1. State
Key Joint Laboratory of Environment Simulation and Pollution Control,
School of Environment, Tsinghua University, Beijing 100084, China
2. National
Centre of Excellence in Physical Chemistry, University of Peshawar, 25120 Peshawar, Pakistan
3. Department
of Chemistry, COMSATS Institute of Information Technology, Abbottabad 22060, Pakistan
4. School
of Civil and Environment Engineering, University of Science and Technology Beijing, Beijing 100083, China