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All Journal Indonesian Journal of Chemical Science Eksplorium : Buletin Pusat Pengembangan Bahan Galian Nuklir
Herry Poernomo
Center of Research and Development for Advanced Technology, National Nuclear Energy Agency, Jl. Babarsari Kotakpos 1008 Yogyakarta, 55010
Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Energy Engineering Materials Science & Nanotechnology

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Pengaruh Kecepatan Pengadukan dan Waktu Tinggal Reaktan terhadap Temperatur dan Volume Fluid dalam RATB Bench Scale untuk Persiapan Sintesis ZBS Sudaryadi, Sudaryadi; Rachmawati, Isti Dian; Poernomo, Herry
Indonesian Journal of Chemical Science Vol 9 No 3 (2020)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/ijcs.v9i3.41644

Abstract

Modul reaktor alir tangki berpengaduk (RATB) bench scale adalah suatu perangkat reaktor untuk reaksi kimia yang spesifikasi teknisnya diperoleh dari hasil desain dengan mengadopsi kaidah desain RATB namun dengan ukuran desain yang kecil (volume 1000 mL) yang dilengkapi dengan sistem pengatur debit dan kecepatan pengadukan serta pengendali temperatur. Tujuan penelitian ini adalah melakukan uji fungsi pengatur debit dan pengendali temperatur pada modul RATB bench scale gelas untuk persiapan sintesis zirconium basic sulphate (ZBS) - Zr5O8(SO4)2.15H2O berdasarkan karakteristik perubahan volume dan temperatur fluida yang terukur dalam reaktor. Metode yang dilakukan diawali dengan kalibrasi pompa dosis sebagai pengukur kecepatan alir larutan ZrOCl2, reaktan (NH4)2SO4, dan slurry ZBS. Kemudian dari data debit fluida dilakukan percobaan pengaruh waktu tinggal fluida (60, 75, 90, 105, 120 menit) dan kecepatan pengadukan fluida (100, 200, 250, 300 rpm) terhadap penyimpangan volume dan temperatur fluida terukur dari data desain modul RATB bench scale dengan volume 1000 mL dan temperatur 90 oC. Hasil penelitian menunjukkan bahwa pada percobaan pengaruh waktu tinggal dan kecepatan pengadukan memberikan rentang volume fluida 900 – 1030 mL atau dengan penyimpangan volume fluida 0 – 5 % dan rentang temperatur fluida di dalam reaktor 89,0 – 92,6 oC atau dengan penyimpangan temperatur fluida 1,1 – 2,8 %. Berdasarkan data penyimpangan volume dan temperatur fluida terukur yang < 10 %, maka dapat disimpulkan bahwa alat pengatur debit dan pengendali temperatur pada RATB bench scale memiliki kinerja yang baik.
Extraction of Zr in Gold Mine Tailings to Produce TENORM Free Zirconium Oxychloride Octahidrate (ZOC) Sari, Erlin Purwita; Sajima, Sajima; Prabasiwi, Devi Swasti; Poernomo, Herry
Indonesian Journal of Chemical Science Vol 10 No 2 (2021)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/ijcs.v10i2.47923

Abstract

Gold mine tailings causes environmental problems if disposed without previous processing. Nowadays, secondary resources recycling has become people worldwide consideration because the increasing awareness of the sustainable development urgency. This study aims to extract the valuable mineral content in gold mine tailings to produce ZOC. The research begins with an alkaline fusion process using NaOH. The water leaching process was performed to the smelted alkaline with ratio of solids mass to water volume of 1:30. The resulted solid was dried for further used in the synthesis of ZOC. A number of ZOCs were reacted with HCl at a ratio of solid mass to HCl volume of 1:20, HCl 4N, and temperature of 60 °C for 1.5 hours. The solution then be crystallized to obtain ZOC solids without centrifugation process. This reaction was done using 1-step ZOC synthesis method without passing over zirconium base sulfate (ZBS) manufacturing phase. The ZOC crystals were analyzed using FTIR, XRD, and XRF. The data indicated that the synthesized product was identified as zirconium oxychloride octahydrate (ZrOCl2·8H2O). The compound showed 0% of ThO2 and U3O8 content or could be called TENORM free. The calculation results showed that the % recovery of Zr was 85.94%.
Pengaruh Kecepatan Pengadukan dan Waktu Tinggal Reaktan terhadap Temperatur dan Volume Fluid dalam RATB Bench Scale untuk Persiapan Sintesis ZBS Sudaryadi, Sudaryadi; Rachmawati, Isti Dian; Poernomo, Herry
Indonesian Journal of Chemical Science Vol 9 No 3 (2020)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/ijcs.v9i3.41644

Abstract

Modul reaktor alir tangki berpengaduk (RATB) bench scale adalah suatu perangkat reaktor untuk reaksi kimia yang spesifikasi teknisnya diperoleh dari hasil desain dengan mengadopsi kaidah desain RATB namun dengan ukuran desain yang kecil (volume 1000 mL) yang dilengkapi dengan sistem pengatur debit dan kecepatan pengadukan serta pengendali temperatur. Tujuan penelitian ini adalah melakukan uji fungsi pengatur debit dan pengendali temperatur pada modul RATB bench scale gelas untuk persiapan sintesis zirconium basic sulphate (ZBS) - Zr5O8(SO4)2.15H2O berdasarkan karakteristik perubahan volume dan temperatur fluida yang terukur dalam reaktor. Metode yang dilakukan diawali dengan kalibrasi pompa dosis sebagai pengukur kecepatan alir larutan ZrOCl2, reaktan (NH4)2SO4, dan slurry ZBS. Kemudian dari data debit fluida dilakukan percobaan pengaruh waktu tinggal fluida (60, 75, 90, 105, 120 menit) dan kecepatan pengadukan fluida (100, 200, 250, 300 rpm) terhadap penyimpangan volume dan temperatur fluida terukur dari data desain modul RATB bench scale dengan volume 1000 mL dan temperatur 90 oC. Hasil penelitian menunjukkan bahwa pada percobaan pengaruh waktu tinggal dan kecepatan pengadukan memberikan rentang volume fluida 900 – 1030 mL atau dengan penyimpangan volume fluida 0 – 5 % dan rentang temperatur fluida di dalam reaktor 89,0 – 92,6 oC atau dengan penyimpangan temperatur fluida 1,1 – 2,8 %. Berdasarkan data penyimpangan volume dan temperatur fluida terukur yang < 10 %, maka dapat disimpulkan bahwa alat pengatur debit dan pengendali temperatur pada RATB bench scale memiliki kinerja yang baik.
Extraction of Zr in Gold Mine Tailings to Produce TENORM Free Zirconium Oxychloride Octahidrate (ZOC) Sari, Erlin Purwita; Sajima, Sajima; Prabasiwi, Devi Swasti; Poernomo, Herry
Indonesian Journal of Chemical Science Vol 10 No 2 (2021)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/ijcs.v10i2.47923

Abstract

Gold mine tailings causes environmental problems if disposed without previous processing. Nowadays, secondary resources recycling has become people worldwide consideration because the increasing awareness of the sustainable development urgency. This study aims to extract the valuable mineral content in gold mine tailings to produce ZOC. The research begins with an alkaline fusion process using NaOH. The water leaching process was performed to the smelted alkaline with ratio of solids mass to water volume of 1:30. The resulted solid was dried for further used in the synthesis of ZOC. A number of ZOCs were reacted with HCl at a ratio of solid mass to HCl volume of 1:20, HCl 4N, and temperature of 60 °C for 1.5 hours. The solution then be crystallized to obtain ZOC solids without centrifugation process. This reaction was done using 1-step ZOC synthesis method without passing over zirconium base sulfate (ZBS) manufacturing phase. The ZOC crystals were analyzed using FTIR, XRD, and XRF. The data indicated that the synthesized product was identified as zirconium oxychloride octahydrate (ZrOCl2·8H2O). The compound showed 0% of ThO2 and U3O8 content or could be called TENORM free. The calculation results showed that the % recovery of Zr was 85.94%.
Kajian Konsep Teknologi Pengolahan Pasir Zirkon Lokal yang Mengandung Monasit, Senotim dan Ilmenit Poernomo, Herry; Biyantoro, Dwi; Purwani, Maria Veronica
EKSPLORIUM Vol. 37 No. 2 (2016): NOVEMBER 2016
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2016.37.2.3054

Abstract

The existence of zircon (ZrSiO4) in the nature is mostly associated with some of the valuable oxide compounds (VOC), such as TiO2 and rare earth oxides (REO). The existence of natural minerals in Indonesia containing zirconium (Zr) and REO lies in 13 regions, ranging from Aceh to West Papua province. Based on those aforementioned aspects, the goal of this research is to conduct the study of integrated technology of local zircon sand processing containing TiO2 and REO. The study was conducted by analyzing the content of VOC in zircon sand samples from the areas of Landak and Tumbang Titi West Kalimantan and Bangka by using XRF. Based on the content of VOC in this zircon sand, it can be predicted that the zircon sand from the area of Landak and Tumbang Titi West Kalimantan and Bangka contains mineral zircon (ZrSiO4), ilmenite (FeTiO3), monazite (LREE, Th)PO4, and xenotime (HREE, Th)PO4. Based on these types of mineral, the flow chart of beneficiation technology process to increase the concentration of each mineral and the flow chart of zircon concentrate process into ZrO2(zirconia) and ZrOCl2.8H2O (zirconium oxychloride) industrial grade and zirconia and zirconium chemicals nuclear grade, ilmenite into TiO2, monazite into Nd2O3, and Th(OH)4 concentrate, xenotime into Y2O3, Gd2O3, and Th(OH)4 concentrate are obtained in one area of pilot plant or an integrated factory. The results of the study concluded that the concept of local processing of zircon sands containing monazite, xenotime, and ilmenite can be either integrated in the region with the results of multi-product plant. If it can be realized in Indonesia with the addition of an integrated waste water treatment system, then in addition to safe for the environment can also save on production costs and give economic added value for shareholders zircon mining permit.
Co-Authors Dwi Biyantoro Maria Veronica Purwani Prabasiwi, Devi Swasti Rachmawati, Isti Dian Sajima, Sajima Sari, Erlin Purwita Sudaryadi, Sudaryadi