Efecto de la presencia de sales inorgánicas sobre la inactivación fotocatalítica de E. Coli en agua
Main Article Content
Keywords
fotocatálisis, TiO2, desinfección, sales inorgánicas, cinética.
Resumen
En este artículo se presenta el efecto de las sales inorgánicas MgSO4, NaCl y CaCO3 en la desinfección fotocatalítica del agua. Se usó TiO2-P25 como fotocatalizador y E. Coli como microorganismo contaminante. Las pruebas de desinfección se realizaron mediante la iluminación controlada de reactores batch cargados con agua contaminada, sales y TiO2. Los resultados de estas pruebas fueron usados para determinar los parámetros cinéticos de un modelo tipo Langmuir-Hinshelwood. Se encontró que las sales tienen una fuerte influencia sobre la inactivación fotocatalítica de E. Coli, y que cada sal y su concentración afectan la desinfección de forma diferente y en el siguiente orden: NaCl>CaCO3>>MgSO4. Adicionalmente, el valor de los parámetros calculados fue diferente para cada sal, evidenciando que las sales afectan el proceso por varios mecanismos relacionados con las interacciones ion-bacteria, ion-especie oxidante e ion-TiO2.
PACS: 82.65..+r, 61.82.Fk, 82.50.-m
MSC: 65c20, 34-99
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Referencias
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[2] V. A. Nadtochenko, A. G. Rincon, S. E. Stanca, and J. Kiwi, “Dynamics of E-coli membrane cell peroxidation during TiO2 photocatalysis studied by ATR-FTIR spectroscopy and AFM microscopy,” Journal of Photochemistry and Photobiology A-Chemistry, vol. 169, no. 2, pp. 131–137, 2005.
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[4] J. Lonnen, S. Kilvington, S. C. Kehoe, F. Al-Touati, and K. G. McGuigan, “Solar and photocatalytic disinfection of protozoan, fungal and bacterial microbes in drinking water,” Water Research, vol. 39, no. 5, pp. 877–883, 2005. [Online]. Available: http://www.sciencedirect.com/science/article/pii/S0043135404005640
[5] A. Fujishima, X. Zhang, and D. A. Tryk, “TiO2 photocatalysis and related surface phenomena,” Surface Science Reports, vol. 63, no. 12, pp. 515–582, 2008. [Online]. Available: http://www.sciencedirect.com/science/article/pii/S0167572908000757
[6] M. Cho, H. Chung, W. Choi, and J. Yoon, “Linear correlation between inactivation of E. coli and OH radical concentration in TiO2 photocatalytic disinfection,” Water Research, vol. 38, no. 4, pp. 1069–1077, 2004. [Online]. Available: http://www.sciencedirect.com/science/article/pii/S004313540300602X
[7] A. G. Rincón and C. Pulgarin, “Photocatalytical inactivation of E. coli: effect of (continuous intermittent) light intensity and of (suspended-fixed) TiO2 concentration,” Applied Catalysis B: Environmental, vol. 44, no. 3, pp. 263–284, 2003. [Online]. Available: http://www.sciencedirect.com/science/article/pii/S0926337303000766
[8] C. Sichel, J. Tello, M. de Cara, and P. Fernández-Ibáñez, “Effect of UV solar intensity and dose on the photocatalytic disinfection of bacteria and fungi,” Catalysis Today, vol. 129, no. 1–2, pp. 152–160, 2007. [Online]. Available: http://www.sciencedirect.com/science/article/pii/S092058610700421X
[9] H. M. Coleman, C. P. Marquis, J. A. Scott, S.-S. Chin, and R. Amal, “Bactericidal effects of titanium dioxide-based photocatalysts,” Chemical Engineering Journal, vol. 113, no. 1, pp. 55–63, 2005. [Online]. Available: http://www.sciencedirect.com/science/article/pii/S1385894705002494
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[11] A. G. Rincon and C. Pulgarin, “Effect of pH, inorganic ions, organic matter and H2O2 on E-coli K12 photocatalytic inactivation by TiO2 - Implications in solar water disinfection,” Applied Catalysis B: Environmental, vol. 51, no. 4, pp. 283–302, 2004.
[12] C. Castro, C. Romero, O. Salazar, A. Centeno, and S. Giraldo, “Efecto de la Composición Química del Agua Sobre su Desinfección Fotocatalítica,” Act. y Div. Cient., vol. 14, no. 1, pp. 117–125, 2011.
[13] J. Marugán, R. van Grieken, C. Sordo, and C. Cruz, “Kinetics of the photocatalytic disinfection of Escherichia coli suspensions,” Applied Catalysis B: Environmental, vol. 82, no. 1–2, pp. 27–36, 2008. [Online]. Available: http://www.sciencedirect.com/science/article/pii/S0926337308000052
[14] A. Moreno, C. Castro, A. Centeno, and S. Giraldo, “Cinética de la Desinfección Fotocatalítica de Agua contaminada con E. coli: Efecto de la Concentración del Fotocatalizador y la Potencia de Irradiación,” Inf. tecnol., vol. 22, no. 3, pp. 69–78, 2011.
[15] O. K. Dalrymple, E. Stefanakos, M. A. Trotz, and D. Y. Goswami, “A review of the mechanisms and modeling of photocatalytic disinfection,” Applied Catalysis B: Environmental, vol. 98, no. 1–2, pp. 27–38, 2010. [Online]. Available: http://www.sciencedirect.com/science/article/pii/S0926337310001918
[16] M. Labas, C. Martin, and A. Cassano, “Kinetics of Bacteria Disinfection with UV Radiation in an Absorbing and Nutritious Medium,” Chemical Engineering Journal, vol. 114, no. 1-3, pp. 87–97, 2005.
[17] K. V. Kumar, K. Porkodi, and F. Rocha, “Langmuir-Hinshelwood kinetics: A theoretical study,” Catalysis Communications, vol. 9, no. 1, pp. 82–84, 2008. [Online]. Available: http://www.sciencedirect.com/science/article/pii/S1566736707002178
[18] G. Gogniat and S. Dukan, “TiO2 photocatalysis causes DNA damage via Fenton reaction-generated hydroxyl radicals during the recovery period.” Appl Environ Microbiol, vol. 73, no. 23, pp. 77–40–7743, 2007.
[19] M. Abdullah, G. K. C. Low, and R. W. Matthews, “Effects of common inorganic anions on rates of photocatalytic oxidation of organic carbon over illuminated titanium dioxide,” J. Phys. Chem., vol. 94, no. 17, pp. 6820–6825, 1990. [Online]. Available: http://pubs.acs.org/doi/abs/10.1021/j100380a051
[20] R. van Grieken, J. Marugán, C. Pablos, L. Furones, and A. López, “Comparison between the photocatalytic inactivation of Gram-positive E. faecalis and Gramnegative E. coli faecal contamination indicator microorganisms,” Applied Catalysis B: Environmental, vol. 100, no. 1–2, pp. 212–220, 2010. [Online]. Available: http://www.sciencedirect.com/cience/article/pii/S0926337310003401
[21] M. N. Chong, B. Jin, H. Zhu, and C. Saint, “Bacterial inactivation kinetics, regrowth and synergistic competition in a photocatalytic disinfection system using anatase titanate nanofiber catalyst,” Journal of Photochemistry and Photobiology A: Chemistry, vol. 214, no. 1, pp. 1–9, 2010. [Online]. Available: http://www.sciencedirect.com/science/article/pii/S1010603010001826
[22] A. G. Rincón, C. Pulgarin, N. Adler, and P. Peringer, “Interaction between E. coli inactivation and DBP-precursors-dihydroxybenzene isomers in the photocatalytic process of drinking-water disinfection with TiO2,” Journal of Photochemistry and Photobiology A: Chemistry, vol. 139, no. 2–3, pp. 233–241, 2001. [Online]. Available: http://www.sciencedirect.com/science/article/pii/S1010603001003744
[23] J. J. Vélez-Colmenares, A. Acevedo, and E. Nebot, “Effect of recirculation and initial concentration of microorganisms on the disinfection kinetics of Escherichia coli,” Desalination, vol. 280, no. 1–3, pp. 20–26, 2011. [Online]. Available: http://www.sciencedirect.com/science/article/pii/S0011916411005698
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Publicado
mar 20, 2013
Article Details
Cómo citar
Velasco, E., Moreno, A. L., & Giraldo, S. A. (2013). Efecto de la presencia de sales inorgánicas sobre la inactivación fotocatalítica de E. Coli en agua. Ingeniería Y Ciencia, 9(17), 193–208. https://doi.org/10.17230/ingciecia.9.17.10
Número
Sección
Artículos
Agencias de apoyo
Vicerrectoría de Investigación y Extensión de la Universidad Industrial de Santander
Biografía del autor/a
Edwing Velasco, Universidad Industrial de Santander
Ingeniero Químico
Andrea L Moreno, Universidad Industrial de Santander
Magíster en Ingeniería QuímicaSonia A Giraldo, Universidad Industrial de Santander
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