کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4425456 | 1309104 | 2011 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Transport of copper as affected by titania nanoparticles in soil columns Transport of copper as affected by titania nanoparticles in soil columns](/preview/png/4425456.png)
The effects of TiO2 nanoparticles on the transport of Cu through four different soil columns were studied. For two soils (HB and DX), TiO2 nanoparticles acted as a Cu carrier and facilitated the transport of Cu. For a third soil (BJ) TiO2 nanoparticles also facilitated Cu transport but to a much lesser degree, but for a fourth soil (HLJ) TiO2 nanoparticles retarded the transport of Cu. Linear correlation analysis indicated that soil properties rather than sorption capacities for Cu primary governed whether TiO2 nanoparticles-facilitated Cu transport. The TiO2-associated Cu of outflow in the Cu-contaminated soil columns was significantly positively correlated with soil pH and negatively correlated with CEC and DOC. During passage through the soil columns 46.6–99.9% of Cu initially adsorbed onto TiO2 could be “stripped” from nanoparticles depending on soil, where Cu desorption from TiO2 nanoparticles increased with decreasing flow velocity and soil pH.
► TiO2 nanoparticles could facilitate or retard the transport of Cu in soils.
► Soil properties primarily governed TiO2-facilitated Cu transport.
► Cu initially adsorbed onto TiO2 could be “stripped” duing transport.
Journal: Environmental Pollution - Volume 159, Issue 5, May 2011, Pages 1248–1256