Journal of Food, Agriculture and Environment

Hydroxyapatite extraction from natural source: Application for adsorption of methylene blue


Snahasish Bhowmik, Mithun Rani Nath, Biplob Miah, Md. Arafat Islam, Shaikat Chandra Dey, Tania Sabnam Binta Monir, Mohammed Abdus Salam , Shujit Chandra Paul

Recieved Date: 2020-07-28, Accepted Date: 2020-09-16


The preparation of low-cost promising adsorbents from naturally occurring materials has been receiving increased attention for the separation of hazardous pollutants from industrial effluent. Here, we prepared hydroxyapatite using alkaline heat treatment methods from two different natural sources: waste fish scale and bighead fish scale. The surface chemistry of the synthesized hydroxyapatites was well explored via Fourier transform infrared spectroscopy and the crystallinity was analyzed by recording x-ray diffraction patterns. A model pollutant, methylene blue, was used in this study to evaluate the adsorption performance of the hydroxyapatites in aqueous solution at different operating conditions of pH, time, and initial concentration of dye. The adsorption of methylene blue on hydroxyapatite surface reached equilibrium after 40 minutes at pH 12.5. The equilibrium adsorption data for both types of hydroxyapatites fitted well with the Langmuir adsorption isotherm model. The adsorption of methylene blue followed pseudo-first order kinetics in the case of hydroxyapatite prepared from mixed fish scale, whereas pseudo-second order kinetics was followed for hydroxyapatite sourced from bighead scale. The rapid adsorption of methylene blue indicates that hydroxyapatites should be prepared from various naturally occurring waste materials on a large scale for the removal of toxic pollutants from industrial effluents.


Hydroxyapatite, fish scale, methylene blue, adsorption isotherm, kinetics

Journal: Journal of Food, Agriculture and Environment
Year: 2020
Volume: 18
Issue: 3&4
Category: Agriculture
Pages: 62-69

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