Differences in spectroscopic characteristics between dissolved and particulate organic matters in sediments: Insight into distribution behavior of sediment organic matter

The Science of the Total Environment
Wei HeJin Hur

Abstract

In this study, we examined the distribution behavior of sediment organic matter (SOM) between dissolved and particulate phases and the potential influencing factors by comparing the spectroscopic features of pore water organic matter (PWOM) and alkaline-extractable organic matter (AEOM) of river sediments. The characteristics of SOM were described by several selected spectral indicators and fluorescence excitation emission matrix (EEM)-parallel factor analysis (PARAFAC). The spectral indicators showed that larger sized SOM molecules with a higher aromatic content were more enriched in sediment particles than in pore water. The relative ratios of humification index between dissolved and particulate phases revealed that the SOM constituents with a higher degree of structural condensation were preferentially distributed onto sediment particles. EEM-PARAFAC demonstrated different distribution behaviors of protein-like (tyrosine-like and tryptophan-like) and humic-like substances in sediments. The relative abundance of tyrosine-like component was much higher in PWOM than in AEOM, whereas the other three components tended to be more abundant in AEOM. The predominant presence of tyrosine-like component suggests its potential operation...Continue Reading

References

Jul 1, 2004·Environmental Science & Technology·Johan ErikssonUlf Skyllberg
Nov 1, 2005·Journal of Colloid and Interface Science·Jin Hur, Mark A Schlautman
Feb 12, 2008·Langmuir : the ACS Journal of Surfaces and Colloids·Seunghun Kang, Baoshan Xing
Nov 13, 2010·Environmental Science & Technology·Kathleen R MurphyGeorge R Aiken
Jan 18, 2012·Environmental Science and Pollution Research International·Ezzhora NkhiliClaire Richard
Jul 17, 2012·The Science of the Total Environment·Dolly N KothawalaLars J Tranvik
Jul 19, 2012·Environmental Science & Technology·Christopher L OsburnMichael T Montgomery
Jun 5, 2013·Proceedings of the National Academy of Sciences of the United States of America·Thomas RiedelThorsten Dittmar

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Citations

Aug 14, 2020·Ecotoxicology and Environmental Safety·Lin WuErping Bi
Nov 21, 2020·Environmental Science & Technology·Yaxin ZhengXiaomeng Li
Aug 26, 2021·Environmental Science & Technology·Emma L TrainerChristina K Remucal
Jul 31, 2019·Water Research·Morgane DerrienRafael Gonçalves-Araujo

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