Mohd Hanif, Ahmad Husni and Sani Babu, Shanti Devi and Manas, Abdul Rahman and Balasundram, Siva Kumar (1996) Physico-chemical Attributes of Humic Acid Extracted from Tropical Pect. Pertanika Journal of Tropical Agricultural Science, 19 (2/3). pp. 189-196. ISSN 0126-6128
Basic research conducted on humic acid (HA) in tropical soils is limited. A study was conducted to characterize HA extracted from tropical peat by elemental and functional group analyses, infrared (IR) spectra and by direct examination on HA using scanning electron microscopy (SEM). From the elemental analysis it was found that C ranged from 40.26 - 53.26%, H 4.84 - 6.36%,038.39 - 51.62%, N 1.51- 2.64%, and P 0.02 - 0.06%. Studies of functional groups indicated that the carboxyl group present in HA of tropical peat was about twice as high as that of phenolic hydroxyl groups. From IR spectra, the HA had an aromatic character. Results of IR analysis also exhibited consistently similar spectra, demonstrating that regardless of place of origin, the extracted humic compound had a similar structure and was composed of the same functional groups. Electron microscopic examination of dried HA showed a sub-angular blocky shape which varied in size. All extracted HA exhibited similar form.
|Keyword:||humic acid, tropical peat, infrared spectra|
|Faculty or Institute:||Faculty of Agriculture|
|Publisher:||Universiti Putra Malaysia Press|
|Deposited By:||Nasirah Abu Samah|
|Deposited On:||30 Nov 2009 05:13|
|Last Modified:||27 May 2013 07:09|
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