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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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Original Research Articles Volume : 15, Issue : 5, May, 2026

PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
Publisher : Excellent Publishers
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Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2018: 95.39
NAAS RATING 2020: 5.38

Int.J.Curr.Microbiol.App.Sci.2026.15(5) : 145-150
DOI : https://doi.org/10.20546/ijcmas.2026.1505.020


Bioprospecting Indigenous Microalgae for Pigment Production and Stability Assessment for Textile Applications

Department of Microbiology, MM College of Arts, NM Institute of Science, HRJ College of Commerce Bhavan's College Autonomous, Munshi Nagar, Andheri West, Mumbai, Maharashtra 400058, India
*Corresponding author
Abstract:

The severe environmental and health hazards posed by synthetic dyes in the textile industry such as toxic effluent discharge and water pollution necessitate the exploration of sustainable, eco-friendly alternatives. Microalgae present a highly viable source of natural pigments due to their rapid growth rates, high pigment content, and minimal land and freshwater requirements compared to terrestrial crops. This study aimed to bioprospecting and evaluate indigenous freshwater microalgae from local Mumbai habitats for natural pigment production and subsequent application as textile colorants. Three distinct microalgal samples were sourced for this study: an enriched culture provided by the Microbiology Department of Khalsa College (Tetradesmus spp.), an isolate from a domestic fish tank (Chlorella spp.), and an isolate from Bhavan's College Lake (Scenedesmus spp.). Initial enrichment trials established that BG-11 medium optimally supported the phototrophic growth of all three indigenous isolates. Furthermore, nitrogen availability emerged as a critical driver for both biomass accumulation and pigment biosynthesis. Cultivation using a 2.25 g/L sodium nitrate concentration (representing a 50% excess from the standard baseline) maximized both the overall biomass generation (yielding 0.428 g, 0.251 g, and 0.473 g for Samples 1, 2, and 3, respectively) and the total pigment concentration across all isolates. Intracellular pigment extraction was executed utilizing an ultrasonic-assisted method (80% amplitude with nine cycles of 10-second pulses and 5-second pauses). Solvent screening confirmed that 80% aqueous acetone was significantly superior to chloroform and hexane for pigment recovery. Quantitative spectrophotometric analysis utilizing the Arnon-Lichtenthaler equations determined that the extracts were chlorophyll-dominant. The Chlorella spp. isolate yielded the highest overall pigment concentrations, recording Chlorophyll a at 116.0 µg/g and Chlorophyll b at 294.6 µg/g of dry biomass. For textile application, the extracted natural pigments successfully imparted a green coloration to cellulosic cotton fabrics, facilitated by 5% alum and 5% tannic acid mordanting pre-treatments. However, rigorous stability assessments exposed critical vulnerabilities. The dyed textiles demonstrated exceptionally poor wash fastness, experiencing substantial colour loss within 15 minutes of mechanical agitation in mild detergent, alongside severe photodegradation and limited light fastness under continuous sunlight exposure. Ultimately, while this study successfully establishes the feasibility of utilizing indigenous microalgae for sustainable dye production, the inherent chemical instability of the chlorophyll-based pigments underscores the critical necessity for advanced encapsulation, chemical modification, and optimized mordanting strategies prior to commercial textile integration.


Keywords: Bioprospecting, indigenous microalgae, natural pigments, textile applications, colour fastness, ultrasonic-assisted extraction, chlorophyll.


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How to cite this article:

Aarif Riyazuddin Ansari, Lavina Pinto and Raut S. V. 2026. Bioprospecting Indigenous Microalgae for Pigment Production and Stability Assessment for Textile Applications. Int.J.Curr.Microbiol.App.Sci. 15(5): 145-150 doi: https://doi.org/10.20546/ijcmas.2026.1505.020
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