期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 338, 期 1, 页码 48-55出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2009.06.023
关键词
Inner-sphere complexation; Outer-sphere complexation; Selenate; Selenite; X-ray absorption spectroscopy
资金
- US Department of Energy - Basic Energy Sciences [DE-AC02-06CH11357]
- NSERC
- University of Washington
- Simon Fraser University
- Advanced Photon Source
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. AI-based WTR could play a favorable role in sequestering excess Se in affected water sources. Published by Elsevier Inc.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据