,8901 g/L dan keasaman 8,1309 mol/L. Penetralan limbah uranium cair dilakukan sampai pH 7. Berdasarkan hasil analisis kadar U dan keasaman serta volume limbah uranium cair maka untuk menetralkan limbah uranium cair tersebut diperlukan sodium hidroksida masing-masing untuk drum nomor 1 sebanyak 12.474,44 g, drum nomor 2 sebanyak 11.445,95 g dan drum nomor 3 sebanyak 22.767,98 g. Total kebutuhan sodium hidroksida untuk menetralkan limbah uranium cair sebanyak 46.687,61 g (50 kg). Kata kunci : analisis, uranium, keasaman, penetralan, limbah cair ABSTRACT─ An uranium and acidity analysis was performed to determine the need for sodium hydroxide in neutralization of uranium liquid waste in the IEBE chemical laboratory. The uranium content analysis is performed to determine the uranium content in the waste so that the amount and the presence of nuclear material can be known in order to ensure the implementation of nuclear material responsibility and control. While the acidity analysis is done to determine the level of acidity of waste so that further processing can be done efficiently and safely for the environment. Besides, acidity analysis is also intended to determine the need for sodium hydroxide used in waste neutralization so that the use of sodium hydroxide is more efficient and effective. Analysis of uranium content was done by potentiometric method and acidity analysis using alkalimetric method. From the analysis results it is known that for drum waste number 1 U content of 0.8665 g /L with acidity 2.0790 mol/L, drum number 2 U content of 0.6939 g /L with acidity 1,9076 mol/L, drum number 3 U content of 2.8901 g/L and acidity of 8.1309 mol/L. The neutralization of liquid uranium wastes is done up to pH 7. Based on the results of U-level analysis and the acidity and volume of liquid uranium waste to neutralize the liquid uranium waste is required sodium hydroxide respectively for drum number 1 as much 12,474.44 g, drum number 2 as much 11,445, 95 g and drum number 3 as much 22,767.98 g. Total requirement of sodium hydroxide to neutralize uranium liquid waste as much 46,687,61 g (50 kg). Keywords: analysis, uranium, acidity, neutralization, liquid wast