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Open AccessArticle

Fluorescence Characteristics of Dissolved Organic Matter (DOM) in Percolation Water and Lateral Seepage Affected by Soil Solution (S-S) in a Lysimeter Test

1
Department of Civil Engineering, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan
2
Department of Environmental Science and Engineering, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan
*
Author to whom correspondence should be addressed.
Sensors 2019, 19(18), 4016; https://doi.org/10.3390/s19184016
Received: 5 July 2019 / Revised: 6 September 2019 / Accepted: 14 September 2019 / Published: 17 September 2019
(This article belongs to the Section Optical Sensors)
The composition and structure of dissolved organic matter (DOM) are sensitive indicators that guide the water infiltration process in soil. The DOM chemical composition in seepage affects river water quality and changes soil organic matter (SOM). In this lysimeter test study, fluorescence spectra and optical indices were used to examine the interaction between the percolation water (P-W) and leachate water (L-W) DOMs affected by the soil solution (S-S). The L-W DOM had a higher aromaticity (SUVA254), average molecular weight (S275-295) and terrestrial source (fluorescence index (FI)), but fewer autochthonous sources (biological index (BIX)) than the P-W DOM. Organic carbon standardization (OCS) and protein- (PLF), fulvic- (FLF) and humic-like fluorescence (HLF) intensity showed that L-W DOM increased 44%, 55% and 81%, respectively, compared to the P-W DOM. The linear regression slopes between OCS FLF and PLF were 0.62, 1.74 and 1.79 for P-W, L-W and S-S, respectively. The slopes between OCS HLF and PLF were 0.15, 0.58 and 0.64 for P-W, L-W and S-S, respectively. The P-W DOM was in contact with the soil litter layer, where S-S labile lignin phenolic compounds released and dissolved into the L-W DOM. This increased its aromaticity, and extent of humification. View Full-Text
Keywords: dissolved organic matter; soil solution; lysimeter test; fluorescence spectra; optical indices dissolved organic matter; soil solution; lysimeter test; fluorescence spectra; optical indices
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MDPI and ACS Style

Chiu, T.-P.; Huang, W.-S.; Chen, T.-C.; Yeh, Y.-L. Fluorescence Characteristics of Dissolved Organic Matter (DOM) in Percolation Water and Lateral Seepage Affected by Soil Solution (S-S) in a Lysimeter Test. Sensors 2019, 19, 4016.

AMA Style

Chiu T-P, Huang W-S, Chen T-C, Yeh Y-L. Fluorescence Characteristics of Dissolved Organic Matter (DOM) in Percolation Water and Lateral Seepage Affected by Soil Solution (S-S) in a Lysimeter Test. Sensors. 2019; 19(18):4016.

Chicago/Turabian Style

Chiu, Teng-Pao; Huang, Wei-Shiang; Chen, Ting-Chien; Yeh, Yi-Lung. 2019. "Fluorescence Characteristics of Dissolved Organic Matter (DOM) in Percolation Water and Lateral Seepage Affected by Soil Solution (S-S) in a Lysimeter Test" Sensors 19, no. 18: 4016.

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