1. School of Environmental Engineering, Wuhan Textile University, 1 Fangzhi Road, Wuhan 430073, People's Republic of China
2. College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, People's Republic of China
3. Laboratory of General & Inorganic Chemical Technology, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
4. School of Civil and Environmental Engineering, Georgia Institute of Technology, Daniel Lab 304, Atlanta, GA 30332, USA