Ekstraksi Emas Dengan Tetra N-Butilamonium Klorida-Kloroform = Gold Extraction Using Tetra N-Butylammoniurn Chloride-Chloroform
ABSTRACT The existence of the AuCI4 ion as the function of pH before performing the extraction of gold in the system of tetra N-butylammonium chloride (TBACI) - chloroform has been studied. The experimental data showed that at pH of 5-10, AuCI4 ion would be hydrolyzed, whereas at pH of 11 - 14, an a...
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Format: | Article NonPeerReviewed |
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[Yogyakarta] : Lembaga Penelitian dan Pangabdian kepada Masyarakat, Universitas Gadjah Mada
1999
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Online Access: | https://repository.ugm.ac.id/23241/ http://i-lib.ugm.ac.id/jurnal/download.php?dataId=6183 |
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Institution: | Universitas Gadjah Mada |
Summary: | ABSTRACT
The existence of the AuCI4 ion as the function of pH before performing the extraction of gold in the system of tetra N-butylammonium chloride (TBACI) - chloroform has been studied. The experimental data showed that at pH of 5-10, AuCI4 ion would be hydrolyzed, whereas at pH of 11 - 14, an amorf dark-brown precipitate was appeared. The emount of gold in the solution at pH 14 before extraction was around 70 %.
Extraction had been carried out by investigating the influence of pH and TBACI concentration on the extraction efficiency. The experimental result indicated that TBAC1 was a very efficient extractant for the extraction of gold from aqueous halide with an efficiency higher than 99 %. The extraction in the TBAAC1-chloroform was effective at pH of 0 -4 with minimum concentration of TBAC110-3 NI, and the calculated K. (extraction constant) was 5.07
x 104.
Key Words: Extraction, extraction efficiency, extraction constant. |
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