1. School of Environmental Engineering and Chemistry, Luoyang Institute of Science and Technology, Luoyang Henan 471023, People’s Republic of China
2. Department of Mathematical Sciences, Zibo Normal College, Zibo Shandong 255130, People’s Republic of China
3. School of of Civil Engineering, Luoyang Institute of Science and Technology, Luoyang Henan 471023, People’s Republic of China