Synthesis of hydroxyapatite-alginate composite: Methylene blue adsorption

Year 2017, Volume: 2 Issue: 1, 37 - 47, 01.07.2017

Deniz Uzunoğlu , Tebriz Aslanov Ayla Özer

Abstract

In this study,
hydroxyapatite-alginate (HAp-SA) composite spheres were synthesized and
characterized and then the methylene blue dyestuff (MB) removal was
investigated by using the synthesized HAp-SA composite spheres as adsorbent.
The effects of environmental conditions for MB adsorption onto HAp-SA composite
spheres were investigated and the optimum environmental conditions were
obtained as follows: initial pH of 9.0, initial dye concentration of 300 mg L^-1,
temperature of 25 ^oC, and adsorbent concentration of 1.0 g L^-1. At the
optimum conditions; the MB adsorption capacities of HAp-SA spheres, HAp-SA
films, alginate spheres and HAp were compared to interpret the effectiveness of
the synthesized composite materials. Besides, the multistage adsorption system
was also investigated for the adsorption of MB onto the synthesized HAp-SA
composite spheres. Moreover, the adsorption equilibrium and thermodynamic
parameters were also determined.  

Keywords

adsorption, adsorbent characterization, composite materials, dye removal

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