Citation
Abstract
The moisture sorption isotherms of Clinacanthus nutans (C. nutans) herbal leaves were established at three different temperatures of 30°C, 40°C, and 50°C, and water activity between 0.3–0.9 using a static gravimetric method. The results showed that equilibrium moisture content of C. nutans increased with increasing water activity at a constant temperature for both desorption and adsorption isotherms. In contrast, the equilibrium moisture content decreased when the temperature increased at a constant water activity for all isotherms. The sorption isotherms exhibited Type III behaviour or J-shaped curve according to Brunauer-Emmett-Teller (BET) classification. It was found that Guggenheim-Anderson-de Boer (GAB) and Peleg models were the best-fit to the experimental moisture isotherms. The maximum net isosteric heat of sorption values were found to be 70 kJ/mol and 13 kJ/mol for desorption and adsorption respectively. The moisture sorption isotherms established are essential for optimum design of C. nutans dryer and storage conditions.
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Additional Metadata
| Item Type: | Article |
|---|---|
| Divisions: | Faculty of Engineering Halal Products Research Institute |
| DOI Number: | https://doi.org/10.18178/joaat.10.1.8-15 |
| Publisher: | EJournal Publishing |
| Keywords: | C. nutans; Herb; Sorption isotherm; Monolayer moisture content; Net isosteric sorption heat; Responsible consumption and production |
| Depositing User: | Ms. Che Wa Zakaria |
| Date Deposited: | 08 Aug 2024 07:03 |
| Last Modified: | 08 Aug 2024 07:03 |
| Altmetrics: | http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.18178/joaat.10.1.8-15 |
| URI: | http://psasir.upm.edu.my/id/eprint/108568 |
| Statistic Details: | View Download Statistic |
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