1. Professor, School of Environmental and Safety Engineering, Changzhou Univ., Changzhou 213164, China.
2. School of Environmental and Safety Engineering, Changzhou Univ., Changzhou 213164, China.
3. Professor, School of Environmental and Safety Engineering, Changzhou Univ., Changzhou 213164, China (corresponding author).
4. Director, Changzhou Ganghua Gas Co., Ltd., 300 Changjiang, Zhong Lu, Zhonglou, Changzhou 213161, China.