Gyan Prameswara
@atim.ac.id
Mineral Chemical Engineering
Politeknik ATI Makassar
Gyan Prameswara is a dedicated scientist and academician with a passion for mineral processing, hydrometallurgy, chemical process engineering, and separation process technologies. Currently serving as a lecturer at Politeknik ATI Makassar, Gyan's work focuses on the development and optimization of processes involved in extracting valuable metals and minerals from their ores.
Gyan's research in mineral processing revolves around finding efficient and sustainable methods to extract and refine minerals. By exploring novel techniques, he aims to enhance the recovery rates of valuable metals while minimizing environmental impact. His expertise lies in designing and optimizing mineral processing plants, including crushing, grinding, flotation, and gravity separation systems.
In the field of hydrometallurgy, Gyan explores the application of aqueous solutions to extract and purify metals from their ores. He investigates various leaching techniques, solvent extraction, precipitation, and elec
EDUCATION
Chemical Engineering Graduate Program - Gadjah Mada University
RESEARCH, TEACHING, or OTHER INTERESTS
Chemical Engineering, Materials Science
FUTURE PROJECTS
MHP Production from limonite laterite ore, Morowali
Applications Invited
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Gyan Prameswara, Idi Amin, Andi Nurfaadhilah Ulfah, Iga Trisnawati, Himawan Tri Bayu Murti Petrus, and Fitria Puspita
Springer Science and Business Media LLC
Gyan Prameswara, Flaviana Yohanala Prista Tyassena, Monita Pasaribu, Iga Trisnawati, and Himawan Tri Bayu Murti Petrus
Springer Science and Business Media LLC
Gyan Prameswara, Iga Trisnawati, Tri Handini, Herry Poernomo, Panut Mulyono, Agus Prasetya, and Himawan Tri Murti Bayu Petrus
International Journal of Technology
I. Trisnawati, G. Prameswara, E. P. Sari, A. Prasetya, P. Mulyono, and H. T. M. B. Petrus
Pleiades Publishing Ltd
Iga Trisnawati, Akbar Yulandra, Gyan Prameswara, Wahyu Rachmi Pusparini, Panut Mulyono, Agus Prasetya, and Himawan Tri Bayu Murti Petrus
Springer Science and Business Media LLC
This study investigated the effects of temperature, pH, and stirring speed of multistage precipitation processes. The purification process consists of uranium and thorium precipitation, oxalate precipitation, calcination, HNO3 leaching, and oxidation; finally, multistage precipitation is performed using Na2CO3 and NH4OH. The precipitation efficiencies of light rare earth elements (LREEs) and heavy rare earth elements (HREEs) reached 88% and 74%, respectively, during precipitation with 15% Na2CO3 at a temperature of 50 °C, pH of 4.5, and 200 rpm. The precipitation process was continued by adding 10% NH4OH to the first precipitation raffinate. A total of 45% of the LREEs were recovered at a temperature of 30 °C, pH of 8, and 300 rpm. Meanwhile, 72% of the HREEs were recovered at a temperature of 30 °C, pH of 7, and 200 rpm. It was observed that Na2CO3 was effective in precipitating rare earth elements (REEs) at higher temperatures, whereas NH4OH was better at precipitating the HREEs from an REE-nitrate solution under the same processing conditions.
Gyan Prameswara, Iga Trisnawati, Panut Mulyono, Agus Prasetya, and Himawan Tri Bayu Murti Petrus
Springer Science and Business Media LLC
Gyan Prameswara, Iga Trisnawati, Herry Poernomo, Panut Mulyono, Agus Prasetya, and Himawan Tri Bayu Murti Petrus
Springer Science and Business Media LLC
We studied yttrium extraction from untreated zircon sand processing waste tailings. Xenotime mineral as the rare earth element source with an abundance of yttrium (REY) was detected in sufficient grade for extraction. As much as 9.03% yttrium exists in zircon tailings (analysed by X-ray fluorescence spectrometry). The presence of yttrium was confirmed by X-ray diffractometry in xenotime minerals, which are yttrium carriers (Y-PO 4 ). The purpose of this research was to determine the effect of leaching conditions on yttrium recovery from zircon sand after alkaline fusion treatment. Alkaline fusion was chosen to decompose phosphate into hydroxide in the xenotime mineral, which will reduce further required hydrometallurgical processing. Alkaline fusion was carried out for 3 h at 450 °C, with a ratio of sodium hydroxide to zircon tailings sand of ~ 1:1. The alkaline fusion product was leached with water, followed by hydrochloric acid treatment to leach the yttrium. Yttrium recovery reached 87% under optimum conditions (60 °C, 1 M HCl, and solid-to-liquid ratio = 1/10 for 7.5 min). A suitable model for yttrium dissolution with hydrochloric acid was diffusion through a solid particle ash layer. The calculated activation energy (E A ) for this model was 20.21 kJ/mol.
Iga Trisnawati, Gyan Prameswara, Panut Mulyono, Agus Prasetya, and Himawan Tri Bayu Murti Petrus
International Journal of Technology