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Title: Selenium adsorption to aluminum-based water treatment residuals

Abstract

Aluminum-based water treatment residuals (WTR) can adsorb water- and soil-borne P, As(V), As(III), and perchlorate, and may be able to adsorb excess environmental selenium. WTR, clay minerals, and amorphous aluminum hydroxide were shaken for 24 h in selenate or selenite solutions at pH values of 5-9, and then analyzed for selenium content. Selenate and selenite adsorption edges were unaffected across the pH range studied. Selenate adsorbed on to WTR, reference mineral phases, and amorphous aluminum hydroxide occurred as outer sphere complexes (relatively loosely bound), while selenite adsorption was identified as inner-sphere complexation (relatively tightly bound). Selenite sorption to WTR in an anoxic environment reduced Se(IV) to Se(0), and oxidation of Se(0) or Se(IV) appeared irreversible once sorbed to WTR. Al-based WTR could play a favorable role in sequestering excess Se in affected water sources.

Authors:
; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1005806
Resource Type:
Journal Article
Journal Name:
J. Colloid Interf. Sci.
Additional Journal Information:
Journal Volume: 338; Journal Issue: (1) ; 10, 2009; Journal ID: ISSN 0021-9797
Country of Publication:
United States
Language:
ENGLISH
Subject:
54 ENVIRONMENTAL SCIENCES; ADSORPTION; ALUMINIUM COMPOUNDS; SORPTIVE PROPERTIES; CLAYS; ALUMINIUM HYDROXIDES; SELENATES; SELENITES; SELENIUM; WATER TREATMENT

Citation Formats

Ippolito, James A, Scheckel, Kirk G, Barbarick, Ken A, US-Agriculture), EPA), and CSU). Selenium adsorption to aluminum-based water treatment residuals. United States: N. p., 2009. Web. doi:10.1016/j.jcis.2009.06.023.
Ippolito, James A, Scheckel, Kirk G, Barbarick, Ken A, US-Agriculture), EPA), & CSU). Selenium adsorption to aluminum-based water treatment residuals. United States. https://doi.org/10.1016/j.jcis.2009.06.023
Ippolito, James A, Scheckel, Kirk G, Barbarick, Ken A, US-Agriculture), EPA), and CSU). 2009. "Selenium adsorption to aluminum-based water treatment residuals". United States. https://doi.org/10.1016/j.jcis.2009.06.023.
@article{osti_1005806,
title = {Selenium adsorption to aluminum-based water treatment residuals},
author = {Ippolito, James A and Scheckel, Kirk G and Barbarick, Ken A and US-Agriculture) and EPA) and CSU)},
abstractNote = {Aluminum-based water treatment residuals (WTR) can adsorb water- and soil-borne P, As(V), As(III), and perchlorate, and may be able to adsorb excess environmental selenium. WTR, clay minerals, and amorphous aluminum hydroxide were shaken for 24 h in selenate or selenite solutions at pH values of 5-9, and then analyzed for selenium content. Selenate and selenite adsorption edges were unaffected across the pH range studied. Selenate adsorbed on to WTR, reference mineral phases, and amorphous aluminum hydroxide occurred as outer sphere complexes (relatively loosely bound), while selenite adsorption was identified as inner-sphere complexation (relatively tightly bound). Selenite sorption to WTR in an anoxic environment reduced Se(IV) to Se(0), and oxidation of Se(0) or Se(IV) appeared irreversible once sorbed to WTR. Al-based WTR could play a favorable role in sequestering excess Se in affected water sources.},
doi = {10.1016/j.jcis.2009.06.023},
url = {https://www.osti.gov/biblio/1005806}, journal = {J. Colloid Interf. Sci.},
issn = {0021-9797},
number = (1) ; 10, 2009,
volume = 338,
place = {United States},
year = {Wed Sep 02 00:00:00 EDT 2009},
month = {Wed Sep 02 00:00:00 EDT 2009}
}