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Characterization of supramolecular humic material obtained from lake dredged sediments by Humeomics and spectroscopy methods.

Prova, Samira Rifat
http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1684919390991381

Abstract Details

2023, Master of Science (MS), Bowling Green State University, Geology.
In the last decades, the Western Lake Erie Basin (WLEB), USA, has been experiencing harmful algae bloom (HABs) events attributed to the large export of phosphate (PO4-3) and nitrate (NO3-) loads into waterways from farmland. There is current concern about exacerbating the HABs at the WLEB by discarding dredged materials (DM) in open lake waters. The State of Ohio has prohibited open lake water disposal, and it is requesting beneficial uses for the DM, and this study is exploring amending farm soil with DM. Previous research has demonstrated benefits on soil health when Hoytville soil was amended with DM from Toledo Harbor, OH, as the DM contains adequate soil organic matter (SOM) and calcium content. This study aimed to characterize the SOM in the DM by conducting a gentle chemical sequential extraction named Humeomics. Total organic carbon, total phosphorous, total nitrogen, and organic moieties associated with the SOM organo-soluble and hydro-soluble extracted fractions were characterized. Emission and excitation matrices were collected and paired with Parallel Factor analysis (PARAFAC) to characterize SOM fluorophores. The organo-soluble fractions exhibited terrestrial humic-like, terrestrial fulvic-like, and microbial tryptophan-like components. The hydro-soluble fractions showed microbial and humic-like and terrestrial or freshwater humic-like components. TOC concentrations in the organo-soluble and hydro-soluble fractions ranged from 594,022 to 483,723 mg kg-1 and 299,777 to 60,830 mg kg-1, respectively. Total phosphorus in the organo-soluble and hydro-soluble fractions ranged from 920.32 to 509.94 mg kg-1 and 31,389 to 182 mg kg-1, respectively. And total nitrogen in the organo-soluble and hydro-soluble fractions ranged from 11,614.47 to 2,879.86 mg kg-1 and 16,505.86 to 4,087.97 mg kg-1, respectively. Fourier-transform infrared spectroscopy analysis confirmed the presence of O-H (3400 cm-1), carbonyl (1720 cm-1), alcohol (3600-3000 cm-1), alkane (2915cm-1), aldehyde (2848 cm-1), C-H bending (1460 cm-1, 1376 cm-1, and 720 cm-1) for the methylene functional groups, and finally the medium vibration at 1030 cm-1 could be C-N (amine) in the organo-soluble fractions. Furthermore, hydro-soluble fractions, the Amine group (3199 cm-1), alcohol (3300 cm-1), unsaturated ester (1720 cm-1), and C=C (1630 cm-1), and possible Si-O (1020-1030 cm-1) were identified. Adding DM to farm soils will diversify the bioavailable SOM and incorporate associated nitrogen and phosphorus nutrients.
Angélica Vázquez-Ortega, Ph.D. (Committee Chair)
Joseph Furgal, Ph.D. (Committee Member)
Christopher Ward, Ph.D. (Committee Member)
127 p.
Environmental Geology; Geochemistry; Soil Sciences
soil organic matter; humic material; lake dredged sediments; Humeomics chemical extraction; supramolicular; fluorescence spectroscopy; PARAFAC; Western Lake Erie Basin; harmful algae bloom;

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Citations

  • Prova, S. R. (2023). Characterization of supramolecular humic material obtained from lake dredged sediments by Humeomics and spectroscopy methods. [Master's thesis, Bowling Green State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1684919390991381

    APA Style (7th edition)

  • Prova, Samira Rifat. Characterization of supramolecular humic material obtained from lake dredged sediments by Humeomics and spectroscopy methods. 2023. Bowling Green State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1684919390991381.

    MLA Style (8th edition)

  • Prova, Samira Rifat. "Characterization of supramolecular humic material obtained from lake dredged sediments by Humeomics and spectroscopy methods." Master's thesis, Bowling Green State University, 2023. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1684919390991381

    Chicago Manual of Style (17th edition)

bgsu1684919390991381
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© 2023, all rights reserved.
This open access ETD is published by Bowling Green State University and OhioLINK.