1. State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Beijing Normal Univ., Beijing 100875, China.
2. Professor, State Key Joint Laboratory of Environmental Simulation and Pollution Control, China-Canada Center for Energy, Environment and Ecology Research, UR-BNU, School of Environment, Beijing Normal Univ., Beijing 100875, China; Environmental Systems Engineering Program, Univ. of Regina, Regina, Saskatchewan, Canada S4S 0A2 (corresponding author).
3. Professor, State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Beijing Normal Univ., Beijing 100875, China.
4. Centre for Environment and Sustainability, Univ. of Surrey, Guildford GU2 7XH, UK.
5. Institute of Energy, Peking Univ., Beijing 100871, China.