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Acid-base properties of fractionated humic acids

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26310%2F08%3APU75686" target="_blank" >RIV/00216305:26310/08:PU75686 - isvavai.cz</a>

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    Acid-base properties of fractionated humic acids

  • Original language description

    Humic acids (HA) were fractionated by their dissolution in universal buffers (NaOH, H3BO3, H3PO4 and CH3COOH) with various pH-values. Obtained fractions were characterized by UV/VIS and FT-IR spectroscopy and their acid-base properties were studied. It was found that contain of acidic groups in majority of individual fractions is higher than the content of original HA samples. Our hypothesis is that HA structure is changed during fractionation. HA can interact with individual components of buffer and re-arranged their structure, which results in apparently higher acidity of obtained fractions. The re-arrangement of HA structure probably causes, that some acidic groups inside HA aggregates, which are not able dissociate in original HA sample, can contribute to measured acidity in individual fractions. Surprising result is that residue after dissolving original HA in very alkaline buffer (pH = 12) has after fractionation (and "exhaustion" of the largest amount of HA fraction) several tim

  • Czech name

    Acido-bazické vlastnosti frakcionovaných huminových kyselin

  • Czech description

    Huminové kysely byly rozděleny do frakcí rozpouštěním v pufrech o různých hodnotách pH, získané frakce byly charakterizovány zejména s ohlede na jejich acido-bazické vlastnosti.

Classification

  • Type

    J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    CF - Physical chemistry and theoretical chemistry

  • OECD FORD branch

Result continuities

  • Project

  • Continuities

    Z - Vyzkumny zamer (s odkazem do CEZ)

Others

  • Publication year

    2008

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Chemické listy

  • ISSN

    1213-7103

  • e-ISSN

  • Volume of the periodical

    102

  • Issue of the periodical within the volume

    S

  • Country of publishing house

    CZ - CZECH REPUBLIC

  • Number of pages

    2

  • Pages from-to

  • UT code for WoS article

  • EID of the result in the Scopus database