Humic Preparations from Brown Coal and Peat
and Methods for Their Demineralization

I. I. Lishtvan, Yu. G. Yanuta, A. M. Abramets, V. P. Strigutskii, and Yu. Yu. Navosha

Institute for Nature Management, Belarussian Academy of Sciences, ul. F. Skoriny 10, Minsk, 220114 Belarus

e-mail: yanuta@tut.by

Received October 3, 2012

Abstract—The demineralization processes of humic substances of different genesis were studied. It was found
that the ash components of humic substances from brown coals and peat have different nature, and their dem-
ineralization with the use of traditional methods does not make it possible to completely remove ash compo-
nents. It was established that the removal of Fe³⁺ from humic substances can be performed only with the use of
hydrofluoric acid (HF). The method of their demineralization was substantiated.

DOI: 10.3103/S0361521913030026

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