Abstract：
:The adsorption of Cs by montmorillonite and the effects of experimental conditions on adsorption were investigated by using (134)Cs as a radioactive tracer. Additionally, the Cs-adsorbed and the modified montmorillonite were analyzed by X-ray Diffractometer System (XRD) and Scanning Electron Microscopy (SEM). The results showed that the adsorption of Cs by montmorillonite was efficient in the initial concentration (C(0)) of 30 microg/L Cs nitrate solution with 20 g/L montmorillonite at room temperature. In this condition, more than 98% Cs(+) ions could be adsorbed at pH approximately 8. The adsorption equilibrium was achieved within 5 min and the relationship between the concentration of Cs(+) in aqueous solutions and adsorption capacities of Cs(+) can be described by the Langmuir adsorption isotherm. The adsorption rate would decrease when temperature increase from 0 degrees C to 50 degrees C or in presence of coexistent K(+), Na(+) and Ca(2+), while modification by (NH(4))(2)SO(4), [Ag(NH(3))(2)](+), [Cu(NH(3))(4)](2+) or 450 degrees C could improve the adsorption abilities of montmorillonite for Cs(+). However, more than 89% of adsorbed Cs(+) on montmorillonite could be desorbed by 2 mol/L HNO(3) solutions. The XRD and SEM analysis further showed that the structure of the Cs-adsorbed or modified montmorillonite were different from that of the original one.
journal_name
J Environ Radioactjournal_title
Journal of environmental radioactivityauthors
Wu J,Li B,Liao J,Feng Y,Zhang D,Zhao J,Wen W,Yang Y,Liu Ndoi
10.1016/j.jenvrad.2009.06.024subject
Has Abstractpub_date
2009-10-01 00:00:00pages
914-20issue
10eissn
0265-931Xissn
1879-1700pii
S0265-931X(09)00152-0journal_volume
100pub_type
杂志文章abstract：:The CONFIDENCE project is performing research on uncertainties in emergency management and post-accident recovery. It concentrates on the early and transition phases of an emergency, but considers also longer-term decisions made during these phases. To ensure success, the project brings together expertise from four Eu...
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journal_title：Journal of environmental radioactivity
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journal_title：Journal of environmental radioactivity
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journal_title：Journal of environmental radioactivity
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journal_title：Journal of environmental radioactivity
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journal_title：Journal of environmental radioactivity
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