Bienvenido al Repositorio Institucional del Concytec

El Repositorio Institucional del Concytec tiene como objetivo permitir el libre acceso a la producción científica institucional, optimizando su visibilidad; así mismo garantizar la preservación y conservación de la información relacionada a la ciencia, tecnología e innovación.



Display.item.jsp


Por favor, utiliza este identificador para citar o enlazar este ítem:
http://hdl.handle.net/20.500.12390/2402


Título: Xanthation of alginate for heavy metal ions removal. Characterization of xanthate-modified alginates and its metal derivatives
Autor(es): Córdova B.M. 
Venâncio T. 
Olivera M. 
Huamani-Palomino R.G. 
Valderrama A.C. 
Resumen: Xanthates are widely used in mining industry as collectors for its high affinity towards metal sulfides and precious metal ores. The possibility of using alginate for xanthation has not been explored yet despite the feasibility by the presence of hydroxyl groups alongside the polymeric chains. Therefore, this work aims to evaluate the alginate as a matrix for xanthation and its application on heavy metal ions removal. In order to obtain green materials, important pararmeter were explored such as the effect of reaction time (4–12 h), type of base (NaOH/KOH) and amount of carbon disulfide (2–10%v/v). Xanthated alginates were analyzed by NMR techniques and evidence of β-elimination was detected at 5.45 ppm. Furthermore, the presence of S element was confirmed by EDS mapping technique, while XRD showed a semi-crystalline structure. On the other hand, the chemical shifts of δ(C=S) and ν(C=S) bands were found around 863–805 cm−1 and 662–602 cm−1 respectively. Also, a shoulder at 182 ppm is appreciated by NMR in solid state attributed to C[dbnd]S group. According to FESEM analyses, morphology of xanthated alginates is affected by interaction with heavy metal ions. Finally, suitable materials for the removal of heavy metal ions were established at optimum pH values. © 2020
Tema: Alginate;Carbon disulfide;Chemical modification;Heavy metals;Xanthation
Editorial: Elsevier B.V.
Fecha de publicación: 2021
Publicado en: International Journal of Biological Macromolecules 
Financiamiento: CONV-000208-2015-FONDECYT-DE 
Tipo de publicación: info:eu-repo/semantics/article
Identificador Handle: http://hdl.handle.net/20.500.12390/2402
DOI: 10.1016/j.ijbiomac.2020.12.022
Nivel de acceso: info:eu-repo/semantics/closedAccess
Colección:2.2 Estudios de maestría

Registro Dublin Core completo



Páginas vistas

4
marcado en 06-dic-2021

Google ScholarTM

Check

Altmetric

  • Compartir este item
  • QR Code

Los ítems de DSpace están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.