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ISSN 2063-5346
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PHYSICOCHEMICAL PROPERTIES OF NYPA SALT EXTRACTED FROM DEHYDRATION AND CALCINATION METHOD

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Mohd Syafiq Abdullah, Mohamad Saiful Sulaiman, Abdul Fattah Ab Razak, Mohd Zahid Abidin, Mohammad Hafsanjani Salleh, Ashraf A. Razak
» doi: 10.31838/ecb/2023.12.s3.181

Abstract

The article explores the extraction of Nypa salt from Nypa frond using two methods, ashing and dehydration method. The dehydration method yielded 15% of salt by heating the fronds at 60°C under a pressure of 60 mbar, while the calcination method yielded 30% of salt by heating the fronds at 60°C and calcinating them overnight at 900°C. The mineral content of the salt extracted through the dehydration and calcination methods showed differences, with the dehydration method having Na (17.7%), Mg (4.4%), Al (4.7%), P (2.8%), Si (7.1%), Cl (44.1%), K (18.6%), and Ca (1.9%), and the calcination method having Na (17.5%), Mg (4.4%), Al (4.8%), P (2.6%), Si (7.0%), Cl (48.9%), K (18.9%), and Ca (2.2%). The colour of the salt produced by both methods was visually distinct, with the dehydration method producing salt with an L* value of 31.934, a* value of 11.327, and a b* value of 23.574, and the calcination method producing salt with an L* value of 52.567, a* value of 7.826, and a b* value of 13.009. The NaCl level obtained from the dehydration method was lower (42.5%) than that of ashing method (44.2%), but the solubility of the salt extracted through the calcination method was higher than that of the salt extracted through the dehydration method. The mass of input material used for extraction was a crucial variable in determining the yield of the product or process.

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