ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Impact of an Anionic Surfactant Addition on Solubility of Humic Acid in Acid-Alkaline Solutions

I. S. Shaban and V. Mikulaj

Department of Nuclear Chemistry, Faculty of Natural Sciences, Comenius University, SK-842 15 Bratislava

Abstract: The solubility of humic acid (HA) is a very important factor in the study of its interaction with metal ions and radionuclides. The solubility of HA as a function of hydrogen ion concentration was studied. It has been found that chemical behaviour of HA is similar to other polyelectrolytes. Solubility depends on pH, ionic strength, and many other factors. Unmonotonous character of the solubility curve in relationship with pH may be connected with conformation changes of HA saturated solutions. The results show that the addition of anionic surfactant to HA saturated solution can influence the solubility curve of HA.

Full paper in Portable Document Format: 526a753.pdf

Chemical Papers 52 (6) 753–755 (1998)