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Journal : Seminar Nasional Teknik Kimia Kejuangan

Penggunaan Radiasi Gelombang Mikro dalam Sintesis Karbon Aktif dari Serbuk Kayu Randu dan Aplikasinya untuk Menjerap Methyl Violet Astuti, Widi; Zulaechah, Luluk Siti; Kristian, Stefanus Lian; Novira, Dinda Tri
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2017: PROSIDING SNTKK
Publisher : Prosiding Seminar Nasional Teknik Kimia "Kejuangan"

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Abstract

Randu based activated carbons were prepared using chemical activation by potassium hydroxide (KOH) and applied as a potential adsorbent for the adsorption of methyl violet dye in aqueous solution. The technique of heating during activation can affect the physical and chemical characteristics of activated carbon structure. Conventional and microwave heating techniques represent two different types of activation methods. In conventional heating, there is a thermal gradient from the hot surface of the adsorbent to its interior until steady state conditions are reached. To avoid the thermal gradient, the microwave heating technique was used. Scanning electron microscope (SEM), Fourier-transform infrared spectroscopy (FTIR) and N2 adsorption-desorption isotherm were used to study the morphology of adsorbent surface, surface chemical property and specific surface area-pore size distribution, respectively. Batch experiments were carried out to investigate the effect of pH, contact time and methyl violet concentration on sorption efficiency. The result shows that effective pH for methyl violet removal was 9. A greater amount of dye was removed with an increase in the initial concentration of dye and quasi-equilibrium reached in 180 min. The adsorption capacity of methyl violet dye by randu based activated carbon was 531.16 mg g-1.
Valuable Metals Extraction From Hydrocracking Spent Catalyst Using Citric Acid Sari, Dewi Purnama; Tawfiequrahman, Ahmad; Petrus, Himawan Tri Bayu Murti; Mufakir, Fika Rofiek; Astuti, Widi; Iskandar, Y; Bratakusuma, D
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2018: PROSIDING SNTKK 2018
Publisher : Prosiding Seminar Nasional Teknik Kimia "Kejuangan"

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Abstract

Hydrocracking spent catalyst is a hazardous residue produced in large quantities in petroleum refining industries, it contains non metals or metals  which are important components for advanced material. Leaching is a hydrometallurgical process which is an effective technology for metal extraction from low grade metal sources with appropriate solvent, low processing cost and relatively low pollutant. The waluable metals extraction was conducted using both organic and anorganic acids. Temperature (90 ̊C) and pH (1,5, 2) were varied to observed the performance of both acid with solid ratio of 1:20 in the atmosphere condition. Sample were analice using x-ray flourescence (XRF) before exraction and after extraction. From the result, it can be conducted which citric acid process ability to extract valuable metals as high as organic acid. 
Pelindian Nikel dari Bijih LimonitLow-Grade Pomalaa Menggunakan Pelarut Asam Asetat Eka Ayu Agustina, Himmah Sekar; Bendiyasa, I MAde; Petrus, Himawan Tri Bayu Murti; Mufakir, Fika Rofiek; Astuti, Widi
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2018: PROSIDING SNTKK 2018
Publisher : Prosiding Seminar Nasional Teknik Kimia "Kejuangan"

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Abstract

Nickel is a strategic metal in many modern industrial and metallurgical application. Indonesia processes nickel laterite ore of about 15% of total world reserves. This research work deals with the extraction of nickel from a low grade limonitic ore, taken from a deposit located in Pomalaa (Sulawesi), through agitation leaching at atmospheric pressure. Ore characterisation was performed by x-ray diffraction (XRD) and x-ray fluorescence (XRF). Showing that 2,651% nickel that geothite are the main mineral. The metal extraction from low-grade limonitic ore is affected by the mineralization of the ore in addition operating condition are also varied in this study including temperature (30oC,60oC,90oC), acid concentration (25%,50%,75%) and particle size (-70+100 mesh, -100+200 mesh, -200 mesh) to investigated the leaching performance. In comparison to that of inorganic acid (HCl) used in this study, acetic acid provide a potential to be applied in the extraction of metals from low grade limonitic ore.
Co-Authors . Aprolita, . Adil Jamali, Adil Agus Prasetya Aprimal Aprimal, Aprimal Arsyad Lubis, Arsyad Astrilia Damayanti Azhar Azhar Bambang Suharno Bayu Kurniawan Bratakusuma, D Bratakusuma, Danu Catur Rini Widyastuti, Catur Rini Dewi Purnama Sari Djoko Adi Widodo Eka Ayu Agustina, Himmah Sekar Endang Tri Wahyuni Fajar Nurjaman Gemilar, Gelar Panji Hendrik Setiawan, Hendrik Heni Kusumayani Heny Kusumayanti Herlina, Ulin Herlina, Ulin Himawan Tri Bayu Murti Petrus, Himawan Tri Bayu Murti I Made Bendiyasa Indah Nurul Izzati, Indah Nurul Indra Perdana Iskandar, Y Iskandar, Yusuf Isnugroho, Kusno Isnugroho, Kusno Kristian, Lian Kristian, Stefanus Lian Kusuma, Alam Budi Kusumawardani, Yustika Kusumawardani, Yustika Kusumawardani, Yustika Lanjar, Lanjar Mufakhir, Fika Rofiek Mufakhir, Fika Rofiek Mufakir, Fika Rofiek Muhammad Amin Nova Susilowati, Nova Novira, Dinda Tri Novita, Sinta Nur Nalindra Putra, Nur Nalindra Nurjanah, Isti Nurjanah, Isti Petrus, Himawan TBM Petrus, Himawan TBM Putra, Federick Dwi R.TD Wisnu Broto Radenrara Dewi Artanti Putri, Radenrara Dewi Artanti Ratna Dewi Kusumaningtyas Ratna Frida Susanti Ria Wulansarie, Ria Riayanti, Fatma Indah RTD Wisnu Broto RTD. Wisnu Broto Septriana, Ayu Setyawan, Cahya Edi shinta virdhian, shinta Shofi, Achmad Sinaga, J M Sinaga, J M Soesaptri Oediyani, Soesaptri Sofi, Achmad Suka, Ediman Ginting Tanujaya, Felisha Hapsari Tanujaya, Felisha Hapsari Tawfiequrahman, Ahmad Triastuti Sulistyaningsih Vidhian, Shinta Wanta, Kevin Cleary Wanta, Kevin Cleary Widhi Maharani Wijaya, Ardyanto Wiratni Wiratni, Wiratni Yustika Kusumawardani, Yustika Kusumawardani Zulaechah, Luluk Siti Zulaechah, Luluk Siti