土炭 흄酸의 性狀 및 應用에 關한 硏究 (I) 흄酸의 溶出 및 그 條件에 따른 흄酸性狀의 變異

Studies on the Characteristics of Humic Acid and its Utilizations (I)

  • 발행 : 19681200

초록

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 $^{\circ}C$. 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), $-CH_2CO-$, $-CH_2{\cdot}O{\cdot}CH_2-$ and aromatic rings were varied according to the concentration of alkaline solution, temperature and time when the humic acids were extracted with alkali.

키워드

참고문헌

  1. 日本燃料協誌 v.27 통구경삼
  2. 日本燃料協誌 v.33 통구경삼;澁谷裕
  3. C.A. v.65-4 K.V. Ryashentsev(et al.)
  4. 日本燃料協誌 v.38 大飼豊春;澁谷裕
  5. 全北大學敎論文集 v.6 金源澤
  6. Fuel v.19 C.L. Arnold;A. Lowy;R. Thissen