Abstract :

The Contamination Of Water Bodies With Heavy Metal And Nutrient Loads From Industrial Effluent Is A Growing Environmental And Public-health Concern And Conventional Remediation Methods Are Often Costly, Energy Intensive Or Reliant On Hazardous Chemicals. Biologically Synthesized Silver Nanoparticles (AgNPs) Possess Large Surface Area-to-volume Ratio And Strong Affinity For Metal Ions, Making Them Low Cost And Eco-friendly. In This Study, AgNPs Were Biosynthesized By Employing A Culturederived Extract Of Saline Cyanobacterium, Synechocystis Salina, Which Was Isolated And Molecularly Identified Prior To Nanoparticle Synthesis. The Reduction Of Ag⁺ Ions Were Confirmed By The Visual Change In The Color From A Pale Yellow-green To A Dark Brown, Which Is Consistent With The Surface Plasmon Resonance. The Nanoparticles Were Characterized By Fourier-transform Infrared Spectroscopy (FTIR) Which Identified Surface Bound Amine, Amide, Carboxyl, Alkane, Ketone And Alkyl-amine Functional Groups Responsible For Capping And Stabilization, And Scanning Electron Microscopy (SEM) Which Revealed An Irregular, Aggregated Nanostructured Surface Morphology. Then The AgNP-enriched Microalgal Suspension Was Applied To Real Industrial Wastewater Collected From A Local Effluent Discharge Site. During The Four Days Of Treatment, Nitrate Concentration Decreased From 1.102 To 0.89 Mg/L (19.3% Reduction), Phosphorus From 1.939 To 0.756 Mg/L (61.0% Reduction) And Ammonia From 1.143 To 0.130 Mg/L (88.6% Reduction), Cadmium Concentration Decreased From 3.5 To 3.1 Mg/kg, Measured By ICP-OES/ICP-MS. The Results Suggest The Potential Of S. Salina-derived AgNPs To Reduce The Nutrient And Heavy-metal Loads In Real Industrial Effluent And Support The Further Development Of Microalgal Nanoparticle Systems As A Sustainable Wastewater-treatment Strategy.

Published:

25-1-2026

Issue:

Vol. 26 No. 1 (2026)

Page Nos:

285-292

Section:

Articles

License:

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

How to Cite