Transport of TiO 2 and CeO 2 nanoparticles in saturated porous media in the presence of surfactants with environmentally relevant concentrations.

Autor: Dai C; College of Civil Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, People's Republic of China., Shen H; College of Civil Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, People's Republic of China., Duan Y; School of Environmental and Geographical Sciences, Shanghai Normal University, 100 Guilin Rd., Shanghai, 200234, People's Republic of China. duanyanping@shnu.edu.cn.; Institute of Urban Studies, Shanghai Normal University, 100 Guilin Road, Shanghai, 200234, China. duanyanping@shnu.edu.cn.; Yangtze Delta Wetland Ecosystem National Filed Scientific Observation and Research Station, Shanghai, People's Republic of China. duanyanping@shnu.edu.cn., You X; College of Civil Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, People's Republic of China. xjyou@tongji.edu.cn.; Department of Civil, Architectural, and Environmental Engineering, The University of Texas at Austin, 301 E. Dean Keeton St., Stop C1786, Austin, TX, 78712, USA. xjyou@tongji.edu.cn., Lai X; College of Management and Economics, Tianjin University, Tianjin, 300072, People's Republic of China., Liu S; College of Civil Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, People's Republic of China., Zhang Y; College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, People's Republic of China., Hon LK; Fac Engn & Green Technol, Dept Environm Engn, Univ Tunku Abdul Rahman, 31900, Kampar, Perak, Malaysia., Baek K; Department of Environment & Energy and Soil Environment Research Center, Jeonbuk National University, Jeonju, Jeollabukdo, 57896, Republic of Korea., Tu Y; School of Environmental and Geographical Sciences, Shanghai Normal University, 100 Guilin Rd., Shanghai, 200234, People's Republic of China., Zhou L; Department of Civil, Architectural, and Environmental Engineering, The University of Texas at Austin, 301 E. Dean Keeton St., Stop C1786, Austin, TX, 78712, USA., Xu D; School of Environmental and Geographical Sciences, Shanghai Normal University, 100 Guilin Rd., Shanghai, 200234, People's Republic of China.
Jazyk: angličtina
Zdroj: Environmental science and pollution research international [Environ Sci Pollut Res Int] 2022 Feb; Vol. 29 (6), pp. 9306-9317. Date of Electronic Publication: 2021 Sep 09.
DOI: 10.1007/s11356-021-16266-3
Abstrakt: Nanomaterials are threatening the environment and human health, but there has been little discussion about the stability and mobility of nanoparticles (NPs) in saturated porous media at environmentally relevant concentrations of surfactants, which is a knowledge gap in exploring the fate of engineered NPs in groundwater. Therefore, the influences of the anionic surfactant (sodium dodecylbenzene sulfonate, SDBS), the cationic surfactant (cetyltrimethylammonium bromide, CTAB), and the nonionic surfactant (Tween-80) with environmentally relevant concentrations of 0, 5, 10, and 20 mg/L on nano-TiO 2 (nTiO 2 , negatively charged) and nano-CeO 2 (nCeO 2 , positively charged) transport through saturated porous media were examined by column experiments. On the whole, with increasing SDBS concentration from 0 to 20 mg/L, the concentration peak of nTiO 2 and nCeO 2 in effluents increased by approximately 0.2 and 0.3 (dimensionless concentration, C/C 0 ), respectively, because of enhanced stability and reduced aggregate size resulting from enhanced electrostatic and steric repulsions. By contrast, the transportability of NPs significantly decreased with increasing CTAB concentration due to the attachment of positive charges, which was opposite to the charge on the medium surface and facilitated the NP deposition. On the other hand, the addition of Tween-80 had no significant influence on the stability and mobility of nTiO 2 and nCeO 2 . The results were also demonstrated by the colloid filtration theory (CFT) modeling and the Derjaguin-Landau-Verwey-Overbeek (DLVO) interaction calculations; it might promote the assessment and remediation of NP pollution in subsurface environments.
(© 2021. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
Databáze: MEDLINE
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