The correlation analysis of TOC, CODCr and fluorescence characteristics in MPR Xi Tian, Ying Liu, Chunling Zhao, Xiaona Ji, Zhiming Ren and Dejun Bian E3S Web Conf., 194 (2020) 04014 Published online: 15 October 2020 DOI: 10.1051/e3sconf/202019404014