1. Tianjin Key Laboratory of Urban Transport Emission Research, State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China
2. Environmental Monitoring Center of Tianjin Economic Technological Development Area, Tianjin 300457, China
3. Tianjin Economic Technological Development Area Ecology and Environment Bureau, Tianjin 300450, China
4. State Environmental Protection Key Laboratory of Odor Pollution Control, Tianjin Academy of Eco-Environmental Sciences, Tianjin 300191, China