Please use this identifier to cite or link to this item:
Title: Formation, aggregation, and deposition dynamics of NOM-iron colloids at anoxic-oxic interfaces
Authors: Liao, P
Li, WL
Jiang, Y 
Wu, JW
Yuan, SH
Fortner, JD
Giammar, DE
Issue Date: 2017
Publisher: American Chemical Society
Source: Environmental science & technology, 7 Nov. 2017, v. 51, no. 21, p. 12235-12245 How to cite?
Journal: Environmental science & technology 
Abstract: The important role of natural organic matter (NOM)-Fe colloids in influencing contaminant transport, and this role can be influenced by the formation, aggregation, and particle deposition dynamics of NOM-Fe colloids. In this work, NOM-Fe colloids at different C/Fe ratios were prepared by mixing different concentrations of humic acid (HA) with 10 mg/L Fe(II) under anoxic conditions. The colloids were characterized by an array of techniques and their aggregation and deposition behaviors were examined under both anoxic and oxic conditions. The colloids are composed of HA-Fe(II) at anoxic conditions, while they are made rip of HA-Fe(III) at oxic conditions until the C/Fe molar ratio exceeds 1.6. For C/Fe molar ratios above 1.6, the aggregation and deposition kinetics of HA-Fe(II) colloids under anoxic conditions are slower than those of HA-Fe(III) colloids under oxic conditions. Further, the aggregation of HA-Fe colloids under both anoxic and oxic conditions decreases with increasing C/Fe molar 23.3. This study highlights the importance of the redox transformation of Fe(II) to Fe(III) and the C/Fe ratio and stability of NOM-Fe colloids that occur in subsurface environments with anoxic-oxic interfaces.
ISSN: 0013-936X
EISSN: 1520-5851
DOI: 10.1021/acs.est.7b02356
Appears in Collections:Journal/Magazine Article

View full-text via PolyU eLinks SFX Query
Show full item record


Citations as of Dec 15, 2018


Last Week
Last month
Citations as of Dec 16, 2018

Page view(s)

Citations as of Dec 10, 2018

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.