Title
Heavy metal removal from aqueous systems using hydroxyapatite nanocrystals derived from clam shells
Date Issued
01 January 2019
Access level
open access
Resource Type
journal article
Author(s)
Núñez D.
Serrano J.A.
Mancisidor A.
Elgueta E.
Oyarzún P.
Cáceres R.
Ide W.
Rivas B.L.
Centro de Investigación de Polímeros Avanzados
Publisher(s)
Royal Society of Chemistry
Abstract
Hydroxyapatite (HA) was synthesized by wet chemical precipitation, using clam shell (CS) waste as feedstock. SEM and TEM observation of the produced hydroxyapatite revealed the presence of rod-shaped nanocrystals, while XRD and EDS analyses confirmed the characteristic patterns of hydroxyapatite molecules. This material was subsequently employed as a sorbent for heavy metal removal from aqueous solutions, both in batch and column equilibrium procedures. In batch studies, higher sorption efficiencies were obtained at pH 5, with the highest adsorption capacities of 265, 64, and 55 mg g-1 for Pb(ii), Cd(ii), and Cu(ii), respectively. In addition, an adsorption capacity of 42.5 mg g-1 was determined using a CS-HA packed bed column fed with a solution of Pb(ii). Finally, the breakthrough curve was fitted with Thomas model in order to predict column behavior and scaling up.
Start page
22883
End page
22890
Volume
9
Issue
40
Language
English
OCDE Knowledge area
Nano-materiales
Scopus EID
2-s2.0-85070207513
Source
RSC Advances
ISSN of the container
2046-2069
Sponsor(s)
The present research was funded by the National Commission of Scientific Research and Technology (CONICYT, Chile): PAI Grant No 7815020005, FONDECYT Grant No 1150510 and CONICYT Regional Grant No R16F10013. The authors also acknowledge the scholarship given to Aritz Mancisidor and Jon Ander Serrano by the Global Training Internationalization Program from the Basque Government (Spain); and CIPA, CONICYT Regional, GORE BIO BIO, R17A10003.
Sources of information:
Directorio de Producción Científica
Scopus