Effects of grain size and structural heterogeneity on the transport and retention of nano-TiO2 in saturated porous media

The Science of the Total Environment
Xueyan LvXiaoqing Shi

Abstract

Accurately predicting the fate and transport of nano-TiO2 in porous media is critical to assess its environmental impact. This study was designed to understand the effects of gain size and structural heterogeneity under different ionic strength (IS) on the fate and transport of nano-TiO2 in saturated porous media. In the columns packed homogenously with sand of different grain sizes (920, 550, 390, and 275μm), the transport of nano-TiO2 decreased when the IS increased from 0.1 to 1 or 10mM. For all the three IS conditions, the retention of the nano-TiO2 particles in the columns increased when the gain size decreased, and the mobility of the nano-TiO2 was the lowest in the sand at size of 275μm with recovery rates of 0.30% to 1.72%. The mass recovery rates of TiO2 in other homogeneous columns were higher and ranged from 0.37% to 59.9%. Structural heterogeneity created two flow domains for the retention and transport of nano-TiO2 particles in the saturated porous media. The fast-flow domain dominated the flow and transport processes of the nano-TiO2 in the heterogeneous columns under the tested conditions. As a result, the transport of nano-TiO2 in the heterogeneous porous media was faster and higher than that in the homogeneous ...Continue Reading

References

Jun 6, 2003·Environmental Science & Technology·Scott A BradfordScott R Yates
Nov 18, 2005·Journal of Contaminant Hydrology·Scott A Bradford, Mehdi Bettahar
Dec 2, 2008·Environmental Pollution·Damjana DrobneZiva Pipan Tkalec
Nov 21, 2009·Waste Management·Satinder K BrarR Y Surampalli
Jan 6, 2010·Environmental Health Perspectives·Barbara KarnMartha Otto
Dec 28, 2010·Water Research·Alexis A Porubcan, Shangping Xu
Jan 27, 2011·Journal of Environmental Monitoring : JEM·Wenchao DuHongyan Guo
Jun 7, 2011·Journal of Colloid and Interface Science·Indranil ChowdhurySharon L Walker
Mar 1, 2012·Journal of Hazardous Materials·Yuan TianLiuyan Yang
Aug 14, 2012·Journal of Hazardous Materials·Lucia Feriancikova, Shangping Xu
Sep 11, 2012·Langmuir : the ACS Journal of Surfaces and Colloids·Scott A Bradford, Saeed Torkzaban
Feb 27, 2013·Langmuir : the ACS Journal of Surfaces and Colloids·Scott A Bradford, Saeed Torkzaban
Feb 11, 2014·Environment International·D MinettoA Volpi Ghirardini
Mar 7, 2014·Environmental Science & Technology·Lei WuYakov A Pachepsky
Dec 3, 2014·Aquatic Toxicology·Fengmin LiZhenyu Wang
Dec 3, 2014·Journal of Contaminant Hydrology·Ivan ToloniPhilippe Ackerer
Dec 3, 2014·Journal of Hazardous Materials·Agathe BourEric Pinelli
May 20, 2015·The Science of the Total Environment·Peide SunJingyi Han
Jul 28, 2015·Journal of Contaminant Hydrology·Amgad SalamaShuyu Sun

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Citations

Apr 10, 2019·Environmental Science and Pollution Research International·Laura DegenkolbSondra Klitzke
Jun 26, 2020·Environmental Science and Pollution Research International·Meng MaoJianying Shang
Oct 4, 2017·Journal of Colloid and Interface Science·Hua ZhangDarsh Wasan
Apr 5, 2021·Journal of Hazardous Materials·Gang CaoGuilong Zhang
Dec 17, 2021·The Science of the Total Environment·Sylvie MotellierJérôme Labille

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