1. Urban Water Research Center, Department of Civil and Environmental Engineering, University of California, Irvine, California 92697-2175, United States
2. Department of Chemistry, Faculté des Sciences de Bizerte University of Carthage, Tunisia
3. Department of Chemistry, University of California, Irvine, California 92697-2025, United States
4. Orange County Water District, Fountain Valley, California 92708, United States
5. Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, P. R. China