Adsorption approach to the determination of the size and weight of humic acid molecules
DOI:
https://doi.org/10.15407/dopovidi2014.08.109Keywords:
adsorption approach, humic acid molecules, size, weightAbstract
The investigation of the state of sodium humate from “Aldrich” in an aqueous solution and on solid surfaces is performed using a complex of methods. It is shown that sodium humate in an aqueous solution at neutral pH and low ionic strength is in the associated state. It is found that the substance under study contains molecules with mass of 1, 3–6, and 15 kDa. A new adsorption approach to the determination of the size and the weight of humic acid molecules is proposed. The diameter of the smallest molecule is 2.3 nm, and the largest – 9.0 nm.
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