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

TY - JOUR

T1 - 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

AU - Zhou, Yongqiang

AU - Jeppesen, Erik

AU - Zhang, Yunlin

AU - Shi, Kun

AU - Liu, Xiaohan

AU - Zhu, Guangwei

PY - 2016/2

Y1 - 2016/2

N2 - 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.

AB - 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.

KW - Chromophoric dissolved organic matter (CDOM)

KW - Drinking water

KW - Lake Qiandao

KW - Point-source contamination

KW - Fluorescence

KW - PARALLEL FACTOR-ANALYSIS

KW - PARAFAC ANALYSIS

KW - TREATMENT-PLANT

KW - QUALITY

KW - RIVER

KW - SPECTROSCOPY

KW - TERRESTRIAL

KW - ESTUARY

KW - CARBON

KW - SEA

U2 - 10.1016/j.chemosphere.2015.09.027

DO - 10.1016/j.chemosphere.2015.09.027

M3 - Journal article

C2 - 26397467

SN - 0045-6535

VL - 144

SP - 503

EP - 509

JO - Chemosphere

JF - Chemosphere

ER -