Hainan Normal University, affiliation not provided to SSRN, Quzhou University, affiliation not provided to SSRN, affiliation not provided to SSRN, Quzhou University, Quzhou University, Hainan Normal University - Key Laboratory of Water Pollution Treatment and Resource Reuse of Hainan Province and Hainan Normal University - Key Laboratory of Water Pollution Treatment and Resource Reuse of Hainan Province