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

Figure 2

Steps in the preparation of HAP from calcined powdered eggshells. (a) Heating and stirring. (b) Acid addition. (c) pH measurement. (d) Aging. (e) Calcination. (f) Filtration.

(a)

(b)

(c)

(d)

(e)

(f)