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Title: | Biopolymer-Based Nanohydroxyapatite Composites for the Removal of Fluoride, Lead, Cadmium, and Arsenic from Water |
Authors: | Fernando, M. Shanika Wimalasiri, A.K.D.V.K. Dziemidowicz, Karolina Williams, Gareth R. Koswattage, K.R. Dissanayake, D.P. de Silva, K.M. Nalin de Silva, Rohini M. |
Keywords: | Hydroxyapatite Adsorption Fluoride Arsenate Cadmium Lead Biopolymer nanocomposite |
Issue Date: | 2021 |
Publisher: | American Chemical Society |
Citation: | Fernando MS, Wimalasiri AKDVK, Dziemidowicz K, et al. Biopolymer-Based Nanohydroxyapatite Composites for the Removal of Fluoride, Lead, Cadmium, and Arsenic from Water. ACS Omega. 2021;6(12):8517-8530. Published 2021 Mar 18. doi:10.1021/acsomega.1c00316 |
Abstract: | In this study, hydroxyapatite (HAP) nanocomposites were prepared with chitosan (HAP-CTS), carboxymethyl cellulose (HAP-CMC), alginate (HAP-ALG), and gelatin (HAP-GEL) using a simple wet chemical in situ precipitation method. The synthesized materials were characterized using scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, Brunauer−Emmett−Teller surface area analysis, and thermogravimetric analysis. This revealed the successful synthesis of composites with varied morphologies. The adsorption abilities of the materials toward Pb(II), Cd(II), F−, and As(V) were explored, and HAP-CTS was found to have versatile adsorption properties for all of the ions, across a wide range of concentrations and pH values, and in the presence of common ions found in groundwater. Additionally, X-ray photoelectron spectroscopy and energy dispersive X-ray spectroscopy confirmed the affinity of HAP-CTS toward multi-ion mixture containing all four ions. HAP-CTS was hence engineered into a more user-friendly form, which can be used to form filters through its combination with cotton and granular activated carbon. A gravity filtration study indicates that the powder form of HAP-CTS is the best sorbent, with the highest breakthrough capacity of 3000, 3000, 2600, and 2000 mL/g for Pb(II), Cd(II), As(V), and F−, respectively. Hence, we propose that HAP-CTS could be a versatile sorbent material for use in water purification. |
URI: | 10.1021/acsomega.1c00316 http://archive.cmb.ac.lk:8080/xmlui/handle/70130/5508 |
Appears in Collections: | Department of Chemistry |
Files in This Item:
File | Description | Size | Format | |
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Biopolymer-Based Nanohydroxyapatite Composites for the Removal of Fluoride, Lead, Cadmium, and Arsenic from Water.pdf | 9.45 MB | Adobe PDF | View/Open |
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