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Journal : ASEAN Journal of Chemical Engineering

The Effect of Coal Fly Ash Crystallinity toward Methyl Violet Adsorption Capacity Astuti, Widi; Bendiyasa, I Made; Wahyuni, Endang Tri; Prasetya, Agus
ASEAN Journal of Chemical Engineering Vol 10, No 1 (2010)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (422.902 KB) | DOI: 10.22146/ajche.50090

Abstract

Coal fly ash (CFA) generated by coal-based thermal power plants is mainly composed of some oxides having high crystallinity, like quartz and mullite. In this study, the effect of CFA crystallinity toward methyl violet (MV) adsorption capacity was investigated. To decrease crystallinity of CFA, the solution of sodium hydroxide (NaOH) of 1-7 M was used to treat CFA at various temperatures and reflux time. Then, to evaluate the effect of NaOH-treated CFA with respect to adsorption capacity, the original and NaOH-treated CFA were tested its MV adsorption capacity in batch experiments. Original or NaOH-treated CFA was contacted with 50 mL of MV solution at temperature of 26oC. The effects of contact time, pH of solution, adsorbent dose and initial concentration of dye on the adsorption of MV were investigated. The results show that CFA treated with low NaOH concentration (1-3 M), temperature of 60oC and 2 hours reflux time, the crystallinity of quartz and mullite decreases, but its capacity on MV adsorption increases from 34% to 97%. At higher NaOH concentration (>3M), in the range of studied reflux temperature and time, it is found that decreasing quartz and mullite crytallinity are followed by a hydroxysodalite formation which causes the decreasing of MV adsorption from 97% to 83%. The highest adsorption capacity of NaOH-treated CFA was found 1.24 x 10-5 mol g-1. Adsorption kinetics of MV onto NaOH-treated CFA could be approximated with a pseudo second order kinetic model with the rate constant was 3.2 x 103 g mol-1 min-1.
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