IDEAS home Printed from https://ideas.repec.org/a/gam/jijerp/v19y2022i13p7838-d848378.html
   My bibliography  Save this article

Spectroscopic Characteristics and Speciation Distribution of Fe(III) Binding to Molecular Weight-Dependent Standard Pahokee Peat Fulvic Acid

Author

Listed:
  • Yaqin Zhang

    (College of Water Sciences, Beijing Normal University, Beijing 100875, China
    Engineering Research Center of Groundwater Pollution Control and Remediation, Ministry of Education of China, Beijing 100875, China
    These authors contributed equally to this work.)

  • Chang Liu

    (College of Water Sciences, Beijing Normal University, Beijing 100875, China
    Engineering Research Center of Groundwater Pollution Control and Remediation, Ministry of Education of China, Beijing 100875, China
    These authors contributed equally to this work.)

  • Yuxia Li

    (College of Water Sciences, Beijing Normal University, Beijing 100875, China
    Engineering Research Center of Groundwater Pollution Control and Remediation, Ministry of Education of China, Beijing 100875, China)

  • Liuting Song

    (College of Water Sciences, Beijing Normal University, Beijing 100875, China
    Engineering Research Center of Groundwater Pollution Control and Remediation, Ministry of Education of China, Beijing 100875, China)

  • Jie Yang

    (College of Water Sciences, Beijing Normal University, Beijing 100875, China
    Engineering Research Center of Groundwater Pollution Control and Remediation, Ministry of Education of China, Beijing 100875, China)

  • Rui Zuo

    (College of Water Sciences, Beijing Normal University, Beijing 100875, China
    Engineering Research Center of Groundwater Pollution Control and Remediation, Ministry of Education of China, Beijing 100875, China)

  • Jian Li

    (College of Water Sciences, Beijing Normal University, Beijing 100875, China
    Engineering Research Center of Groundwater Pollution Control and Remediation, Ministry of Education of China, Beijing 100875, China)

  • Yanguo Teng

    (College of Water Sciences, Beijing Normal University, Beijing 100875, China
    Engineering Research Center of Groundwater Pollution Control and Remediation, Ministry of Education of China, Beijing 100875, China)

  • Jinsheng Wang

    (College of Water Sciences, Beijing Normal University, Beijing 100875, China
    Engineering Research Center of Groundwater Pollution Control and Remediation, Ministry of Education of China, Beijing 100875, China)

Abstract

Peat-derived organic matter, as powerful chelators, is of great significance for the transport of Fe to the ocean and the enhancement of dissolved Fe. However, the iron binding capacity of molecular weight (MW)-fractionated dissolved organic matter is variable, due to its structure and composition heterogeneity. In this work, we used the standard Pahokee Peat fulvic acid (PPFA) as an example, and investigated the spectroscopy properties and Fe(III) binding ability of PPFA and different molecular weight fractions by UV–Vis absorbance and fluorescence spectroscopy and the Donnan Membrane Technique (DMT). The results showed binding sites for Fe(III) at the 263 nm and >320 nm regions in differential absorbance spectra. Upon increasing the iron concentration to 18.00 μmol·L −1 , the critical binding capacity was exceeded, which resulted in a decrease in absorbance. Fe(III) was found to prefer to bind to humic-like components, and ultraviolet humic-like fluorophores displayed stronger binding strength. High molecular weight PPFA fractions (>10 kDa) possessed more aromatic and hydrophobic components, displayed a higher degree of humification, and exhibited higher metal binding potential. Furthermore, the speciation analysis and stability constant ( c K) were calculated using Donnan membrane equilibrium. The correlation between c K values and PPFA spectral properties demonstrated that aromaticity, hydrophobicity, molecular weight and humification degree were crucial indices of PPFA–Fe(III) affinity. Significantly, the humification degree, represented by HIX, showed the strongest correlation (r = 0.929, p = 0.003), which could be used to estimate the binding strength. This study provides further understanding of the complexation mechanism of iron and DOM in the peat environment and identifies the considerable effect of molecular weight.

Suggested Citation

  • Yaqin Zhang & Chang Liu & Yuxia Li & Liuting Song & Jie Yang & Rui Zuo & Jian Li & Yanguo Teng & Jinsheng Wang, 2022. "Spectroscopic Characteristics and Speciation Distribution of Fe(III) Binding to Molecular Weight-Dependent Standard Pahokee Peat Fulvic Acid," IJERPH, MDPI, vol. 19(13), pages 1-18, June.
  • Handle: RePEc:gam:jijerp:v:19:y:2022:i:13:p:7838-:d:848378
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1660-4601/19/13/7838/pdf
    Download Restriction: no

    File URL: https://www.mdpi.com/1660-4601/19/13/7838/
    Download Restriction: no
    ---><---

    References listed on IDEAS

    as
    1. David A. Hutchins & Amy E. Witter & Alison Butler & George W. Luther, 1999. "Competition among marine phytoplankton for different chelated iron species," Nature, Nature, vol. 400(6747), pages 858-861, August.
    2. William G. Sunda & Susan A. Huntsman, 1997. "Interrelated influence of iron, light and cell size on marine phytoplankton growth," Nature, Nature, vol. 390(6658), pages 389-392, November.
    Full references (including those not matched with items on IDEAS)

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Rickels, Wilfried & Rehdanz, Katrin & Oschlies, Andreas, 2012. "Economic prospects of ocean iron fertilization in an international carbon market," Resource and Energy Economics, Elsevier, vol. 34(1), pages 129-150.
    2. Priester, C. Robert & Melbourne-Thomas, Jessica & Klocker, Andreas & Corney, Stuart, 2017. "Abrupt transitions in dynamics of a NPZD model across Southern Ocean fronts," Ecological Modelling, Elsevier, vol. 359(C), pages 372-382.
    3. Dragone, Giuliano & Fernandes, Bruno D. & Abreu, Ana P. & Vicente, António A. & Teixeira, José A., 2011. "Nutrient limitation as a strategy for increasing starch accumulation in microalgae," Applied Energy, Elsevier, vol. 88(10), pages 3331-3335.
    4. Ratnarajah, Lavenia & Melbourne-Thomas, Jessica & Marzloff, Martin P. & Lannuzel, Delphine & Meiners, Klaus M. & Chever, Fanny & Nicol, Stephen & Bowie, Andrew R., 2016. "A preliminary model of iron fertilisation by baleen whales and Antarctic krill in the Southern Ocean: Sensitivity of primary productivity estimates to parameter uncertainty," Ecological Modelling, Elsevier, vol. 320(C), pages 203-212.
    5. Rickels, Wilfried & Rehdanz, Katrin & Oschlies, Andreas, 2010. "Methods for greenhouse gas offset accounting: A case study of ocean iron fertilization," Ecological Economics, Elsevier, vol. 69(12), pages 2495-2509, October.
    6. Robert H. Lampe & Tyler H. Coale & Kiefer O. Forsch & Loay J. Jabre & Samuel Kekuewa & Erin M. Bertrand & Aleš Horák & Miroslav Oborník & Ariel J. Rabines & Elden Rowland & Hong Zheng & Andreas J. And, 2023. "Short-term acidification promotes diverse iron acquisition and conservation mechanisms in upwelling-associated phytoplankton," Nature Communications, Nature, vol. 14(1), pages 1-19, December.
    7. Marta Estrada & Maximino Delgado & Dolors Blasco & Mikel Latasa & Ana María Cabello & Verónica Benítez-Barrios & Eugenio Fraile-Nuez & Patricija Mozetič & Montserrat Vidal, 2016. "Phytoplankton across Tropical and Subtropical Regions of the Atlantic, Indian and Pacific Oceans," PLOS ONE, Public Library of Science, vol. 11(3), pages 1-29, March.
    8. Cao, Shan & Wang, Jiadao & Li, Dangguo & Chen, Darong, 2013. "Ecological and social modeling for migration and adhesion pattern of a benthic diatom," Ecological Modelling, Elsevier, vol. 250(C), pages 269-278.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:gam:jijerp:v:19:y:2022:i:13:p:7838-:d:848378. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.