1 Department of Environmental Science and Engineering, School of Environmental Studies, China University of Geosciences, Wuhan, 430074, China. aqeel@cug.edu.cn.
2 International Water, Air & Soil Conservation Society, 59200, Kuala Lumpur, Malaysia. aqeel@cug.edu.cn.
3 Department of Environmental Science and Engineering, School of Environmental Studies, China University of Geosciences, Wuhan, 430074, China. faheem@cug.edu.cn.
4 Tianjin Key Laboratory of Indoor Air Environmental Quality Control, School of Environment Science & Engineering, Tianjin University, 300072, Tianjin, People's Republic of China.