Characterization of freeze dried and oven dried nitrohumic acids derived from the Mukah coal, Sarawak

Stephanie, Nawang Gayet (2007) Characterization of freeze dried and oven dried nitrohumic acids derived from the Mukah coal, Sarawak. [Project Report] (Unpublished)

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Abstract

Alkaline extraction was used to extract humic acids from Mukah coal. The alkaline solution used to perform this extraction is potassium hydroxide, KOH. Humic acids were extracted via oven-drying and freeze-drying approach. The characterization of oven-dried humic acids and freeze-dried humic acids was conducted by measuring moisture content, ash content, carboxyl group (-COOH), total acidity (COOH phenolic- and/or enolic –OH) and phenolic (-OH). The spectroscopic characterization for both humic acids was done by using FTIR spectroscopy, Scanning Electron Microscopy (SEM) and UV/VIS spectrophotometer. Factorial design was also conducted to determine the factors (temperature, time and concentration) that will affect the yield of humic acids. The study showed that high concentration of alkaline solution (KOH) will give rise to high yield of humic acids. The results of statistical analysis (Paired t-test) show that there was no significant difference in the characteristics between them except for E4/E6 ratio.

Item Type: Project Report
Additional Information: Project Report (B.Sc.) - Universiti Malaysia Sarawak, 2007.
Uncontrolled Keywords: Humic acid , Humic acid--Analysis, unimas, university, universiti, Borneo, Malaysia, Sarawak, Kuching, Samarahan, ipta, education, undergraduate,research, Universiti Malaysia Sarawak
Subjects: Q Science > Q Science (General)
Divisions: Academic Faculties, Institutes and Centres > Faculty of Resource Science and Technology
Depositing User: Karen Kornalius
Date Deposited: 18 Jun 2015 03:35
Last Modified: 18 Jun 2015 03:35
URI: http://ir.unimas.my/id/eprint/7593

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