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All Journal Kwaghe International Journal of Sciences and Technology Open Access DRIVERset
Yakubu, James
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Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Environmental Science Law, Crime, Criminology & Criminal Justice Social Sciences

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Extraction and Characterization of Natural Dye Obtained from African Locust Bean (Parkia biglobosa) Pod Bark Kanadi, Andema Aaron; Yakubu, Joshua; Shalbugau, Kefas Wathagrda; Atiku, Jamila Umar; Yakubu, James; Dass, Peter Micheal
Kwaghe International Journal of Sciences and Technology Vol 3 No 1 (2026): Kwaghe International Journal of Sciences and Technology
Publisher : Darul Yasin Al Sys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/kijst.v3i1.9400

Abstract

Although natural dyes have attracted growing interest as sustainable alternatives to synthetic colorants, studies on the physicochemical, phytochemical, antimicrobial, and structural properties of dye extracts from African locust bean pod remain limited. This study investigated the extraction and characterization of a natural dye from African locust bean pod using the maceration method. The extraction yielded 23.76%, and the dye extract was dark brown, with a pH of 5.77, a melting point of 440 °C, a density of 0.54 g/mL, partial solubility in water, and complete solubility in methanol. Phytochemical screening revealed the presence of tannins, flavonoids, alkaloids, glycosides, phlabotannins, anthraquinones, quinones, terpenoids, steroids, carbohydrate, starch, proteins, and anthocyanins, while saponin was absent. The extract demonstrated antibacterial activity against B. subtilis, E. coli, S. aureus, P. aeruginosa, and S. typhi, and antifungal activity against P. notatum, but no antifungal activity was observed against C. albicans and A. niger at all concentrations. Characterization was conducted using UV-Vis, FTIR, GC-MS, HPLC, and SEM analyses. The UV-Vis spectrum showed distinct absorption peaks, with the highest absorbance recorded at 287 nm (4.1000), likely associated with carbonyl (C=O) groups characteristic of hydrolysable tannins. FTIR analysis indicated the presence of C–H stretching, C=C stretching, C=O stretching, and C–O stretching functional groups. GC-MS identified 19 compounds with varying retention times and peak areas, among which cis-9-hexadecenal (14.81%) was the major compound, followed by heneicosanoic acid (8.59%), hexadecanoic acid (7.93%), and octadecanoic acid (7.31%). HPLC analysis revealed gallic acid as the most abundant compound, indicating the presence of hydrolysable tannin, while SEM showed a rough and porous surface morphology with a compacted, fused-like solid structure. These findings demonstrate that African locust bean pod is a promising source of natural dye with notable bioactive and structural characteristics, thereby contributing to the growing body of knowledge on plant-based dye materials.
Optimization of the Dyeing Conditions of Natural Dye from African Locust Bean (Parkia biglobosa) Pod on Cotton Fabrics Kanadi, Andama Aaron; Yakubu, Joshua; Yakubu, James; Bilyamin, Abdulkadir Junior; Ayo, Akinterinwa; Dass, Peter Micheal
Kwaghe International Journal of Sciences and Technology Vol 3 No 2 (2026): Kwaghe International Journal of Sciences and Technology
Publisher : Darul Yasin Al Sys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/kijst.v3i2.10011

Abstract

This study examines the dyeing performance, color fastness, surface morphology, and antimicrobial properties of cotton fabrics dyed with natural dye extract, both with and without mordant treatment. The dye extract was applied to treated and untreated cotton fabrics, while CuSO₄, FeSO₄, and KAl(SO₄)₂ were used as mordants to produce different color shades. The optimum dyeing conditions for treated and untreated cotton fabrics were identified at dye concentrations of 2% and 1.5%, temperatures of 90°C and 80°C, and dyeing times of 60 and 50 minutes, respectively. Color fastness to washing and sunlight was evaluated, and the surface morphology of dyed and undyed fabrics was investigated using SEM. The dyed cotton fabrics demonstrated good color fastness, with ratings ranging from 3 to 5 under washing and sunlight exposure. Antimicrobial analysis showed that all dyed fabrics, with and without mordants, produced no inhibition zone against the bacteria Bacillus subtilis and Salmonella typhi, with values of 0.00 ± 0.00. However, the dyed fabrics exhibited varying inhibition zones against the fungus Penicillium notatum. Treated cotton dyed with copper sulphate mordant showed the highest inhibition zone of 1.1 ± 0.00 mm, whereas untreated cotton dyed with potassium aluminium sulphate mordant showed the lowest inhibition zone of 0.4 ± 0.00 mm. The study concludes that mordant-assisted dyeing can improve shade variation and maintain acceptable color fastness in cotton fabrics, while the antifungal activity of the dyed fabrics suggests potential functional value for naturally dyed textile applications.
Extraction and Characterization of Natural Dye Obtained from African Locust Bean (Parkia biglobosa) Pod Bark Kanadi, Andema Aaron; Yakubu, Joshua; Shalbugau, Kefas Wathagrda; Atiku, Jamila Umar; Yakubu, James; Dass, Peter Micheal
Kwaghe International Journal of Sciences and Technology Vol 3 No 1 (2026): Kwaghe International Journal of Sciences and Technology
Publisher : Darul Yasin Al Sys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/kijst.v3i1.9400

Abstract

Although natural dyes have attracted growing interest as sustainable alternatives to synthetic colorants, studies on the physicochemical, phytochemical, antimicrobial, and structural properties of dye extracts from African locust bean pod remain limited. This study investigated the extraction and characterization of a natural dye from African locust bean pod using the maceration method. The extraction yielded 23.76%, and the dye extract was dark brown, with a pH of 5.77, a melting point of 440 °C, a density of 0.54 g/mL, partial solubility in water, and complete solubility in methanol. Phytochemical screening revealed the presence of tannins, flavonoids, alkaloids, glycosides, phlabotannins, anthraquinones, quinones, terpenoids, steroids, carbohydrate, starch, proteins, and anthocyanins, while saponin was absent. The extract demonstrated antibacterial activity against B. subtilis, E. coli, S. aureus, P. aeruginosa, and S. typhi, and antifungal activity against P. notatum, but no antifungal activity was observed against C. albicans and A. niger at all concentrations. Characterization was conducted using UV-Vis, FTIR, GC-MS, HPLC, and SEM analyses. The UV-Vis spectrum showed distinct absorption peaks, with the highest absorbance recorded at 287 nm (4.1000), likely associated with carbonyl (C=O) groups characteristic of hydrolysable tannins. FTIR analysis indicated the presence of C–H stretching, C=C stretching, C=O stretching, and C–O stretching functional groups. GC-MS identified 19 compounds with varying retention times and peak areas, among which cis-9-hexadecenal (14.81%) was the major compound, followed by heneicosanoic acid (8.59%), hexadecanoic acid (7.93%), and octadecanoic acid (7.31%). HPLC analysis revealed gallic acid as the most abundant compound, indicating the presence of hydrolysable tannin, while SEM showed a rough and porous surface morphology with a compacted, fused-like solid structure. These findings demonstrate that African locust bean pod is a promising source of natural dye with notable bioactive and structural characteristics, thereby contributing to the growing body of knowledge on plant-based dye materials.
Co-Authors Atiku, Jamila Umar Ayo, Akinterinwa Bilyamin, Abdulkadir Junior Dass, Peter Micheal Kanadi, Andama Aaron Kanadi, Andema Aaron Shalbugau, Kefas Wathagrda Yakubu, Joshua