Nanchang Hangkong University, Nanchang Hangkong University, Nanchang Hangkong University, Nanchang Hangkong University, Nanchang Hangkong University, Nanchang Hangkong University, Nanchang Hangkong University, affiliation not provided to SSRN and Nanchang Hangkong University - National-Local Joint Engineering Research Center of Heavy Metal Pollutants Control and Resource Utilization