title: Transport of copper as affected by titania nanoparticles in soil columns.
abstract: 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.
authors.affiliation: School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Fang
authors.forename: Xiao-quan
authors.initials: XQ
authors.lastname: Shan
authors.forename: Bei
authors.initials: B
authors.lastname: Wen
authors.forename: Jin-ming
authors.initials: JM
authors.lastname: Lin
authors.forename: Gary
authors.initials: G
authors.lastname: Owens
authors.forename: Shuai-ren
authors.initials: SR
authors.lastname: Zhou
mesh_terms: D000327:Adsorption; D003300:Copper / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry*; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000737:chemistry*; D014025:Titanium / Q000737:chemistry*
chemical_list: D012987:Soil; D012989:Soil Pollutants; C009495:titanium dioxide; D003300:Copper; D014025:Titanium