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All Journal Reaktor JURNAL KIMIA SAINS DAN APLIKASI JURNAL TEKNOLOGI LINGKUNGAN Jurnal Teknik Kimia Journal of Natural Sciences and Mathematics Research Briliant: Jurnal Riset dan Konseptual Journal of Research and Technology IJEMS (Indonesian Journal of Environmental Management and Sustainability) Civil and Environmental Science Journal (CIVENSE) Chemistry Indonesian Journal of Chemical Research Jurnal Crystal : Publikasi Penelitian Kimia dan Terapannya Jurnal Inovasi Teknik Kimia ASEAN Journal of Community Engagement G-Tech : Jurnal Teknologi Terapan Nusantara Science and Technology Proceedings International Journal of Eco-Innovation in Science and Engineering (IJEISE) Envirous Sinergi Polmed : Jurnal Ilmiah Teknik Mesin Ranah Research : Journal of Multidisciplinary Research and Development Journal Serambi Engineering (JSE) JURNAL REKAYASA KIMIA & LINGKUNGAN
Ketut Sumada
Chemical Engineering Department, Faculty Of Engineering And Science, Universitas Pembangunan Nasional “Veteran” Jawa Timur
Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Physics Public Health Social Sciences Transportation Other

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Synthesis of Matrix Si-K-HAs Gel from Geothermal Sludge and Peat Srie Muljani; Bambang Wahyudi Wahyudi; S Suprihatin; Ketut Sumada
Reaktor Volume 18 No. 2 June 2018
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4869.103 KB) | DOI: 10.14710/reaktor.18.2.76-83

Abstract

The synthesis of matrix silica-potassium-humic acid gel (Si-K-HAs) has been performed successfully by gradual extraction and acidification method. The extraction was carried out in two stages: 1) extraction of humic substances from peat prepared by potassium hydroxide to produce potassium humate (K-HAS) solution, 2) extraction silica from geothermal sludge using K-HAs solution to produce Si-K-HAs solution. Acidification of Si-K-HAs solution prepared by citric acid (1-3N) to produce matrix gel of Si-K-HAs. The Si-K-HAs matrix gel products are characterized by Fourier Transform InfraRed (FTIR), X-ray fluroscence (XRF), and Brunauer–Emmett–Teller (BET) analysis. The acidification process was carried out in neutral to acid (pH 3-7) conditions and the results showed that at neutral pH no Si-K-HAs gel formed. IR spectra confirmed the presence of humic acid in the gel product, whereas XRF analysis confirmed the presence of potassium (K) and silica (SiO2) in the gel product. The molar ratio of SiO2:K2O in the product is 0.9 - 0.3 in the pH range of 3-5. Si-K-HAs powder can be used as soil fertilizer especially for soils that lack silica, humic, and potassium nutrients or for future application development. Keywords: gradual extraction; geothermal sludge; matrix gel; humic substance
Transformation of Calcium Carbonate Polymorph From Various Type of Shells by Carbonation Methods Srie Muljani; Erwan Adi Saputra; Ketut Sumada
Reaktor Volume 21 No. 1 March 2021
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1446.366 KB) | DOI: 10.14710/reaktor.21.1.27-34

Abstract

The utilization of shells can reduce the accumulation of shell wastes and increase the value of shells to achieve ecological and economic incentives. This study examines the transformation of calcium carbonate polymorph from several types of shells to understand the causes of their characteristics in order to suitable for their use. The types of shells used in this experiment are selected based on consumable and their habitats such as snail shells, crab shells, eggshells, batik mussels shells, and golden conch shells. The prepared shells calcinate at 900 °C, the reaction with hydrochloric acid, and carbonation by flowing CO2 into a stirred reactor to produce precipitated CaCO3. The characteristics of polymorph CaCO3  in the sintering temperature of 30, 50, and 70 ℃ were identified by XRD, FTIR, and SEM morphological. The result is that the polymorphs formed from each shell are different in shape, size, and crystallinity. At the temperature of 70 ℃, the rhombohedral calcite was obtained from snail shells, the cubic calcite was obtained from batik mussel shell, while rhombohedral calcite multilayers obtained (100%) from golden conch shells. The aragonite was obtained from batik mussel shells at 30 and 70 ℃. The pure vaterite (100%) was obtained from snail shells and crab shells at 50 ℃. The characteristic of polymorph formed might be useful as information for more suitable applications, especially as nano-bio materials, optical, or filler
Co-Authors Adinda Rimarsya Bahita Ahmad Adzani, Mayla Fayzza Aisyah Alifatul Zahidah Rohmah Alifah Nur Aini Fajrin Amelia Putri Kusherawati Anarchie, Thafie Ghilas Anggelina, Efline Anggoro, Achmad Rahditya Viman Anggraeni, Verendria Putri Caesar Anggun, Brendayani Arianti, Rahma Dea Rerindra Arief S, Purwanto Bambang Wahyudi Wahyudi Berliana Ayu Emilia Candra Dewi Caecilia - Pujiastuti Caecilia Pudjiastuti Caecilia Pujiastuti Caecilia Pujiastuti Caecilia Pujiastuti Caecilia Pujiastuti Chaerani, Novika Cahya Cindy Saskia Damayanti Clareta Rahmawati Maudy Delfian Lutfiananda Dewi, Dwi Kirana Ika Candra Dimas Agus Andriansyah Dwi Hery Astuti Dyah Suci Perwitasari Effendi, Anggi Aulia Putri Erda Roriza Putri Redina Erwan Adi Saputro Fahturrozak, Ahmad Farhan Azka Nashuha Hamzah, Maditya Amirul Jaenuri, Abdul Rahman Khadafi Kindriari Nurma Wahyusi Laila, Indah Nur Meriana Armidianti Meriska Diva Nadia Putri Amrulloh Meutia Familya Monica, Clarissa Putri Muhimatur Rosida Nailah Rosikah, Nasywa Ni Ketut Sari Niken Febrila Awardani Noni Aulia Nove Kartika Noviardyanti, Fara Zabrina Palaguna, Kadek Aditya Pamoedji, Yemima Natalia Eka Kristiyanti Pingky Fantika Wulandari Pradana, Alfian Rizki Priambodo, Melandy Dwi Pujiastuti, Caecilia Pujiastuti, Caecilia Pujiastuti, Caecilia Pujiastuti, Caecilia Pujiastuti, Caecilia Pujiastuti, Caecilia - Putri, Dinar Ismilla Rahmawati, Belinda Tri Setya Rahmawati, Fajar Nanda Raka Selaksa Charisma Muchammad Ramadhan, Mochamad Rafli Retno dewati Retno Dewati Reza Salsabilla Kafy S Suprihatin Safira, Lutfia Rima Saudhia Aulizya Niswatul Khusna Selvia Sofi Yanti Setiani, Astri Silviana Ariana Sintha Soraya Santi Sri Muljani Sri Muljani SRIE MULJANI Suprianti, Lilik Suprihatin Suprihatin Susilowati Tiur Lina Tri Andini Agustin Verbiawan, Erza Anggara Vica Brilliany Sanjaya Vidyantari, Lyra Widya P, Vika Widyaningrum, Nilam Putri Yogaswara, Rachmad Ramadhan Yuriko Tiara Yustina Ngatilah Yustina Ngatilah Zain, Tama Rahmandha