1. Key Laboratory of Advanced Nonferrous Metal and Material Processing Technology of Ministry of Education, School of Material Science and Engineering, Guilin University of Technology, Guilin, P. R. China;
2. School of Environmental Science and Engineering, Guilin University of Technology, Guilin, P. R. China;
3. Sichuan HongHui Technology Co, LTD, Chengdu, P. R. China