| | |
| | |
Stat |
Members: 3643 Articles: 2'487'895 Articles rated: 2609
29 March 2024 |
|
| | | |
|
Article overview
| |
|
Sorption of Eu(III) on Attapulgite Studied by Batch, XPS and EXAFS Techniques | Q.H. Fan
; X.L. Tan
; J.X. Li
; X.K. Wang
; W.S. Wu
; Gilles Montavon
; | Date: |
4 Dec 2009 | Abstract: | The effects of pH, ionic strength and temperature on sorption of Eu(III) on
attapulgite were investigated in the presence and absence of fulvic acid (FA)
and humic acid (HA). The results indicated that the sorption of Eu(III) on
attapulgite was strongly dependent on pH and ionic strength, and independent of
temperature. In the presence of FA/HA, Eu(III) sorption was enhanced at pH < 4,
decreased at pH range of 4 - 6, and then increased again at pH > 7. The X-ray
photoelectron spectroscopy (XPS) analysis suggested that the sorption of
Eu(III) might be expressed as ?X3Eu0 ?SwOHEu3+ and ?SOEu-OOC-/HA in the ternary
Eu/HA/attapulgite system. The extended X-ray absorption fine structure (EXAFS)
analysis of Eu-HA complexes indicated that the distances of d(Eu-O) decreased
from 2.451 to 2.360 {AA} with increasing pH from 1.76 to 9.50, whereas the
coordination number (N) decreased from ~9.94 to ~8.56. Different complexation
species were also found for the different addition sequences of HA and Eu(III)
to attapulgite suspension. The results are important to understand the
influence of humic substances on Eu(III) behavior in the natural environment. | Source: | arXiv, 0912.0785 | Services: | Forum | Review | PDF | Favorites |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser claudebot
|
| |
|
|
|
| News, job offers and information for researchers and scientists:
| |