1. a Shenzhen Academy of Environmental Sciences, Shenzhen 518001, China
2. b State Environmental Protection Key Laboratory of Drinking Water Source Management and Technology, Shenzhen 518001, China
3. c China Water Resources Pearl River Planning Surveying & Designing Co., Ltd, Guangzhou 510610, China
4. d Engineering and Technology Research Center for Agricultural Land Pollution Integrated Prevention and Control of Guangdong Higher Education Institute, College of Resources and Environment, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China