Thanks very much for this comment. With a turbulent current and dozens of kilometers in length, this river is located in the mountains of Foshan city. The PPCPs sludge at the bottom of the river never executes removal. Thanks for the suggestion from the reviewer. We will further precipitate the PPCPs sludge before the water treatment plant or excavate the PPCPs sludge from the river and study the effects on drinking water quality. The relevant results will be published in another paper in the future.
Response 7: Thank you very much for your kind reminder.