The composition of humic substances isolated from mongolian brown coal

Methods of elemental analysis, gel-filtration, potentiometry, IR and UV spectroscopy and also 13C NMR were used to study the specific structural features of humic substances separated from low-metamorphized low-calorie brown coal and its residue left after the separation of free humic substances and oxidized by a solution of nitric acid. Treatment of brown coal with nitric acid (15%) leads to an increase in the yield of humics, a change in the content of functional groups and also to the degradation and nitration of the macromolecules. © 2006 by Allerton Press, Inc.

Журнал
Номер выпуска
4
Язык
Английский
Страницы
11-17
Статус
Опубликовано
Том
39
Год
2005
Организации
  • 1 Institute of Petroleum and Coal Chemical Synthesis, Irkutsk State University, Russian University of Peoples' Friendship, Russian Federation
Ключевые слова
Functional groups; Humic substances; Low-calories; Low-metamorphized; Infrared spectroscopy; Macromolecules; Nitric acid; Nuclear magnetic resonance; Oxidation; Potentiometers (electric measuring instruments); Solutions; Ultraviolet spectroscopy; Lignite
Дата создания
19.10.2018
Дата изменения
19.10.2018
Постоянная ссылка
https://repository.rudn.ru/ru/records/article/record/3424/