Solvation excess of urea over water in humic acid in three-component solutions saturated with the biopolymer

S. Karabaev, I. Gainullina, A. Harchenko, M. Satarova, S. Lugovskoy, A. Pendin

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Humic acids were extracted from brown coals of the Kara-Keche deposit (Kyr-gyzstan) and characterized. The solubility of humic acid in aqueous urea solutions was studied. The solvation excess of urea over water on humic acid in solution was calculated. The possibility of simultaneous binding of urea molecules on three independent centers of hu-mic acids was shown. An estimation of humic acid molecular dimensions in aqueous urea solutions is given.

Original languageEnglish
Pages (from-to)1013-1019
Number of pages7
JournalJournal of Solution Chemistry
Volume41
Issue number6
DOIs
StatePublished - Jul 2012

Keywords

  • Autoexcess
  • Gibbs surface excess
  • Humic acid
  • Solubility
  • Solvation excess
  • Urea

Fingerprint

Dive into the research topics of 'Solvation excess of urea over water in humic acid in three-component solutions saturated with the biopolymer'. Together they form a unique fingerprint.

Cite this