Synthesis and Characterization of Hydroxyapatite- (HAP-) Clay Composites and Adsorption Studies on Methylene Blue for Water Treatment

Figure 1

Powder preparation steps of calcined eggshells. (a) Eggshell. (b) Sun-drying. (c) Grinding. (d) Sieving. (e) Calcination. (f) Filtration.