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Adsorption of phosphate from synthetic solution onto the limestone in a plug‐flow column

Khamidun, Mohd Hairul and Fulazzaky, Mohamad Ali (2015) Adsorption of phosphate from synthetic solution onto the limestone in a plug‐flow column. International Journal of Advanced and Applied Sciences, 2 (12). pp. 7-13. ISSN 2313-3724

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Abstract

The removal of phosphate (PO43-) from a synthetic solution by absorbing onto the limestone was performed in a plug-flow column reactor (PFCR) treatment process. The experiments were conducted using three different flow rates of 1.56, 2.80 and 3.91 mL min-1. Thomas and Yoon-Nelson models were applied to experimental data to understand adsorption behaviour, while the mass transfer factor (MTF) models were used to investigate the effect of flow rate on the resistance of mass transfer of PO43- onto the limestone. The results show that he saturation time increased with decrease in flow rate. The dynamic adsorption behaviour was satisfactory described by Thomas and Yoon-Nelson models. The MTF model verified that the resistance of mass transfer could be dependent on porous diffusion until the percentage of outflow reaches 72% and 86% for flow rates of 1.56. 2.80 mL min-1, respectively. Even though, film mass transfer can play a minor role in controlling the movement of PO43- from the bulk water to film zone of limestone. The results of the [kLa]f [kLa]f and kLa]d coefficients obtained from application of MTF models could be applied to understand the mechanism of mass transfer mechanism of mass transfer of PO43- across liquid-solid interfaces.

Item Type: Article
Uncontrolled Keywords: adsorption; limestone; mass transfer factor models; phosphate; plug-flow column
Subjects: T Technology > T Technology (General)
Divisions: Faculty of Civil and Environmental Engineering > Department of Water and Environmental Engineering
Depositing User: Normajihan Abd. Rahman
Date Deposited: 13 Aug 2018 03:39
Last Modified: 13 Aug 2018 03:39
URI: http://eprints.uthm.edu.my/id/eprint/8127
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