Microemulsion synthesis of hydroxyapatite nanomaterials and their adsorption behaviors for Cr3+ ions

Abstract

Hydroxyapatite (HAP) nanoparticles with different morphologies, such as nanorods, nanospheres, and their mixtures were successfully synthesized by microemulsion method with soluble additive. Their adsorption capacity for Cr³⁺ ion was investigated. Most of the Cr³⁺ were absorbed by HAP within 60 min. The adsorption capacity of the HAP nanospheres was the best, and the maximum Cr³⁺ removal ratio was 96.4%, revealing that the metal ions adsorption by HAP is dependent on the morphology of its particles.