1. Senior Environmental Scientist, Institute for Energy, Environment and Sustainable Communities, Regina, Saskatchewan S4S 7H9, Canada.
2. Canada Research Chair (Tier 1), Professor, Associate Dean, Faculty of Engineering and Applied Science, Univ. of Regina, Regina, Saskatchewan S4S 0A2, Canada (corresponding author).
3. Senior Environmental Scientist, Institute for Energy, Environment and Sustainable Communities, Regina, Saskatchewan S4S 0A2, Canada; State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Beijing Normal Univ., Beijing 100875, China.