ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Utilization of solid post-fermented waste for green synthesis of gold nanoparticles: applications in removal of organic dyes from wastewater

Sunshri Basumatary and Anamika Kalita Deka

Department of Chemistry, Central Institute of Technology Kokrajhar (Deemed to be University, Under Ministry of Education, Govt. of India), Kokrajhar, BTR, India

E-mail: a.kalita@cit.ac.in

Received: 6 February 2024  Accepted: 9 April 2025

Abstract:

Abstract

Fermentation is an age-old practice of mankind. During fermentation of alcoholic beverages, solid wastes are generated. Here, in the present study, the solid post-fermented wastes (SPFW) were utilized for the synthesis of gold nanoparticles followed by green synthetic route. It is the first report for the utilization of SPFW in nanoparticle synthesis as per our knowledge. Gallic acid, syringic acid, caffeic acid, protocatechuic acids, etc., as a total seven polyphenols were identified by reverse phase HPLC in PFW and were assumed to be responsible for bio-reduction of Au³⁺ to Au⁰. The size and morphology of synthesized nanoparticles found were 20 nm and spherical, respectively. Significant catalytic activity of the prepared AuNPs were for removal textile organic dyes from wastewater.

Graphical abstract

Keywords: Biomethanol; Food Nanotechnology; Nanoparticle Synthesis; Nanoparticles; Solid Biofuels; Solid-phase Synthesis; Fermentation; Fermentation waste; Polyphenols; Degradation; Water

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-025-04063-y

Chemical Papers 79 (7) 4385–4401 (2025)