Stabilization of highly concentrated suspensions of iron nanoparticles using shear-thinning gels of xanthan gum

被引：191

作者：

Comba, Silvia ^{[1
]}

Sethi, Rajandrea ^{[1
]}

机构：

[1] Politecn Torino, DITAG, Turin, Italy

来源：

WATER RESEARCH | 2009年 / 43卷 / 15期

关键词：

Nanoscale iron; Colloidal stabilization; Non-Newtonian fluids; Shear thinning; Xanthan; Gel; ZERO-VALENT IRON; POROUS-MEDIA; CARBOXYMETHYL CELLULOSE; MAGNETIC NANOPARTICLES; IN-VIVO; TRANSPORT; POLYMER; GROUNDWATER; MIXTURES; NANOIRON;

D O I：

10.1016/j.watres.2009.05.046

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Nanoscale zerovalent iron (NZVI) particles have recently become subject of great interest in the field of groundwater remediation for their ability to treat a wide variety of organic and inorganic contaminants. However, the field application of this technology is strongly hindered by the lack of stability of NZVI water suspensions. This study demonstrates that highly concentrated NZVI slurries (15 g/L) can be stabilized for more than 10 days adding 6 g/L of xanthan gum biopolymer. Stability against aggregation and sedimentation was achieved in the range of ionic strength 6 x 10(-3)-12 mM and is mainly due to the formation of a viscous gel characterized by shear-thinning behaviour. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：3717 / 3726

页数：10

共 54 条

[1] Geochemical and isotopic evidence of a groundwater source in the Corral Canyon meadow complex, central Nevada, USA [J].