Ryan, M. CathrynHutcheon, Ian E.Cole, Jennifer Margaret2005-08-192005-08-192004Cole, J. M. (2004). Arsenic in a village drinking water supply, Mexico (Master's thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca. doi:10.11575/PRISM/17320061297636Xhttp://hdl.handle.net/1880/42282Bibliography: p. 42-46Inhabitants of Tlamacazapa, Mexico display toxic health effects related to arsenic and other metal exposure from well-derived drinking water. Dissolved arsenic concentrations reach 37 ug/L, exceeding the World Health Organization guideline of 10 ug/L. Stable isotope data (2H & 18O-H2O, 13C in DIC, 34S-SO4) indicate that precipitation is recharging the wells through the soil and shallow groundwater. Soil and rock analyses exhibit arsenic concentrations up to 110 and 26 mg/kg, respectively. Major ion concentrations indicate that sewage contamination is entering well water by transport through the thin soil and shallow groundwater. Sewage contamination is a result of open-air excretion by humans and free-roaming animals. Arsenic and sewage contaminant concentrations correlate strongly and the presence of sewage apparently promotes the release of arsenic from aquifer materials. It is likely that arsenic mobilization is the result of competition with phosphate and other sewage-derived anions for sorption sites.viii, 52 leaves : ill. ; 30 cm.engUniversity of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.master thesis10.11575/PRISM/17320AC1 .T484 2004 C65A