Ningsih, Susiati (2008) Recovery Emas (I) Sianida Secara Kromatografi Ion Menggunakan Kitosan Sebagai Fasa Diam. Sarjana thesis, Universitas Brawijaya.
Abstract
Kitosan dapat digunakan sebagai materi penukar anion untuk recovery emas (I) sianida karena kitosan mempunyai gugus ~NH2 yang dapat diubah menjadi gugus aktif ~NH3 + dalam suasana asam. Emas (I) sianida yang bermuatan negatif akan diikat oleh gugus aktif kitosan ~NH3 +. Emas (I) sianida dapat diperoleh kembali melalui elusi menggunakan larutan amonium hidroksida (NH4OH) pada berbagai konsentrasi yaitu 0,005; 0,01; dan 0,02 M. Pengaruh konsentrasi NH4OH terhadap recovery emas (I) dipelajari berdasarkan luas puncak kromatogram (A) yang sebanding dengan konsentrasi emas terelusi. Berdasarkan kromatogram diketahui bahwa konsentrasi optimum NH4OH diperoleh pada 0,02 M yang selanjutnya digunakan untuk uji recovery emas (I) sianida. Nilai recovery emas (I) dipengaruhi oleh konsentrasi emas (I) sianida. Jumlah emas (I) sianida yang teretensi meningkat dengan meningkatnya konsentrasi emas (I) sianida sedangkan nilai % recovery menurun. Berdasarkan hasil penelitian menunjukkan bahwa recovery maksimum dihasilkan pada 0,5 ppm emas (I) sianida, sebesar 15,25 %.
English Abstract
Chitosan was used as anion exchanger for gold (I) cyanide recovery because it contains ~NH 2 groups that can be activated to form ~NH3 + in acid condition (pH < pKa). The negatif complex gold (I) cyanide was bounded by activated groups of chitosan ~NH3 +. The gold (I) cyanide was then recovered by eluting with ammonium hydroxide (NH4OH) in various concentrations (0.005; 0.01; and 0.02 M). The effect of NH4OH concentration towards gold (I) recovery was studied based on chromatogram peak area (A) that is proportional with the eluted gold (I) cyanide concentration. The chromatogram showed that the optimum concentration of NH4OH was obtained at 0,05 M and this concentration was used to examine gold (I) recovery. Based on the results, the value of gold (I) recovery was depended on the gold (I) cyanide concentration. Although the amount of gold (I) cyanide retained increased by increasing the gold (I) cyanide concentration, the value of % recovery decreased. The result of this research showed that the maximum recovery of 15.25 % was obtained at 0.5 ppm gold (I) cyanide.
| Item Type: | Thesis (Sarjana) |
|---|---|
| Identification Number: | SKR/MIPA/2008/165/050801957 |
| Subjects: | 500 Natural sciences and mathematics > 510 Mathematics |
| Divisions: | Fakultas Matematika dan Ilmu Pengetahuan Alam > Matematika |
| Depositing User: | Unnamed user with email [email protected] |
| Date Deposited: | 08 Sep 2008 10:30 |
| Last Modified: | 09 Mar 2022 05:08 |
| URI: | http://repository.ub.ac.id/id/eprint/151822 |
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