Microalgae-mediated green synthesis of silver nanoparticles: a sustainable approach using extracellular polymeric substances from <i>Graesiella emersonii</i> KNUA204.

ABSTRACT: Traditional nanoparticle synthesis relies on chemical and physical methods that often involve hazardous reagents, high energy consumption, and environmental toxicity. As a sustainable alternative, biological synthesis utilizes biomolecules in an eco-friendly manner to form nanoparticles. This study explores the green synthesis of silver nanoparticles (AgNPs) using extracellular polymeric substances (EPS) secreted by the microalga Graesiella emersonii KNUA204, highlighting the potential of microalgal biomolecules in nanotechnology. EPS-rich supernatant from G. emersonii enabled AgNP formation under light without the need for biomass pre-processing. The effects of culture age, pH (optimal at 10-11), and tetracycline as a secondary stabilizer were examined. Tetracycline accelera

SUBMITTER: Do JM 

PROVIDER: S-EPMC12116571 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature