Influence of Typical Anions on the Transport of Titanium Dioxide Nanoparticles in Iron Oxide-Coated Porous Media

被引：0
|
作者：
Luo X. [1 ,2 ]
Wu D. [2 ]
Liang J. [2 ]
Tong M. [1 ,2 ]
机构：
[1] School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen
[2] Key Laboratory of Water and Sediment Sciences (MOE), College of Environmental Sciences and Engineering, Peking University, Beijing
来源：
Tong, Meiping (tongmeiping@pku.edu.cn) | 1600年 / Peking University卷 / 53期
关键词：
Anions; Deposition; Porous media; Titanium dioxide nanoparticles; Transport;
D O I：
10.13209/j.0479-8023.2017.090
中图分类号：
学科分类号：
摘要：
This study investigated the effects of typical anions such as Cl-, NO3-, SO42-, and PO43- on the transport and deposition behaviors of titanium dioxide nanoparticles (nTiO2) in iron oxide-coated sand under environmental related conditions (ionic strength and pH). In iron oxide-coated sand, the breakthrough curves and retained profiles of nTiO2 were equivalent in NaCl, NaNO3, and Na2SO4 solutions. However, under the same solution conditions (ionic strength and pH), the breakthrough curves of nTiO2 in the NaH2PO4 solution were higher yet the retained profiles were lower relative to other three solutions. The results indicated that under the examined solution conditions (pH and ionic strength), Cl-, NO3-, and SO42- had similar effects on the transport of nTiO2 in iron-coated sand, yet the presence of PO43- could facilitate the transport of nTiO2. The alteration of the surface properties of both nanoparticles and porous media, the change of particle sizes, as well as the competition of deposition sites on sand grain surfaces by PO43- ions contributed to the increased nTiO2 transport in iron oxide-coated sand in NaH2PO4 solutions. © 2017 Peking University.
引用
收藏
页码：749 / 757
页数：8
相关论文
共 20 条
  • [1] Chowdhury I., Cwiertny D.M., Walker S.L., Combined factors influencing the aggregation and deposition of nano-TiO<sub>2</sub> in the presence of humic acid and bacteria, Environmental Science & Technology, 46, 13, pp. 6968-6976, (2012)
  • [2] Cai L., Tong M., Ma H., Et al., Cotransport of titanium dioxide and fullerene nanoparticles in saturated porous media, Environmental Science & Technology, 47, 11, pp. 5703-5710, (2013)
  • [3] Otero N., Vitoria L., Soler A., Et al., Fertiliser characterisation: major, trace and rare earth elements, Applied Geochemistry, 20, 8, pp. 1473-1488, (2005)
  • [4] Diaz-Cruz M.S., Barcelo D., Trace organic chemicals contamination in ground water recharge, Chemosphere, 72, 3, pp. 333-342, (2008)
  • [5] Whittemore D.O., Potential impacts of stormwater runoff on water quality in urban sand pits and adjacent groundwater, Journal of the American Water Resources Association, 48, 3, pp. 584-602, (2012)
  • [6] Kuroda K., Murakami M., Oguma K., Et al., Assessment of groundwater pollution in Tokyo using PPCPs as sewage markers, Environmental Science & Technology, 46, 3, pp. 1455-1464, (2012)
  • [7] Li L., Schuster M., Influence of phosphate and solution pH on the mobility of ZnO nanoparticles in saturated sand, Science of the Total Environment, 472, pp. 971-978, (2014)
  • [8] Ryan J.N., Gschwend P.M., Effect of iron diagenesis on the transport of colloidal clay in an unconfined sand aquifer, Geochimica et Cosmochimica Acta, 56, 4, pp. 1507-1521, (1992)
  • [9] Johnson P.R., Sun N., Elimelech M., Colloid transport in geochemically heterogeneous porous media: model- ing and measurements, Environmental Science & Technology, 30, 11, pp. 3284-3293, (1996)
  • [10] Ryan J.N., Elimelech M., Ard R.A., Et al., Bacteriophage PRD1 and silica colloid transport and recovery in an iron oxide-coated sand aquifer, Environmental Science & Technology, 33, 1, pp. 63-73, (1999)
12