Extraction of Perchlorate Using Porous Organosilicate Materials

Materials

Brandy J. Johnson²  Iwona A. Leska³  Brian J. Melde²  Ronald L. Siefert¹  Anthony P. Malanoski²  Martin H. Moore²  Jenna R. Taft³ 

[1] Chemistry Department, US Naval Academy, Annapolis, MD 21402, USA; E-Mail:;Center for Bio/Molecular Science and Engineering, Naval Research Laboratory, Washington, DC 20375, USA; E-Mails:;NOVA Research Incorporated, Alexandria, VA 22308, USA; E-Mails:

关键词: periodic mesoporous organosilica;    perchlorate;    solid phase extraction;    groundwater monitoring;   

DOI  :  10.3390/ma6041403

来源: mdpi

【 摘 要 】

Sorbent materials were developed utilizing two morphological structures, comprising either hexagonally packed pores (HX) or a disordered pore arrangement (CF). The sorbents were functionalized with combinations of two types of alkylammonium groups. When capture of perchlorate by the sorbents was compared, widely varying performance was noted as a result of differing morphology and/or functional group loading. A material providing improved selectivity for perchlorate over perrhenate was synthesized with a CF material using N-trimethoxysilylpropyl-N,N,N-trimethylammonium chloride. Materials were applied in batch and column formats. Binding isotherms followed the behavior expected for a system in which univalent ligands of varying affinity compete for immobilized sites. Performance of the sorbents was also compared to that of commercial Purolite materials.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.