Journal article
Chlorine and ozone disinfection of Encephalitozoon intestinalis spores
Water research (Oxford), v 39(11), pp 2369-2375
2005
PMID: 15921720
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Microsporidia are intracellular eukaryotic parasites which have the potential for zoonotic and environmental, including waterborne, transmission.
Encephalitozoon intestinalis is a microsporidian pathogen of humans and animals and has been detected in surface water. It is also on the Contaminant Candidate List of potential emerging waterborne pathogens for the US EPA. We performed disinfection studies using chlorine and ozone on
E. intestinalis spores with a cell-culture most-probable-number assay to determine infectivity. Chlorine experiments were performed at 5
°C at pH of 6, 7, and 8 with 1
mg/L initial chlorine concentrations, while ozone experiments were performed at 5
°C and pH 7 with initial ozone doses of 1 and 0.5
mg/L, both in buffered water. A derivation of Hom's model for disinfection kinetics under dynamic disinfectant concentrations was used to fit observed data and calculate concentration-time product (
C
*
t
) values. Chlorine
C
*
t
values varied with pH such that 99% (2-log
10)
C
*
t
ranged from 12.8 at pH 6 to 68.8 at pH 8 (mg
min/L). Ozone
C
*
t
values were approximately an order of magnitude less at 0.59–0.84
mg
min/L, depending on initial concentration.
Metrics
Details
- Title
- Chlorine and ozone disinfection of Encephalitozoon intestinalis spores
- Creators
- David E John - University of South Florida, College of Marine Science, 140 7th Avenue S., St. Petersburg, FL 33701, USACharles N Haas - Drexel University, Civil, Architectural and Environmental Engineering, Alumni Engineering Lab 270B, Philadelphia, PA 19104, USANena Nwachuku - Health and Ecological Criteria Division, OST, United States Environmental Protection Agency, Washington, DC 20460, USACharles P Gerba - University of Arizona, Department of Soil, Water and Environmental Science, 429 Shantz Building, Tucson, AZ 85721, USA
- Publication Details
- Water research (Oxford), v 39(11), pp 2369-2375
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Civil, Architectural, and Environmental Engineering
- Web of Science ID
- WOS:000230590800019
- Scopus ID
- 2-s2.0-20544440335
- Other Identifier
- 991014877944204721
UN Sustainable Development Goals (SDGs)
This publication has contributed to the advancement of the following goals:
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Engineering, Environmental
- Environmental Sciences
- Water Resources