title: [Linking optical properties of dissolved organic matter with NDMA formation potential in the Huangpu River].
abstract: Surface water samples from the Huangpu River were filtered to measure the UV absorption and fluorescence spectrum. Dissolved organic carbon (DOC), N-nitrosodimethylamine (NDMA), and its formation potential (NDMA-FP) were also analyzed to explore relationships between the properties of dissolved organic matter (DOM) and the formation potential of disinfection byproducts-NDMA in the Huangpu River. The study found that: NDMA-FP concentration increased with the increasing of DOC concentration (r = 0.487, P < 0.01), but it had negative relationships with SUVA254 and HIX (r = -0.605, P < 0.01; r = -0.396, P < 0.01). NDMA-FP concentration had positive relationships with the fluorescence intensity of protein-like substances such as low-molecular-weight (LMW) tyrosine-like and tryptophan-like substances (r = 0.421, P < 0.01; r = 0.426, P < 0.01), but had a negative relationship with humic-like substance (r = -0.422, P < 0.01). Therefore, NDMA formation potential increases with the increasing DOM content in the Huangpu River, which is significantly related with the protein-like substances, but decreases with the increasing aromaticity and humification of DOM.
authors.forename: Qian-Qian
authors.initials: QQ
authors.lastname: Dong
authors.forename: Ai
authors.initials: A
authors.lastname: Zhang
authors.forename: Yong-Mei
authors.initials: YM
authors.lastname: Li
authors.forename: Ling
authors.initials: L
authors.lastname: Chen
authors.forename: Qing-Hui
authors.initials: QH
authors.lastname: Huang
mesh_terms: D002244:Carbon / Q000737:chemistry; D002681:China; D004128:Dimethylnitrosamine / Q000737:chemistry*; D004202:Disinfectants / Q000737:chemistry; D005453:Fluorescence; D045483:Rivers / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet
chemical_list: D004202:Disinfectants; D002244:Carbon; D004128:Dimethylnitrosamine