1. Monitoring Department, Henan Bangtai Heli Management Consulting Co., Ltd., Zhengzhou, China
2. Department of Environmental Engineering and Chemistry, Luoyang Institute of Science and Technology, Luoyang, China
3. Zhengzhou Yutong Bus Co., Ltd., Zhengzhou, China
4. College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, China