Bioremediation from wastewater and extracellular synthesis of copper nanoparticles by the fungus Trichoderma koningiopsis

• Published in: Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering Toxic/hazardous substances & environmental engineering, 2014-09, Vol.49 (11), p.1286-1295
• Main Authors: Salvadori, Marcia R., Ando, Rômulo A., Oller Do Nascimento, Cláudio A., Corrêa, Benedito
• Format: Article
• Language: English
• Subjects: Applied sciences; Biodegradation, Environmental; Biological and medical sciences; Biological treatment of waters; Biomass; Bioremediation; Biotechnology; Biotransformation; Chemical synthesis; Copper; Copper - metabolism; Copper nanoparticles; dead biomass; Environment and pollution; Exact sciences and technology; extracellular synthesis; FABRICATION; Fundamental and applied biological sciences. Psychology; Fungi; General purification processes; Industrial applications and implications. Economical aspects; Kinetics; Metal Nanoparticles - chemistry; Metal Nanoparticles - microbiology; Microscopy, Electron, Scanning; Microscopy, Electron, Transmission; Nanoparticles; PARTICLES; POLLUTION; Scanning electron microscopy; Synthesis; Trichoderma; Trichoderma - growth & development; Trichoderma - metabolism; Trichoderma - ultrastructure; Trichoderma koningiopsis; Waste Water - chemistry; Waste Water - microbiology; Wastewaters; Water treatment and pollution
• ISSN: 1093-4529; 1532-4117
• DOI: 10.1080/10934529.2014.910067

This is the first study describing the rapid extracellular production of copper nanoparticles by dead biomass of Trichoderma koningiopsis. The production and uptake of copper nanoparticles by dead biomass of Trichoderma koningiopsis were characterized by investigating physicochemical factors, equilibrium concentrations and biosorption kinetics, combined with scanning electron microscopy (SEM), energy dispersive X-ray (EDS), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). A successful route for the metallic copper nanoparticles synthesis was achieved, and followed a Langmuir isotherm where a high biosorption capacity was observed, 21.1 mg g −1 . The kinetic analysis showed that copper biosorption followed a pseudo-second-order model. The nanoparticles mainly exhibited a spherical shape, with an average size of 87.5 nm, and were synthesized extracellularly. The presence of proteins as stabilizing agents of the nanoparticles was demonstrated. The extracellular biosynthesis and uptake of copper nanoparticles using dead fungal biomass is a low-cost green processes, and bioremediation of impacted local.