1. Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, China
2. Guangzhou Environmental Protection Investment Group Co., Ltd., Guangzhou 510170, China
3. Chengdu Academy of Environmental Sciences, Chengdu 610072, China
4. Department of Environmental and Occupational Health, School of Public Health, Texas A&M University, College Station, Texas 77843, USA