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Effect of aging time and stirring speed in the synthesis of biogenic hydroxyapatite derived from cockle shell

Siti Hajar, Saharudin and Jun Haslinda, Haji Shariffuddin and Noor Ida Amalina, Ahamad Nordin and Aqeela, Ismail (2018) Effect of aging time and stirring speed in the synthesis of biogenic hydroxyapatite derived from cockle shell. In: International Conference on Chemical Sciences and Engineering, 7-8 November 2018 , Melaka, Malaysia. p. 1.. (Unpublished)

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Cockle shell wastes are abundant, easily available and can be obtained at low cost. It is rich in calcium carbonate (CaCO3) that can be precursor to synthesis hydroxyapatite (HAP). The HAP has potential to be used in numerous applications such as biomedical and wastewater treatment. The overall objective of this study is to determine the effect of reaction time and effect of stirring speed on the production of HAP derived from cockle shells waste. There are two reaction times used in this study which are 3 h and 5 h as well as two stirring speeds which are 500 rpm and 700 rpm. The processes involved in synthesizing the HAP were pretreatment of the cockle shells, production of CaCO3 in aragonite form, calcination of the CaCO3 to form CaO, production of Ca(OH)2 and finally reaction of the Ca(OH)2 solution with the phosphate source to obtain HAP. All samples have undergone physicochemical analyses to determine their crystallinity, purity, functional group, surface morphology and elemental analysis using X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscope (SEM) and Electron Dispersive X-ray Analysis (EDX). This study found that 5 h reaction time and 500 rpm stirring speed produced better HAP compared to the others. Overall, this study proved that reaction time and stirring speed play vital role in the quality of HAP.

Item Type: Conference or Workshop Item (Lecture)
Uncontrolled Keywords: Hydroxyapatite, cockle shell, biomaterial, wet slurry precipitation, reaction time, stirring speed
Subjects: T Technology > TP Chemical technology
Faculty/Division: Faculty of Chemical & Natural Resources Engineering
Depositing User: Noorul Farina Arifin
Date Deposited: 17 May 2019 03:55
Last Modified: 17 May 2019 03:55
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