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dc.contributor.author김성한-
dc.date.accessioned2018-06-14T05:44:29Z-
dc.date.available2018-06-14T05:44:29Z-
dc.date.issued2017-05-
dc.identifier.citationWATER RESEARCH, v. 121, Page. 150-161en_US
dc.identifier.issn0043-1354-
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S0043135417303810-
dc.identifier.urihttps://repository.hanyang.ac.kr/handle/20.500.11754/72071-
dc.description.abstractIn order to understand the characteristics and dynamics of dissolved organic matter (DOM) in the sediment of rivers affected by impoundments, we examined the vertical profiles and the benthic fluxes of DOM in four different core sediments located at upstream sites of weirs in major rivers of South Korea. In three out of four sites, exponential accumulation of dissolved organic carbon (DOC) with depth was observed with the signature of seasonal variability. Except for the site displaying a below-detection limit of Fe(II), the general accumulation trends of DOC with depth was concurrent with the increases of Fe(II) and NH4+ and the decrease of PO43-, signifying a close linkage of the DOM dynamics with anaerobic respiration via iron reduction, an important early diagenesis pathway. The estimated benthic fluxes from the cores revealed that the sediments likely serve as DOC, chromophoric DOM (CDOM), and fluorescent DOM (FDOM) sources to the overlying water. The benthic effluxes based on DOC were comparable to the ranges previously reported in lake and coastal areas, and those of CDOM and FDOM showed even higher levels. These findings imply that impoundment-affected river systems would change the DOM composition of the overlying water, ultimately influencing the subsequent water treatment processes such as disinfection byproducts production and membrane fouling. A simple mass balance model indicated that the impoundment-affected river sediments may operate as a net carbon sink in the environments due to a greater extent of sedimentation compared to the estimated benthic efflux and sediment biological respiration. (C) 2017 Elsevier Ltd. All rights reserved.en_US
dc.description.sponsorshipThis work was supported by a National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIP) (No. 2014R1A2A2A09049496). Additional support was provided by the National Institute of Environmental Research in Korea. Special thanks go to Ms. Yun-Kyung Lee and Dr. Mi-Hee Lee for their kind assistance in laboratory analyses and related language communication.en_US
dc.language.isoen_USen_US
dc.publisherPERGAMON-ELSEVIER SCIENCE LTDen_US
dc.subjectDOMen_US
dc.subjectPore wateren_US
dc.subjectEEM-PARAFACen_US
dc.subjectImpoundmenten_US
dc.subjectBenthic fluxen_US
dc.subjectMass balanceen_US
dc.subjectCARBON BURIAL EFFICIENCYen_US
dc.subjectARCTIC-OCEAN SEDIMENTSen_US
dc.subjectOXYGEN EXPOSURE TIMEen_US
dc.subjectFLUORESCENCE SPECTROSCOPYen_US
dc.subjectPORE WATERSen_US
dc.subjectCONSTRUCTED RESERVOIRen_US
dc.subjectMOLECULAR-WEIGHTen_US
dc.subjectMARINEen_US
dc.subjectCOASTALen_US
dc.subjectTERRESTRIALen_US
dc.titleDynamics of dissolved organic matter in riverine sediments affected by weir impoundments: Production, benthic flux, and environmental implicationsen_US
dc.typeArticleen_US
dc.relation.volume121-
dc.identifier.doi10.1016/j.watres.2017.05.022-
dc.relation.page150-161-
dc.relation.journalWATER RESEARCH-
dc.contributor.googleauthorChen, Meilian-
dc.contributor.googleauthorKim, Sung-Han-
dc.contributor.googleauthorJung, Heon-Jae-
dc.contributor.googleauthorHyun, Jung-Ho-
dc.contributor.googleauthorChoi, Jung Hyun-
dc.contributor.googleauthorLee, Hyo-Jin-
dc.contributor.googleauthorHuh, In-Ae-
dc.contributor.googleauthorHur, Jin-
dc.relation.code2017003042-
dc.sector.campusE-
dc.sector.daehakRESEARCH INSTITUTE[E]-
dc.sector.departmentINSTITUTE OF OCENA AND ATMOSPHERIC SCIENCES-
dc.identifier.pidshkim1778-
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