期刊
WATER RESEARCH
卷 43, 期 15, 页码 3717-3726出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2009.05.046
关键词
Nanoscale iron; Colloidal stabilization; Non-Newtonian fluids; Shear thinning; Xanthan; Gel
资金
- Regione Piemonte (Italy) [CIPE-C30]
- Lagrange Grant from Fondazione C.R.T. (Italy)
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.
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