Journal
GEOCHIMICA ET COSMOCHIMICA ACTA
Volume 73, Issue 6, Pages 1577-1587Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.gca.2008.12.018
Keywords
-
Categories
Funding
- CCLRC for the provision of facilities at the Daresbury Synchrotron Radiation Source laboratory [40067]
- University of Nottingham
Ask authors/readers for more resources
The effect of prolonged contact time (up to 130 days) on the immobilization of Cd by sorption to calcium exchanged zeolite-X (CaX), under environmentally relevant conditions, was studied using both isotopic exchange and extended X-ray absorption fine structure spectroscopy (EXAFS). Sorption and isotopic exchange measurements revealed time-dependent Cd sorption and indicated the movement of Cd2+ ions into less accessible sites due to ageing. EXAFS suggested progressive fixation of Cd in the double six-ring (D6R) unit of the CaX structure. Proportional allocation of the apparent Cd-Si bond distance to two 'end-members', across all contact times, indicated that the bond distance for labile Cd was 3.41 angstrom and for non-labile (or fixed) Cd was 3.47 angstrom. (C) 2009 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available