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Preliminary Synthesis of Calcium Silicates using Oil Palm Leaves and Eggshells.

1Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Bengkulu, Indonesia

2Schools of Chemical Sciences, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia

3Department of Physic, Faculty of Science, Kasetsart University, Bangkok, Thailand

4 Department of Chemistry, Faculty of Natural Sciences, Jamia Millia Islamia (Central University), New Delhi, India

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Received: 20 Apr 2020; Revised: 3 Jul 2020; Accepted: 8 Jul 2020; Available online: 30 Jul 2020; Published: 1 Aug 2020.
Editor(s): Bunjerd Jongsomjit
Open Access Copyright (c) 2020 by Authors, Published by BCREC Group under

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A new synthetic procedure is described for the synthesis of calcium silicate derivatives, using natural resources such as eggshell (ES) for calcium and oil palm leaves (OPL) for silica, which do not require prepurification. The reaction is performed by directly converting two weight ratio of the precursors, ES:3OPL and ES:6OPL, to dried-powder form by heat treatment at 900 °C for two hours. The results demonstrate that the concentration of the precursors has an effect on the morphology and crystallinity of the calcium silicate derivatives, mainly Ca2SiO4 and CaSiO3. X-ray diffraction results reveal that the reaction product obtained using a 1:3 ratio is quite pure, and mainly consisted of calcium silicate in the form of Ca2SiO4. The CaSiO3 was also identified in ES:6OPL, together with a small amount of excess non-reacted crystalline silica. Furthermore, a scanning electron microscopy analysis shows that both reaction products have a coarse surface. Copyright © 2020 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (


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Keywords: eggshell; oil palm leaves; silica; calcium silicate
Funding: Lembaga Penelitian dan Pengabdian kepada Masyarakat, Universitas Bengkulu

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