PMID: 20108658Jan 30, 2010Paper

Characterization of dissolved organic matter fractions from Lake Hongfeng, Southwestern China Plateau

Journal of Environmental Sciences (China)
Liying WangHaiqing Liao

Abstract

With XAD-series and ion exchange resins, dissolved organic matter (DOM) from Lake Hongfeng in Southwestern China Plateau was isolated into 6 fractions, i.e., humic acid (HA), fulvic acid (FA), hydrophobic neutrals (HON), hydrophilic acids (HIA), hydrophilic bases (HIB) and hydrophilic neutrals (HIN). Those fractions were characterized by high performance size exclusion chromatography, fluorescence spectroscopy and UV absorbance. Among the 6 fractions, FA was predominant and accounted for 51% of the total DOM. The weight-average (Mw) and number-averaged (Mn) molecular weight of these fractions ranged from 1688 to 2355 Da and from 1338 to 1928 Da, respectively. A strong correlation was observed between specific UV absorbance at 280 nm, E2/E3 (absorbance at 250 nm to 365 nm), and the molecular weight for DOM fractions. UV-Vis fulvic-like fluorescence peaks were found in all fractions. Protein-like fluorescence peaks existed in HON may indicate that microbial activity was severely in Lake Hongfeng. There was a significant relationship between fluorescence intensities and specific UV absorbance at 254 nm for those DOM fractions, suggesting their similar luminescence characteristics. The values of fluorescence index (f450/500) indica...Continue Reading

Citations

May 15, 2013·Environmental Science and Pollution Research International·Xiaoxia QuFengchang Wu
Aug 8, 2015·International Journal of Molecular Sciences·Maud LeloupGeneviève Feuillade-Cathalifaud
Nov 7, 2013·Journal of Environmental Sciences (China)·Maud LeloupGeneviève Feuillade-Cathalifaud
Oct 5, 2015·The Science of the Total Environment·Francisco J RodríguezMaría García-Valverde
Dec 28, 2017·Environmental Science and Pollution Research International·Guangchun ShanQunliang Li
Apr 27, 2019·Environmental Science and Pollution Research International·Lei XuFanhao Song
Apr 15, 2019·Environmental Science and Pollution Research International·Jie XieQitang Wu
Sep 21, 2011·Environmental Science & Technology·Xilong WangBaoshan Xing
Feb 18, 2020·Environmental Science & Technology·Sarah B PartanenKristopher McNeill
Apr 21, 2020·Ecotoxicology and Environmental Safety·Xiangyang GuiJianfei Wang

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