EXTRACELLULAR BIOSYNTHESIS OF SILVER NANOPARTICLES BY TRICHODERMA REESEI AND THEIR APPLICATION TO REMOVE XANTHOGENATE FROM WASTEWATER
O. Ts. Gemishev, M. I. Panayotova, V. T. Panayotov, E. S. Zaharieva
Pagini: 230-240
Publicat: 18 Sep 2019
Vizualizări: 1,787
Descărcări: 199
Citations: 1 (Google Scholar)
Rezumat: Application of fungi in the biosynthesis of silver nanoparticles is a green and feasible alternative to chemical and physical methods used for AgNPs synthesis. The fungus Trichoderma reesei is a non-pathogenic and environmentally friendly microorganism capable to produce extracellular enzymes and metabolites in high scale. An extracellular biosynthesis of silver nanoparticles (AgNPs) from AgNO3 solution by using the cell-free extract of Trichoderma reesei biomass is presented in this study. Kinetics of the biotransformation is described by a second order reaction equation. Spherical or approximately spherical AgNPs that are well-dispersed and with a size between 3-4 and 15-17 nm have been produced at transformation degree of 30 % with respect to the initial silver ions concentration. The biosynthesized AgNPs show high stability against agglomeration even after storage for 60 days. Soluble xanthates, used in some industrial applications, are found toxic to aquatic biota even at low concentrations. The synthesized AgNPs are capable to immobilize potassium amyl xanthate from model wastewater. The pollutant adsorption is described by the Langmuir adsorption isotherm and the calculated maximum adsorption capacity is 4.67 mg/mg. The pollutant immobilization by AgNPs is much faster process and requires much less adsorbent (50 fold) in comparison with the activated carbon (chemical grade of purity).
Cuvinte cheie: silver nanoparticles, biosynthesis, trichoderma reesei, potassium amyl xanthate removal
Citează acest articol: O. Ts. Gemishev, M. I. Panayotova, V. T. Panayotov, E. S. Zaharieva. EXTRACELLULAR BIOSYNTHESIS OF SILVER NANOPARTICLES BY TRICHODERMA REESEI AND THEIR APPLICATION TO REMOVE XANTHOGENATE FROM WASTEWATER. Journal of International Scientific Publications: Materials, Methods & Technologies 13, 230-240 (2019). https://www.scientific-publications.net/en/article/1001897/
Înapoi la cuprinsul volumului
© 2026 The Author(s). This is an open access article distributed under the terms of the
Creative Commons Attribution License https://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. This permission does not cover any third party copyrighted material which may appear in the work requested.
Disclaimer: The Publisher and/or the editor(s) are not responsible for the statements, opinions, and data contained in any published works. These are solely the views of the individual author(s) and contributor(s). The Publisher and/or the editor(s) disclaim any liability for injury to individuals or property arising from the ideas, methods, instructions, or products mentioned in the content.
