EKSTRAKSI EMAS DENGAN PROSES ELECTROWINNING LARUTAN KAYA EMAS SIANIDA DENGAN VARIASI MATERIAL KATODA DAN JARAK KATODA-ANODA DI PT GLOBAL MINERALIUM CORPORINDO, KALASAN, KABUPATEN SLEMAN, DI YOGYAKARTA

PANGASTUTI, DIAH (2023) EKSTRAKSI EMAS DENGAN PROSES ELECTROWINNING LARUTAN KAYA EMAS SIANIDA DENGAN VARIASI MATERIAL KATODA DAN JARAK KATODA-ANODA DI PT GLOBAL MINERALIUM CORPORINDO, KALASAN, KABUPATEN SLEMAN, DI YOGYAKARTA. Other thesis, UPN "Veteran" Yogyajarta.

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Abstract

v
ABSTRAK
Proses electrowinning dilakukan di PT. Global Mineralium Corporindo
untuk memurnikan logam emas. Larutan elektrolit atau larutan kaya yang
digunakan merupan produk dari proses pelindian emas sianida. Proses
electrowinning yang terjadi menyebabkan pengendapan ion emas dari larutan kaya
dengan memanfaatkan penghantaran elektron dari katoda ke anoda.Penghantaran
elektron tersebut dapat melepaskan ion emas dari senyawa emas-sianida hingga
membentuk endapan di katoda
Pengaruh penting dari elektroda terkhususnya katoda merupakan poin yang
melatarbelakangi penelitian ini. Peninjauan pengaruh dari jenis material katoda,
bentuk katoda dan jarak antara katoda dan anoda dilakukan untuk mengetahui
bagaimana pengaruhnya terhadap hasil perolehan emas dari proses electrowinning.
Penelitian yang dilakukan menggunakan variasi material katoda stainless
steel 316 dan carbon steel 1020, variasi bentuk pada katoda dengan material
stainless steel 316 bentuk plat dan wol, serta variasi jarak antara katoda dan anoda
sejumlah 5 dan 8 sentimeter. Proses electrowinning dilakukan selama 7 hari dengan
pemberian tegangan yang sama yaitu 6,8 volt. Larutan kaya yang berperan sebagai
larutan elektrolit digunakan sebanyak 4,5 liter untuk masing-masing sel.
Analisis dilakukan dengan pengamatan hasil endapan yang diproses melalui
Atomic Adsorption Spectrophotometry atau disebut AAS yang mana hasil AAS ini
berupa kadar emas dalam satuan mg/L. Dari hasil penelitian ditemukan bahwa
penggunaan material berjenis stainless steel 316 plat berjarak 5cm memberikan
hasil lebih besar dibandingkan carbon steel 1020, stainless steel 316 berbentuk wol
maupun stainless steel 316 plat berjarak 8cm, dari segi berat logam emas yang
terendapkan maupun kadar yang menunjukkan hasil persen ekstraksi pada endapan
di katoda yang diperoleh melalui proses stripping menggunakan air dan HCl juga
pada endapan yang terdapat di dasar sel.
Kata kunci: Electrowinning, endapan, katoda, emas.
vi
ABSTRACT
The electrowinning process is carried out at PT. Global Mineralium
Corporindo to refine gold metal. The electrolyte solution or pregnant solution used
is a product of the cyanide gold leaching process. The electrowinning process that
occurs causes the deposition of gold ions from pregnant solution by utilizing the
electron transfer from the cathode to the anode. The electron transfer can release
gold ions from the gold-cyanide compound to form a precipitate at the cathode.
The important influence of the electrodes, especially the cathode, is the point
behind this research. A review of the effect of the type of cathode material, the shape
of the cathode and the distance between the cathode and anode was carried out to
find out how it affects the yield of gold from the electrowinning process.
The research was conducted using a variety of cathode materials of stainless
steel 316 and carbon steel 1020, variations in the shape of the cathode with
stainless steel 316 material in the form of plates and wool, as well as variations in
the distance between the cathode and anode of 5 and 8 centimeters. The
electrowinning process was carried out for 7 days by applying the same voltage,
namely 6.8 volts. A rich solution that acts as an electrolyte solution is used as much
as 4.5 liters for each cell.
The analysis was carried out by observing the results of the precipitate
processed through Atomic Adsorption Spectrophotometry or called AAS where the
results of this AAS are the gold content in units of mg/L. From the results of the
study it was found that the use of stainless steel 316 plates with a distance of 5cm
gave greater results than carbon steel 1020, stainless steel 316 in the form of wool
and stainless steel 316 plates with a distance of 8cm, in terms of the weight of the
gold metal deposited and the grade which shows the percent extraction results on
the precipitate at the cathode obtained through a stripping process using water and
HCl as well as on the precipitate found at the bottom of the cell.
Keywords: Electrowinning, precipitate, cathode, gold.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Electrowinning, precipitate, cathode, gold.
Subjects:	T Technology > T Technology (General)
Divisions:	Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User:	Eko Yuli
Date Deposited:	18 Jul 2023 02:11
Last Modified:	18 Jul 2023 02:11
URI:	http://eprints.upnyk.ac.id/id/eprint/36462

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