Valorization of keratin biofibers for removing heavy metals from aqueous solutions
Zhang, Helan (Universitat Autònoma de Barcelona. Departament de Química)
Carrillo Navarrete, Fernando (Universitat Politècnica de Catalunya. Departament d'Enginyeria Química)
López-Mesas, Montserrat (Universitat Autònoma de Barcelona. Departament de Química)
Palet i Ballús, Cristina (Universitat Autònoma de Barcelona. Departament de Química)

Date:	2019
Description:	13 pàg.
Abstract:	Four common waste keratin biofibers (human hair, dog hair, chicken feathers, and degreased wool) have been used as biosorbents for the removal of heavy metal ions from aqueous solutions. Different parameters of the biosorption processes were optimized in batch systems. For multiple-metal systems, consisting of a mixture of eight metal ions [Cr(III), Mn(II), Co(II), Ni(II), Cu(II), Zn(II), Cd(II), and Pb(II)], the total metal biosorption increased in the order: degreased wool > chicken feathers > human hair > dog hair. From the kinetic models tested, the pseudo-second-order model provided better results. Furthermore, biosorption isotherms of Pb(II) with the different keratin biofibers fitted the Langmuir model. Surface morphology of the biosorbents were analyzed before and after the sorption using Fourier transform infrared spectroscopy and scanning electron microscopy. The keratin biofibers tested are potentially good sorbents of metal ions, with degreased wool and chicken feathers being the more efficient ones.
Grants:	Ministerio de Economía y Competitividad CTM2015-65414-C2-1-R Ministerio de Economía y Competitividad MAT2015-65392-C2-1-R
Note:	The authors are grateful to the UAB Microscopy Service (Servei de Microscopia Electrònica) for the SEM analysis and the Service of Analytical Chemistry (Servei d'Anàlisi Química - SAQ) for the FTIR analysis.
Rights:	Aquest material està protegit per drets d'autor i/o drets afins. Podeu utilitzar aquest material en funció del que permet la legislació de drets d'autor i drets afins d'aplicació al vostre cas. Per a d'altres usos heu d'obtenir permís del(s) titular(s) de drets.
Language:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Subject:	Environmental sustainability ; Heavy metal ; Keratin ; Kinetic study ; Sorption ; Waste reduction ; Hair ; Metal ion ; Aqueous solution
Published in:	Textile Research Journal, Vol. 89, issue 7 (April 2019) , p. 1153-1165, ISSN 1746-7748

DOI: 10.1177/0040517518764008

Postprint 36 p, 1.7 MB

The record appears in these collections:
Articles > Research articles
Articles > Published articles