1. Guangdong Provincial Key Laboratory of Environmental Health and Land Resource, School of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing 526061, China
2. School of Environmental and Chemical Engineering, Foshan University, Foshan 528000, China
3. School of Foreign Studies, South China Agricultural University, Guangzhou 510640, China
4. College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China
5. School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China