Characterization of the coal derived humic acids from Mukah, Sarawak as soil conditioner

In Malaysia, abundant coal resources were found in Sarawak and Sabah. The utilization of coal resources, to date, is emphasized on the energy productions. The non-energy utilization as soil conditioner is unexplored. Therefore, this study attempted to characterize the coal humic acids extracted from...

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Bibliographic Details
Published in:	Journal of the Brazilian Chemical Society Vol. 17; no. 3; pp. 582 - 587
Main Authors:	Fong, Sim Siong, Seng, Lau, Chong, Wong Nan, Asing, Janice, Nor, Muhammad Faizal b Md, Pauzan, Amira Satirawaty bt Mohd
Format:	Journal Article
Language:	English
Published:	Sociedade Brasileira de Química 01-06-2006
Subjects:	CHEMISTRY, MULTIDISCIPLINARY coal humic acids nitrohumic acids regenerated humic acids coal nitrohumic acids regenerated
Online Access:	Get full text
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Summary:	In Malaysia, abundant coal resources were found in Sarawak and Sabah. The utilization of coal resources, to date, is emphasized on the energy productions. The non-energy utilization as soil conditioner is unexplored. Therefore, this study attempted to characterize the coal humic acids extracted from Mukah coal and to evaluate its properties as soil conditioner. The coal humic acids from the regenerated sample were also assessed. The results revealed that different extractants and concentrations influenced the properties of humic acids. The extraction with KOH at 0.5 mol L-1 produced humic acids with low ash content and high acidic functional groups, which are substantial as soil conditioner. However, the yield was low. Regeneration of coal sample with 10% nitric acids improved the yield to an average of 83.45%. The acidic functional groups of nitrohumic acids were improved with the ash content remained at a low level.
ISSN:	0103-5053 1678-4790 1678-4790
DOI:	10.1590/S0103-50532006000300023