Synthesis of hydroxyapatite-alginate composite: Methylene blue adsorption

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

References

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