Please use this identifier to cite or link to this item:
Title: X-ray absorption spectroscopy as a tool investigating arsenic(III) and arsenic(V) sorption by an aluminum-based drinking-water treatment residual
Authors: Makris, Konstantinos C. 
Sarkar, Dibyendu 
Parsons, Jason G. 
Datta, Rupali K. 
Gardea-Torresdey, Jorge Luis 
Major Field of Science: Natural Sciences
Field Category: Earth and Related Environmental Sciences
Keywords: Residuals;Drinking-water;Arsenic (As);XANES;EXAFS
Issue Date: 15-Nov-2009
Source: Journal of Hazardous Materials, 2009, vol. 171, no. 1-3, pp. 980-986
Volume: 171
Issue: 1-3
Start page: 980
End page: 986
Journal: Journal of Hazardous Materials 
Abstract: Historic applications of arsenical pesticides to agricultural land have resulted in accumulation of residual arsenic (As) in such soils. In situ immobilization represents a cost-effective and least ecological disrupting treatment technology for soil As. Earlier work in our laboratory showed that drinking-water treatment residuals (WTRs), a low-cost, waste by-product of the drinking-water treatment process exhibit a high affinity for As. Wet chemical experiments (sorption kinetics and desorption) were coupled with X-ray absorption spectroscopy measurements to elucidate the bonding strength and type of As(V) and As(III) sorption by an aluminum-based WTR. A fast (1 h), followed by a slower sorption stage resulted in As(V) and As(III) sorption capacities of 96% and 77%, respectively. Arsenic desorption with a 5 mM oxalate from the WTR was minimal, being always <4%. X-ray absorption spectroscopy data showed inner-sphere complexation between As and surface hydroxyls. Reaction time (up to 48 h) had no effect on the initial As oxidation state for sorbed As(V) and As(III). A combination of inner-sphere bonding types occurred between As and Al on the WTR surface because mixed surface geometries and interatomic distances were observed.
ISSN: 0304-3894
DOI: 10.1016/j.jhazmat.2009.06.102
Rights: © Elsevier
Type: Article
Affiliation : Cyprus International Institute for Environmental & Public Health 
Montclair State University 
University of Texas 
Michigan Technological University 
Appears in Collections:Άρθρα/Articles

CORE Recommender
Show full item record


checked on Jun 7, 2021

Citations 50

Last Week
Last month
checked on Apr 22, 2021

Page view(s) 20

Last Week
Last month
checked on Jun 13, 2021

Google ScholarTM



Items in KTISIS are protected by copyright, with all rights reserved, unless otherwise indicated.