Actions for Self-assembled monolayers on mesoporous support (SAMMS) technology for contaminant removal and stabilization [electronic resource].

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Self-assembled monolayers on mesoporous support (SAMMS) technology for contaminant removal and stabilization [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 1998.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
46 pages : digital, PDF file
Additional Creators
Pacific Northwest National Laboratory (U.S.), United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
A study of mercury-adsorption kinetics showed that at all pH values (3, t, 7 and 9), the adsorption by thiol-SAMMS occurred very rapidly (∼82 to 95% of total mercury adsorption occurred within the first 5 min). The adsorption equilibrium in all cases was attained with ∼4 h. At fixed solid:solution ratio, the mercury-loading density on thiol-SAMMS increased with decreasing iodide concentrations. The highest mercury loading of ∼270 mg/g of thiol-SAMMS was observed at an iodide concentration of ∼90 mmoL/L. Calculated free energy of adsorption value showed that Hg{sup 2+} ion has high affinity for thiol-groups. This strong adsorption affinity is typical of soft-cation/soft-base interaction. Very high distribution coefficient values indicated that thiol-SAMMS adsorbs mercury from KI-K₂SO₄ solutions with very high specificity.
Report Numbers
E 1.99:pnnl--12006
pnnl--12006
Subject(s)
Other Subject(s)
Note
Published through SciTech Connect.
09/01/1998.
"pnnl--12006"
"DE98059365"
"N/A"
Raymond, K.N.; Liu, J.; Feng, X.; Mattigod, S.V.; Gong, M.; Fryxell, G.E.; Nie, Z.
Funding Information
AC06-76RL01830
26757
View MARC record | catkey: 14137439