Deactivation of helminth eggs using solar-driven advanced oxidation processes coupled with free chlorine

ENVR 135

Liliana González, erick.bandala@udlap.mx1, Juan L. García2, Benito Corona Vasquez, benito.corona@udlap.mx1, and Erick R. Bandala, erick.bandala@udlap.mx1. (1) Departamento de Ingeniería Civil y Ambiental, Universidad de Las Americas-Puebla, Edificio IA Oficina 221, Sta. Catarina Mártir, Cholula 72820 Puebla, Mexico, (2) Instituto Mexicano de Tecnología del Agua, Jiutepec, Morelos 62550, Mexico
Occurrence and control of waterborne pathogens remain major concerns for water treatment in developing countries. The lack of access to safe drinking water as well as insufficient sanitation infrastructure are common to rural areas in Mexico where waterborne parasitic illnesses are among the main causes of death. Solar-driven photo-Fenton process, coupled with subsequent free chlorine application, is proposed to control the occurrence of helminth eggs in raw wastewater used for crop irrigation. Three different concentrations of ferrous ion (0, 5 and 10 mM) and hydrogen peroxide (0, 140 and 280 mM) as well as six different CT values for free chlorine (0, 70, 140, 280, 350 and 560 mg-min/L) were tested against the eggs under controlled conditions of pH and temperature. Preliminary results suggest that the proposed approach could be an efficient and economic alternative to control the occurrence of recalcitrant waterborne pathogens in Mexico and Latin America.
 

Advances in Drinking Water Disinfection and Disinfection Byproduct Management
1:30 PM-5:10 PM, Tuesday, April 8, 2008 Morial Convention Center -- Rm. 236, Oral

Division of Environmental Chemistry

The 235th ACS National Meeting, New Orleans, LA, April 6-10, 2008