1. School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo 255049, P. R. China
2. Shaoxing Sewage Treatment Development Co., Ltd, Xingbin Road, Keqiao District, Shaoxing, P. R. China
3. Department of Applied Chemistry, Faculty of Science and Engineering, Saga University Honjo-machi 1, Saga 840-8502, Japan
4. Chemistry, School of Natural Sciences, The University of Hull, Cottingham Road, Hull, Yorkshire HU6 7RX, UK