Selective capture of cesium and thallium from natural waters and simulated wastes with copper ferrocyanide functionalized mesoporous silica

JOURNAL OF HAZARDOUS MATERIALS

卷:182

Article

Sangvanich, Thanapon¹  Sukwarotwat, Vichaya²  Wiacek, Robert J.²  Grudzien, Rafal M.²  Fryxell, Glen E.²  Addleman, R. Shane²  Timchalk, Charles²  Yantasee, Wassana¹ 

[1] Oregon Hlth & Sci Univ, Sch Med, Portland, OR 97239 USA

[2] Pacific NW Natl Lab, Richland, WA 99352 USA

关键词: Ferrocyanide;    Mesoporous silica;    Cesium;    Thallium;    Prussian Blue;   

DOI  :  10.1016/j.jhazmat.2010.06.019

来源: Elsevier

【 摘 要 】

Copper(II) ferrocyanide on mesoporous silica (FC-Cu-EDA-SAMMS (TM)) has been evaluated against iron(III) hexacyanoferrate(II) (insoluble Prussian Blue) for removing cesium (Cs+) and thallium (Tl+) from natural waters and simulated acidic and alkaline wastes. From pH 0.1-7.3, FC-Cu-EDA-SAMMS had greater affinities for Cs and Tl and was less affected by the solution pH, competing cations, and matrices. SAMMS also outperformed Prussian Blue in terms of adsorption capacities (e.g., 21.7 versus 2.6 mg Cs/g in acidic waste stimulant (pH 1.1), 28.3 versus 5.8 mg Tl/g in seawater), and rate (e.g., over 95 wt% of Cs was removed from seawater after 2 min with SAMMS, while only 75 wt% was removed with Prussian Blue). SAMMS also had higher stability (e.g., 2.5-13-fold less Fe dissolved from 2 to 24 h of contact time). In addition to environmental applications, SAMMS has great potential to be used as orally administered drug for limiting the absorption of radioactive Cs and toxic Tl in gastrointestinal tract. (C) 2010 Elsevier B.V. All rights reserved.

【 授权许可】

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