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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 12, Number 4
JKCSEZ 12(4)
August 20, 1968 

Studies on the Characteristics of Humic Acid and its Utilizations (Ⅰ) Preparation Conditions of Humic Acids from Peat and their Effects on the Characteristics of Humic Acid

토탄 흄산의 성상 및 응용에 관한 연구 (Ⅰ) 흄산의 용출 및 그 조건에 따른 흄산성상의 변이
Won Taik Kim

On the extraction of humic acid from peat, the optimum conditions were studied and the effects of them on the characteristics of humic acid were also examined by means of infrared spectroscopy. 1. Pretreatment of peat with diluted 6-8% HCl solution for 5 hrs. prior to extraction with alcohol-benzol azeotropic mixture have resulted the better yield of humic acid. The water soluble Na-humates were obtained by the subsequent extraction with one hundred times quantity of caustic soda solutieon for 1hr. at 90 ℃. Thus the pure humic acids have been yielded approximately 40% (by wt.) from the raw peat. 2. In characteristics of humic acid, the chemical structure, mainly the contents of such functional groups as -COOH, -OH (phenol type), -CH2CO-, -CH2·O·CH2- and aromatic rings were varied according to the concentration of alkaline solution, temperature and time when the humic acids were extracted with alkali.
155 - 159
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