Self-assembled monolayers on mesoporous support (SAMMS) technology for contaminant removal and stabilization

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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 ({approximately}82 to 95% of total mercury adsorption occurred within the first 5 min). The adsorption equilibrium in all cases was attained with {approximately}4 h. At fixed solid:solution ratio, the mercury-loading density on thiol-SAMMS increased with decreasing iodide concentrations. The highest mercury loading of {approximately}270 mg/g of thiol-SAMMS was observed at an iodide concentration of {approximately}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 ... continued below

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46 p.

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Liu, J.; Fryxell, G.E.; Mattigod, S.V.; Gong, M.; Nie, Z.; Feng, X. et al. September 1, 1998.

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Description

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 ({approximately}82 to 95% of total mercury adsorption occurred within the first 5 min). The adsorption equilibrium in all cases was attained with {approximately}4 h. At fixed solid:solution ratio, the mercury-loading density on thiol-SAMMS increased with decreasing iodide concentrations. The highest mercury loading of {approximately}270 mg/g of thiol-SAMMS was observed at an iodide concentration of {approximately}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-K{sub 2}SO{sub 4} solutions with very high specificity.

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46 p.

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OSTI as DE98059365

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  • Other Information: PBD: Sep 1998

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  • Other: DE98059365
  • Report No.: PNNL--12006
  • Grant Number: AC06-76RL01830
  • DOI: 10.2172/663548 | External Link
  • Office of Scientific & Technical Information Report Number: 663548
  • Archival Resource Key: ark:/67531/metadc706721

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  • September 1, 1998

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  • Sept. 12, 2015, 6:31 a.m.

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  • May 18, 2016, 2:31 p.m.

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Liu, J.; Fryxell, G.E.; Mattigod, S.V.; Gong, M.; Nie, Z.; Feng, X. et al. Self-assembled monolayers on mesoporous support (SAMMS) technology for contaminant removal and stabilization, report, September 1, 1998; Richland, Washington. (digital.library.unt.edu/ark:/67531/metadc706721/: accessed November 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.