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Disinfection of drinking water contaminated with Cryptosporidium parvum oocysts under natural sunlight and using the photocatalyst TiO2.
J Photochem Photobiol B. 2007 Sep 25; 88(2-3):105-11.JP

Abstract

The results of a batch-process solar disinfection (SODIS) and solar photocatalytic disinfection (SPCDIS) on drinking water contaminated with Cryptosporidium are reported. Cryptosporidium parvum oocyst suspensions were exposed to natural sunlight in Southern Spain and the oocyst viability was evaluated using two vital dyes [4',6-diamidino-2-phenylindole (DAPI) and propidium iodide (PI)]. SODIS exposures (strong sunlight) of 8 and 12h reduced oocyst viability from 98% (+/-1.3%) to 11.7% (+/-0.9%) and 0.3% (+/-0.33%), respectively. SODIS reactors fitted with flexible plastic inserts coated with TiO2 powder (SPCDIS) were found to be more effective than those which were not. After 8 and 16 h of overcast and cloudy solar irradiance conditions, SPCDIS reduced oocyst viability from 98.3% (+/-0.3%) to 37.7% (+/-2.6%) and 11.7% (+/-0.7%), respectively, versus to that achieved using SODIS of 81.3% (+/-1.6%) and 36.0% (+/-1.0%), respectively. These results confirm that solar disinfection of drinking water can be an effective household intervention against Cryptosporidium contamination.

Authors+Show Affiliations

Department of Microbiology and Parasitology, Faculty of Pharmacy, University of Santiago de Compostela, Santiago de Compostela, Spain.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

17624798

Citation

Méndez-Hermida, Fernando, et al. "Disinfection of Drinking Water Contaminated With Cryptosporidium Parvum Oocysts Under Natural Sunlight and Using the Photocatalyst TiO2." Journal of Photochemistry and Photobiology. B, Biology, vol. 88, no. 2-3, 2007, pp. 105-11.
Méndez-Hermida F, Ares-Mazás E, McGuigan KG, et al. Disinfection of drinking water contaminated with Cryptosporidium parvum oocysts under natural sunlight and using the photocatalyst TiO2. J Photochem Photobiol B, Biol. 2007;88(2-3):105-11.
Méndez-Hermida, F., Ares-Mazás, E., McGuigan, K. G., Boyle, M., Sichel, C., & Fernández-Ibáñez, P. (2007). Disinfection of drinking water contaminated with Cryptosporidium parvum oocysts under natural sunlight and using the photocatalyst TiO2. Journal of Photochemistry and Photobiology. B, Biology, 88(2-3), 105-11.
Méndez-Hermida F, et al. Disinfection of Drinking Water Contaminated With Cryptosporidium Parvum Oocysts Under Natural Sunlight and Using the Photocatalyst TiO2. J Photochem Photobiol B, Biol. 2007 Sep 25;88(2-3):105-11. PubMed PMID: 17624798.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Disinfection of drinking water contaminated with Cryptosporidium parvum oocysts under natural sunlight and using the photocatalyst TiO2. AU - Méndez-Hermida,Fernando, AU - Ares-Mazás,Elvira, AU - McGuigan,Kevin G, AU - Boyle,Maria, AU - Sichel,Cosima, AU - Fernández-Ibáñez,Pilar, Y1 - 2007/05/29/ PY - 2007/03/13/received PY - 2007/05/14/revised PY - 2007/05/15/accepted PY - 2007/7/13/pubmed PY - 2007/12/12/medline PY - 2007/7/13/entrez SP - 105 EP - 11 JF - Journal of photochemistry and photobiology. B, Biology JO - J. Photochem. Photobiol. B, Biol. VL - 88 IS - 2-3 N2 - The results of a batch-process solar disinfection (SODIS) and solar photocatalytic disinfection (SPCDIS) on drinking water contaminated with Cryptosporidium are reported. Cryptosporidium parvum oocyst suspensions were exposed to natural sunlight in Southern Spain and the oocyst viability was evaluated using two vital dyes [4',6-diamidino-2-phenylindole (DAPI) and propidium iodide (PI)]. SODIS exposures (strong sunlight) of 8 and 12h reduced oocyst viability from 98% (+/-1.3%) to 11.7% (+/-0.9%) and 0.3% (+/-0.33%), respectively. SODIS reactors fitted with flexible plastic inserts coated with TiO2 powder (SPCDIS) were found to be more effective than those which were not. After 8 and 16 h of overcast and cloudy solar irradiance conditions, SPCDIS reduced oocyst viability from 98.3% (+/-0.3%) to 37.7% (+/-2.6%) and 11.7% (+/-0.7%), respectively, versus to that achieved using SODIS of 81.3% (+/-1.6%) and 36.0% (+/-1.0%), respectively. These results confirm that solar disinfection of drinking water can be an effective household intervention against Cryptosporidium contamination. SN - 1011-1344 UR - https://www.unboundmedicine.com/medline/citation/17624798/Disinfection_of_drinking_water_contaminated_with_Cryptosporidium_parvum_oocysts_under_natural_sunlight_and_using_the_photocatalyst_TiO2_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S1011-1344(07)00073-5 DB - PRIME DP - Unbound Medicine ER -