Effect of different alkaline treatment on the release of ferulic acid from oil palm empty fruit bunch fibres

Fairouz Jahaan Mohd Aanifah, . and Phang Lai Yee, . and Helmi Wasoh, . and Suraini Abd-Aziz, . Effect of different alkaline treatment on the release of ferulic acid from oil palm empty fruit bunch fibres. pp. 321-331. ISSN 1511-2780

Serious thought on sustainability of palm oil industry triggers ways to minimise the impacts caused to the environment by recycling oil palm empty fruit bunch (OPEFB). An alkaline treatment strategy was developed for ferulic acid (FA) release from OPEFB fibres. The selected treatment of autoclaving OPEFB (120C 3 hr) and hydrolysing it with 20 g kg-1 NaOH (90C 3 hr) yielded 62.52 6.24 mg litre-1 FA. Based on alkali selection (5 to 50 g kg-1 of NaOH KOH and K2CO3) 20 g kg-1 KOH showed almost similar FA release to 20 g kg-1 of NaOH as it solubilised 56.94 3.52 mg litre-1 FA. The addition of sodium bisulphite (NaHSO3) resulted in an increase of 4.23 mg litre-1 FA using KOH treatment. FA decreased when subjected to prolonged reaction times at high temperature while at ambient temperature only about 30 to 35 mg litre-1 FA was released. Fourier transform infrared (FTIR) analysis showed evidence of decrease in aromatic groups lignin and ester linkage stretching. The selected treatment method using 20 g kg-1 NaOH and KOH solubilised 4.24 mg and 3.84 mg FA from 1 g of OPEFB lignin respectively. From this finding OPEFB exhibited a great potential as a feedstock for FA production. FA obtained from this treatment is very useful precursor for vanilic acid vanillin and other value-added products formation through microbial conversion.

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Abstract

Serious thought on sustainability of palm oil industry triggers ways to minimise the impacts caused to the environment by recycling oil palm empty fruit bunch (OPEFB). An alkaline treatment strategy was developed for ferulic acid (FA) release from OPEFB fibres. The selected treatment of autoclaving OPEFB (120C 3 hr) and hydrolysing it with 20 g kg-1 NaOH (90C 3 hr) yielded 62.52 6.24 mg litre-1 FA. Based on alkali selection (5 to 50 g kg-1 of NaOH KOH and K2CO3) 20 g kg-1 KOH showed almost similar FA release to 20 g kg-1 of NaOH as it solubilised 56.94 3.52 mg litre-1 FA. The addition of sodium bisulphite (NaHSO3) resulted in an increase of 4.23 mg litre-1 FA using KOH treatment. FA decreased when subjected to prolonged reaction times at high temperature while at ambient temperature only about 30 to 35 mg litre-1 FA was released. Fourier transform infrared (FTIR) analysis showed evidence of decrease in aromatic groups lignin and ester linkage stretching. The selected treatment method using 20 g kg-1 NaOH and KOH solubilised 4.24 mg and 3.84 mg FA from 1 g of OPEFB lignin respectively. From this finding OPEFB exhibited a great potential as a feedstock for FA production. FA obtained from this treatment is very useful precursor for vanilic acid vanillin and other value-added products formation through microbial conversion.

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Item Type:	Article
AGROVOC Term:	Oil palm
AGROVOC Term:	Fibres
AGROVOC Term:	Ferulic acid
AGROVOC Term:	Sustainability
AGROVOC Term:	Autoclaving
AGROVOC Term:	Hydrolysis
AGROVOC Term:	Aromatic compounds
AGROVOC Term:	Lignins
AGROVOC Term:	Esters
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 06:29
URI:	http://webagris.upm.edu.my/id/eprint/24571

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