Influence of flow rate on the transport of nTiO2 and phosphate and its modeling

Gang Feng; Gang Feng; Nan Xu; Zuling Li; Zuling Li; Yuhe Cao; Yuhe Cao; Keqing Sun; Keqing Sun

doi:10.24294/can.v4i1.1328

Influence of flow rate on the transport of nTiO2 and phosphate and its modeling

Gang Feng, Gang Feng, Nan Xu, Zuling Li, Zuling Li, Yuhe Cao, Yuhe Cao, Keqing Sun, Keqing Sun

Article ID: 1328
Vol 4, Issue 1, 2021

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Abstract

We studied Zeta potentials of nanoparticles titanium dioxides （nTiO2） in different concentration of NaNO3 and phosphate (P) solutions. In addition, the effect of flow rate on the transport of nTiO₂in P was investigated at pH＝6.5. Experimental results show that the Zeta potential of nTiO₂is compressed with the increasing ion concentration (IC) of NaNO3 at pH＝6.5. The negative charge increases with the augment of P. Therefore, the high P and low NaNO3 induce the stabilization of nTiO₂aggregates. The transport experiments suggest that the rapid flow rate is favorable for the transportability of nTiO₂and soluble phosphate. The breakthrough transport curves (BTCs) of nTiO₂in sand columns can be fitted well with two-site kinetic attachment model. The modeling results suggest that the values of first-order attachment rate coefficients (k₂) and detachment rate coefficients (k_2d) on site 2 and first-order attachment rate coefficients (k₁) on site 1 are responsible to the attaching efficiency of nTiO₂on sands and their transportability.

Keywords

nTiO2; Zeta Potential; Transport; Phosphate

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References

1. Fang J, Shan X, Wen B, et al. Stability of titania nanoparticles in soil suspensions and transport in saturated homogeneous soil columns. Environmental Pollution 2009; 157(4)：110–109.

2. Higashi MM, Jardim WF. Remediation of pesticide contaminated soil using TiO2, mediated by solar light. Catalysis Today 2002; 76(2-4): 201–207.

3. Nagaveni K, Sivalingam G, Hegde MS, et al. Photocatalytic degradation of organic compounds over combustion-synthesized nano-TiO2. Environmental Science & Technology 2004; 38(5): 1600–1604.

4. Quan X, Zhao X, Chen S, et al. Enhancement of p, p’-DDT photodegradation on soil surfaces using TiO2 induced by UV-light. Chemosphere 2005; 60(2): 266–273.

5. And TA, Madras G. Photocatalytic degradation of rhodamine dyes with nano-TiO2. Industrial & Engineering Chemistry Research 2007; 46(1): 1–7.

6. Wei J, Hamid M, Baoshan X. Bacterial toxicity comparison between nano- and micro-scaled oxide particles. Environmental Pollution 2009; 157(5): 1619–1625.

7. Hund-Rinke K, Simon M. Ecotoxic effect of photocatalytic active nanoparticles (TiO2) on algae and daphnids. Environmental Science & Pollution Research 2006; 13(4): 225–232.

8. Saleh N, Kim H, Phenrat T, et al. Ionic strength and composition affect the mobility of surface-modified FeO nanoparticles in water-saturated sand columns. Environmental Science & Technology 2008; 42(9): 3349–3355.

9. French RA, Jacoboson AR, Bojeong K, et al. Influence of ionic strength, pH, and cation valence on aggregation kinetics of titanium dioxide nanoparticles. Environmental Science & Technology 2009; 43(5): 1354–1359.

10. Healy KE, Ducheyne P. Hydration and preferential molecular adsorption on titanium in vitro. Biomaterials 1992; 13(8): 553–561.

11. Kaushik RD, Gupta VK, Singh JP. Distribution of zinc, cadmium, and copper forms in soils as influenced by phosphorus application. Arid Soil Research & Rehabilitation 2009; 7(2): 163–171.

12. Chen J, Gao F, Sun X. Determination of phosphorus content in alcoholic by molybdenum blue extraction photometric method. Chemical Engineer 2005; 115(4): 29–30.

13. Schijyen JF, Simunek J. Kinetic modeling of virus transport at the field scale. Journal of Contaminant Hydrology 2002; 55(1-2): 113–135.

14. Bradford SA, Simunek J, Bettahar M, et al. Modeling colloid attachment, straining, and exclusion in saturated porous media. Environmental Science & Technology 2003; 37(10): 2242–2250.

15. Marquardt DW. An algorithm for least-squares estimation of nonlinear parameters. Journal of the Society for Industrial & Applied Mathematics 2006; 11(2): 431–441.

16. Elimelech M, Gregory J, Jia X, et al. Particle deposition and aggregation：Measurement modeling and simulation. Woburn：BuaerworthHeinemann; 1995.

17. Hunter RJ. Foundations of colloid science. New York: Oxford University Press; 1987.

18. Solovitch N, Labille J, Rose J, et al. Concurrent aggregation and deposition of TiO2 nanoparticles in a sandy porous media. Environmental Science & Technology 2010; 44(13)：4897–4902.

19. Pelley AJ, Tufenkji N. Effect of particle size and natural organic matter on the migration of nano-and microscale latex particles in saturated porous media. Journal of Colloid & Interface Science 2008; 321(1): 74–83.

20. Wang D, Bradford SA, Paradelo M, et al. Facilitated transport of copper with hydroxyapatite nanoparticles in saturated sand. Soil Science Society of America Journal 2012; 76(2): 375–388.

21. Gargiulo G, Bradford SA, Simunek J, et al. Transport and deposition of metabolically active and stationary phase deinococcus radiodurans in unsaturated porous media. Environmental Science & Technology 2007; 41(4): 1265–1271.

22. Gargiulo G, Bradford SA, Simunek J, et al. Bacteria transport and deposition under unsaturated flow conditions: The role of water content and bacteria surface hydrophobicity. Vadose Zone Journal 2008; 7(2): 406–419.

23. Bradford SA, Torkzaban S, Wiegmann A. Pore-scale simulations to determine the applied hydrodynamic torque and colloid immobilization. Vadose Zone Journal 2010; 10(1): 252–261.

DOI: https://doi.org/10.24294/can.v4i1.1328