Description of characteristics of humic substances from different waste materials

Unsal T., Ok S.

Bioresource Technology, cilt.78, sa.3, ss.239-242, 2001 (SCI-Expanded) identifier identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 78 Sayı: 3
  • Basım Tarihi: 2001
  • Doi Numarası: 10.1016/s0960-8524(01)00019-0
  • Dergi Adı: Bioresource Technology
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.239-242
  • Anahtar Kelimeler: humic acid, organic waste, ORGANIC WASTES, FRACTIONS, MATTER, ACIDS
  • Ankara Üniversitesi Adresli: Evet

Özet

Humic acids (HAs) extracted from different organic wastes have been characterised by chemical methods. The chemical properties of HAs showed differences depending on the source from which they were obtained. The C content in HAs from organic wastes (41.1-63.2%) fluctuated around the C value in soil HA with the exception of composted bark and tobacco dust. Compared with soil HA, the N contents of HAs from sewage sludge and brewery sludge were found much higher than the others. E4:E6 ratios for HAs in organic wastes were generally greater than that for soil HA, which indicated a low degree of condensation and humification. The carboxyl and phenolic-OH group contents ranged 0.51-2.23 and 11.1-20.7meqg-1, respectively. High values of carboxyl and phenolic-OH contents indicated that these materials were still within early stages of humification. Copyright © 2001 Elsevier Science Ltd.