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Erik Jeppesen

Dissolved organic matter fluorescence at wavelength 275/342 nm as a key indicator for detection of point-source contamination in a large Chinese drinking water lake

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  • Yongqiang Zhou, Sino Danish Ctr Educ & Res SDC
  • ,
  • Erik Jeppesen
  • Yunlin Zhang, Chinese Academy of Sciences
  • ,
  • Kun Shi, Chinese Academy of Sciences
  • ,
  • Xiaohan Liu, University of Chinese Academy of Sciences
  • ,
  • Guangwei Zhu, Chinese Academy of Sciences

Surface drinking water sources have been threatened globally and there have been few attempts to detect point-source contamination in these waters using chromophoric dissolved organic matter (CDOM) fluorescence. To determine the optimal wavelength derived from CDOM fluorescence as an indicator of point-source contamination in drinking waters, a combination of field campaigns in Lake Qiandao and a laboratory wastewater addition experiment was used. Parallel factor (PARAFAC) analysis identified six components, including three humic-like, two tryptophan-like, and one tyrosine-like component. All metrics showed strong correlation with wastewater addition (r(2) > 0.90, p <0.0001). Both the field campaigns and the laboratory contamination experiment revealed that CDOM fluorescence at 275/342 nm was the most responsive wavelength to the point-source contamination in the lake. Our results suggest that pollutants in Lake Qiandao had the highest concentrations in the river mouths of upstream inflow tributaries and the single wavelength at 275/342 nm may be adapted for online or in situ fluorescence measurements as an early warning of contamination events. This study demonstrates the potential utility of CDOM fluorescence to monitor water quality in surface drinking water sources. (C) 2015 Elsevier Ltd. All rights reserved.

Original languageEnglish
JournalChemosphere
Volume144
Pages (from-to)503-509
Number of pages7
ISSN0045-6535
DOIs
Publication statusPublished - Feb 2016

    Research areas

  • Chromophoric dissolved organic matter (CDOM), Drinking water, Lake Qiandao, Point-source contamination, Fluorescence, PARALLEL FACTOR-ANALYSIS, PARAFAC ANALYSIS, TREATMENT-PLANT, QUALITY, RIVER, SPECTROSCOPY, TERRESTRIAL, ESTUARY, CARBON, SEA

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