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Utah State University (2003)

Examination of an ultraviolet treatment system for removal of nitrate from potable water

Teton, Elese Dallas

Titre : Examination of an ultraviolet treatment system for removal of nitrate from potable water

Auteur : Teton, Elese Dallas

Université de soutenance  : Utah State University

Grade  : Master of Science (MS) 2003

Résumé
Nitrate contamination of drinking water is a serious water quality problem for some Native American communities. In this project, nitrate levels in tribal water systems in New Mexico and Arizona were surveyed. Some wells contained excessive levels (48 mg/L-N) of nitrate. High levels of chloride and dissolved minerals were also prevalent. The feasibility of reducing nitrate levels using ultraviolet irradiation coupled with air stripping was tested. Reaction kinetics and the effects of temperature and pH on nitrate reduction were quantified. The highest nitrate removal was associated with UV irradiation at ambient pH, followed by acid addition and aeration. However, the UV lamp was susceptible to excessive scaling from the minerals in the water, rendering the process impractical. Additional research is needed to develop cost-effective, practical, and efficient treatment systems to remove nitrate and protect public health, particularly for use in shallow groundwater systems that serve Native American communities.

Mots clés : Sanitation, Applied sciences, Environmental engineering

Accès au document : Proquest Dissertations & Theses

Page publiée le 28 mars 2015, mise à jour le 12 septembre 2018