Please use this identifier to cite or link to this item: https://ktisis.cut.ac.cy/handle/10488/4232
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.
URI: http://ktisis.cut.ac.cy/handle/10488/4232
ISSN: 0304-3894
DOI: 10.1016/j.jhazmat.2009.06.102
Collaboration : Cyprus International Institute for Environmental & Public Health
Montclair State University
University of Texas
Michigan Technological University
Rights: © Elsevier
Type: Article
Appears in Collections:Άρθρα/Articles

CORE Recommender
Show full item record

SCOPUSTM   
Citations 50

29
checked on Jun 22, 2020

WEB OF SCIENCETM
Citations 50

25
Last Week
0
Last month
0
checked on Jun 20, 2020

Page view(s) 50

158
Last Week
2
Last month
6
checked on Jun 26, 2020

Google ScholarTM

Check

Altmetric


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