Preparation of nano-structured pig bone hydroxyapatite for high-efficiency adsorption of Pb2+ from aqueous solution

摘要

abstract_textpThe nano-structured hydroxyapatite was prepared from pig bone materials by mineralization. The obtained nano-structured bone was much better compared to the bone without nanostructure for removing Pb2+. The process was investigated under different conditions including contact time, initial Pb2+ concentration, and pH. The pseudo-second-order kinetic model and Langmuir isotherm model were suitable for describing adsorption process. Moreover, the maximum adsorption capacities of nano-structured bone and bone without nanostructure were 312.5 and 96.1mg/g, respectively. Overall, the advantages of excellent adsorption capacity and simple mineralization together with low cost make nano-structured bone an attractive material for removal of Pb2+ from aqueous solution./p/abstract_text