Evaluating Filter Efficiency for TiO₂ Nanoparticle Deposition under Various Water Chemistry and Simulated Conditions

Abstract:

This study aimed to evaluate filter efficiency for TiO₂ nanoparticle deposition across varied water chemistry and simulated conditions. The experimental results provided collision attachment efficiencies (α) of 0.001, 0.002, and 0.01 and filter coefficients (λ) of -0.003, -0.01, and -0.02. The authors used these collision attachment efficiencies to assess filter efficacy under simulated conditions, mainly removing naturally occurring nanoparticles spanning sizes from 1 to 100 nm. This experiment uncovered a strong correlation between TiO₂ nanoparticle deposition and water ionic strength, with aggregation becoming more pronounced as ionic strength increased. This phenomenon was especially prominent in instances lacking alum addition. Notably, the presence of alum resulted in the nanoparticles maintaining a dispersed state in the water, attaining enhanced stability by introducing excessive positive charges. Consequently, this study underscores how manipulating water's ionic strength can effectively induce nanoparticle destabilization during filtration. The implications of these findings are significant, as practical data about the behavior of diminutive like TiO₂ nanoparticles has been notably lacking.

• Periodical: Solid State Phenomena (Volume 363)
• Pages: 143-148
• DOI: https://doi.org/10.4028/p-sAiw2U
• Online since: September 2024
• Authors: Elsadig Abdallah, Abulmaali M.Y. Taher*
• Keywords: Aggregation, Deposition, Filter Efficiency, Ionic Strength, TiO₂ Nanoparticle

References

[1] Crittenden, J., & Harza, M. W., Water treatment: Principles and design John Wiley & Sons, (2012)..

[2] Escorcia-Díaz, D., García-Mora, S., Rendón-Castrillón, L., Ramírez-Carmona, M., Ocampo-López, C. (2023). Advancements in Nanoparticle Deposition Techniques for Diverse Substrates: A Review. Nanomaterials, 13, 2586. https://doi.org/10.3390/ nano13182586.

DOI: 10.3390/nano13182586

[3] Yao, K. M., Habibian, M. T., & O'Melia, C. R. (1971). Water and wastewater filtration. Concepts and applications. Environmental Science & Technology, 5(11), 1105-1112.

DOI: 10.1021/es60058a005

[4] Espinasse, B., Hotze, E. M., & Wiesner, M. R. (2007). Transport and retention of colloidal aggregates of C60 in porous media: Effects of organic macromolecules, ionic composition, and preparation method. Environmental Science & Technology, 41(21), 7396-7402.

DOI: 10.1021/es0708767

[5] Hahn, M. W., & O'Melia, C. R. (2004). Deposition and entrainment of Brownian particles in porous media under unfavorable chemical conditions: Some concepts and applications. Environmental Science & Technology, 38(1), 210-220.

DOI: 10.1021/es030416n

[6] Lecoanet, H. F., Bottero, J. Y., & Wiesner, M. R. (2004). Laboratory assessment of the mobility of nanomaterials in porous media. Envi. Science & Technology, 38(19), 5164-5169.

DOI: 10.1021/es0352303

[7] Yiacoumi, S. (2010). Coagulation and flocculation. Water Quality & Treatment: A Handbook on Drinking Water.

[8] Jegatheesan, V., & Vigneswaran, S. (2005). Deep bed filtration: Mathematical models and observations. Critical Reviews in Environmental Science and Technology, 35(6), 515-569.

DOI: 10.1080/10643380500326432

[9] Wiesner, M. R., & Jean-Yves. Bottero. (2007). Environmental nanotechnology McGraw Hill Professional.

[10] Sellers, K. (2009). Nanotechnology and the environment. Boca Raton: CRC Press.

[11] Guzman, K. A. D., Finnegan, M. P., & Banfield, J. F. (2006). Influence of surface potential on aggregation and transport of titania nanoparticles. Environmental Science & Technology, 40(24), 7688-7693.

DOI: 10.1021/es060847g

[12] McDowell-Boyer, L. M., Hunt, J. R., & Sitar, N. (1986). Particle transport through porous media. Water Resour.Res, 22(13), 1901-1921.

DOI: 10.1029/wr022i013p01901

[13] O'Melia, C. R., & Stumm, W. (1967). Theory of water filtration. Perret, D., Newman, M. E., Negre, J. C., Chen, Y., & Buffle, J. (1994). Submicron particles in the Rhine River. Physicochemical characterization. Water Research, 28(1), 91-106.

DOI: 10.1016/0043-1354(94)90123-6

[14] Bratby, J. (2006). Coagulation and flocculation in water and wastewater treatment Intl Water Assn.

[15] Limbach, L. K., Bereiter, R., Mu ller, E., Krebs, R., Ga lli, R., & Stark, W. J. (2008). Removal of oxide nanoparticles in a model wastewater treatment plant: Influence of agglomeration and surfactants on clearing efficiency. Environmental Science & Technology, 42(15), 5828-5833.

DOI: 10.1021/es800091f