Removal of Mo(VI), Pb(II), and Cu(II) from wastewater using electrospun cellulose acetate/chitosan biopolymer fibers
Autor
Lopez, Esmeralda
Gómez, Mauricio
Becar, Ian
Zapata, Paula
Pizarro, Jaime
Navlani-García, Miriam
Cazorla-Amorós, Diego
Presser, Volker
Gómez, Tatiana
Cárdenas, Carlos
Resumen
Environmentally friendly polymers such as cellulose acetate (CA) and chitosan (CS) were used to obtain electrospun fibers for Cu2+, Pb2+, and Mo6+ capture. The solvents dichloromethane (DCM) and dimethylformamide (DMF) allowed the development of a surface area of 148 m2 g−1 for CA fibers and 113 m2 g−1 for cellulose acetate/chitosan (CA/CS) fibers. The fibers were characterized by IR-DRIFT, SEM, TEM, CO2 sorption isotherms at 273 K, Hg porosimetry, TGA, stress-strain tests, and XPS. The CA/CS fibers had a higher adsorption capacity than CA fibers without affecting their physicochemical properties. The capture capacity reached 102 mg g−1 for Cu2+, 49.3 mg g−1 for Pb2+, and 13.1 mg g−1 for Mo6+. Furthermore, optimal pH, adsorption times qt, and C0 were studied for the evaluation of kinetic models and adsorption isotherms. Finally, a proposal for adsorbate-adsorbent interactions is presented as a possible capture mechanism where, in the case of Mo6+, a computational study is presented. The results demonstrate the potential to evaluate the fibers in tailings wastewater from copper mining. © 2024 Elsevier B.V.
Colecciones
Ítems relacionados
Mostrando ítems relacionados por Título, autor o materia.
-
Article
Mechanical and antimicrobial polyethylene composites with CaO nanoparticles (2020)
Silva, Cristián; Bobillier, Felipe; Canales, Daniel A.; Sepúlveda, Francesca; Cament, Alejandro; Amigó, Nicolás; Rivas, Lina María; Ulloa, María Teresa; Reyes-Contreras, Pablo; Ortiz, J. Andrés; ... (MDPI AG, 2020-09-18)Low-density polyethylene composites containing different sizes of calcium oxide (CaO) nanoparticles were obtained by melt mixing. The CaO nanoparticles were synthesized by either the sol-gel or sonication methods, obtaining ... -
Book
Responsabilidad social de las organizaciones (RSO) (2020)
Gorrochategui, Nora; Martins de Oliveira, Valmir; Stevenson Palamara, Nelson; Ovelar Fernández, Walter Daniel; Peretti, María Florencia; Buraschi, Mónica; Amato, Celina N.; Méndez Pinzón, Manuel; Gómez Osorio, Marcela; Frezzatti Santiago, Ana Lúcia; ... (Universidad Autónoma de Chile, 2019-08) -
Article
Coaxial fibers of poly(styrene-co-maleic anhydride)@poly(vinyl alcohol) for wound dressing applications: Dual and sustained delivery of bioactive agents promoting fibroblast proliferation with reduced cell adherence (2021)
Tamayo, Laura; Santana, Paula Andrea; Forero, Juan Carlos; Leal, Matías S.; González, Nicolás; Díaz, Mauricio; Guiliani, Nicolás; Hamm, Eugenio; Urzúa, Marcela D. (Elsevier B.V., 2021)The prevalence of chronic and acute wounds, as well as the complexity of their treatment represent a great challenge for health systems around the world. In this context, the development of bioactive wound dressings that ...