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dc.contributor.author신경훈-
dc.date.accessioned2019-01-15T02:00:21Z-
dc.date.available2019-01-15T02:00:21Z-
dc.date.issued2018-08-
dc.identifier.citationWATER RESEARCH, v. 147, Page. 164-176en_US
dc.identifier.issn0043-1354-
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S0043135418307632-
dc.identifier.urihttps://repository.hanyang.ac.kr/handle/20.500.11754/81281-
dc.description.abstractDespite numerous studies on changes to optical proxies of dissolved organic matter (DOM) by biogeochemical processing, the applicability of commonly-used spectroscopic indices has not been explored as DOM source tracking tools under conditions where biogeochemical processes may alter them. For this study, two contrasting DOM end members, Suwannee River fulvic acid (SRFA) and algogenic DOM (ADOM), and their mixtures, were used to examine the potential changes in the conservative mixing behaviors of several well-known optical indices via end member mixing analysis under the influence of biodegradation, UV irradiation, and clay mineral (kaolin) adsorption. Most of the source tracking indices exhibited large deviations from conservative mixing behavior between the two end-members. Biodegradation tended to lower the portions of labile and ADOM in the mixtures, while the allochthonous end member (SRFA) was reduced by a greater extent after the process of UV irradiation or adsorption. The extent of the variations in biological index (BIX) and fluorescence index (FI) was smaller for more allochthonous DOM mixtures under the processes of biodegradation and UV irradiation. Overall, the process-driven variations in ratios of humic-like: protein-like fluorescence (as modeled by parallel factor analysis, PARAFAC) were greater for the SRFA versus ADOM. Evaluation criteria used in this study suggested that BIX, specific UV absorbance (SUVA), and Fl each could be the reliable discrimination parameter least affected by biodegradation, UV irradiation, and adsorption, respectively. This study provided criterion information for the choice and the interpretation of the optical indices for DOM source discrimination in aquatic environments after substantial biogeochemical processing. (C) 2018 Elsevier Ltd. All rights reserved.en_US
dc.description.sponsorshipThis work was supported by a National Research Foundation of Korea, South Korea (NRF) grant funded by the Korean government (MSIP) (No. 2017R1A4A1015393). CLO thanks North Carolina State University for providing academic release time to work on this study.en_US
dc.language.isoen_USen_US
dc.publisherPERGAMON-ELSEVIER SCIENCE LTDen_US
dc.subjectDissolved organic matteren_US
dc.subjectSpectroscopic indicesen_US
dc.subjectEnd member mixing analysisen_US
dc.subjectBiodegradationen_US
dc.subjectUV irradiationen_US
dc.subjectAdsorptionen_US
dc.titleNew insight into the applicability of spectroscopic indices for dissolved organic matter (DOM) source discrimination in aquatic systems affected by biogeochemical processesen_US
dc.typeArticleen_US
dc.relation.volume147-
dc.identifier.doi10.1016/j.watres.2018.09.048-
dc.relation.page164-176-
dc.relation.journalWATER RESEARCH-
dc.contributor.googleauthorLee, Mi-Hee-
dc.contributor.googleauthorOsburn, Christopher L.-
dc.contributor.googleauthorShin, Kyung-Hoon-
dc.contributor.googleauthorHur, Jin-
dc.relation.code2018003034-
dc.sector.campusE-
dc.sector.daehakCOLLEGE OF SCIENCE AND CONVERGENCE TECHNOLOGY[E]-
dc.sector.departmentDEPARTMENT OF MARINE SCIENCE AND CONVERGENCE ENGINEERING-
dc.identifier.pidshinkh-


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