1. Key Lab of Aerospace Structural Parts Forming Technology and Equipment of Anhui Province Institute of Industry and Equipment Technology Hefei University of Technology Hefei 230009 P. R. China
2. School of Resources and Environmental Engineering Hefei University of Technology Hefei 230009 P. R. China
3. School of Materials Science and Engineering Hefei University of Technology Hefei 230009 P. R. China
4. National Centre for Water Quality Research National Institute of Fundamental Studies Hantana Kandy Sri Lanka