CHEMICAL AND SPECTROSCOPIC MEASUREMENTS ON THE HUMIC ACIDS EXTRACTED FROM SOME ORGANIC COMPOSTS | ||
| Journal of Soil Sciences and Agricultural Engineering | ||
| Article 2, Volume 28, Issue 6, June 2003, Pages 5073-5082 PDF (1.65 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jssae.2003.244701 | ||
| Authors | ||
| A. A. Taha,; A. S. Modaihsh | ||
| Soli Sci. Dept., College of Agrlc., King Saud University, Saudi Arabia | ||
| Abstract | ||
| Humic acids were extracted from different composts and have been characterized by chemical and spectroscopiC methods. Meaningful differences il) the cornposiuon were revealed by UV. Visible and IR spectroscopies. The obtained data showed that carbon. hydrogen and nitrogen of the studied humic acids were slightly affected by the source of the humic acids, indicating thallhese humic aclds appeared to be closely related structurally. However, the CIH and OIH values for Yan-HA were higher than the other h~mic acids. This could Indicate that this humic acid Is more humified and in a more condensed state. The UV and VIsible spectra of the isolated humic acids .exhlblted the same trend showing no minimum or maximum absorpjion. San..HA and Enz-HA have the \coNes! value of E.JEe ratio Indicating 8 higher degr~e 01 aromatic condensation and low aliphatic structure. The IR spectra o( Ihe studied humic acids Indicated that, there was a broad similarity among the different humic aelds studied. The intensities of the absorption band vary slightly from one to other. They differ mainly in the ratios of the number of functional groups and the degr'1e of polymerization. On the other hand, humic acid extracted (rom sludge (Bos-HA) contains the highest percentage o( aliphaHc carbon, associated with polysacchar des structures. | ||
| Keywords | ||
| Compost. humic aci ds (HA); elemental analysis; UV& visible aesorp ion. IR spectroscopy | ||
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