title: Bioremediation from wastewater and extracellular synthesis of copper nanoparticles by the fungus Trichoderma koningiopsis.
abstract: 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.
authors: a Department of Microbiology, Biomedical Institute II , University of São Paulo , São Paulo , Brazil.
authors: Marcia R
authors: MR
authors: Salvadori
authors: Rômulo A
authors: RA
authors: Ando
authors: Cláudio A
authors: CA
authors: Oller Do Nascimento
authors: Benedito
authors: B
authors: Corrêa
mesh_terms: D001673:Biodegradation, Environmental; D018533:Biomass; D001711:Biotransformation; D003300:Copper / Q000378:metabolism*; D007700:Kinetics; D053768:Metal Nanoparticles / Q000737:chemistry / Q000382:microbiology*; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D014242:Trichoderma / Q000254:growth & development / Q000378:metabolism* / Q000648:ultrastructure; D062065:Wastewater / Q000737:chemistry / Q000382:microbiology*
chemical_list: D003300:Copper; D062065:Wastewater
keywords: Copper nanoparticles; Trichoderma koningiopsis; dead biomass; extracellular synthesis