Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Accueil du site → Doctorat → États-Unis → 2011 → Emerging contaminants in ecosystems : new challenges for water reuse implementation and mechanisms of perfluorochemical bioaccumulation

Stanford University (2011)

Emerging contaminants in ecosystems : new challenges for water reuse implementation and mechanisms of perfluorochemical bioaccumulation

Bischel, Heather Nicole

Titre : Emerging contaminants in ecosystems : new challenges for water reuse implementation and mechanisms of perfluorochemical bioaccumulation

Auteur : Bischel, Heather Nicole

Université de soutenance : Stanford University

Grade : PhD, Civil and Environmental Engineering, 2011

Résumé
Technological innovations developed in response to pressing water supply needs in populated arid regions have led to the recovery of municipal wastewater for beneficial reuse worldwide. Yet even as rapid urbanization and severe droughts motivate wastewater reuse, new engineering and policy hurdles arise over public concerns and management challenges regarding the persistence of residual and byproduct pharmaceutical and industrial chemicals in treated municipal effluent. Bioaccumulation of synthetic organic chemicals in environments downstream of wastewater effluent discharge and recycled water use poses an ecological risk and introduces a potential pathway of human exposure to these contaminants. This dissertation assesses management challenges for water reuse implementation in Northern California ; identifies opportunities of water reuse for ecosystem enhancement ; explores the bioaccumulation of one class of persistent and toxic unregulated chemical contaminants, perfluoroalkyl acids (PFAAs) ; and evaluates mechanisms of bioaccumulation via an in-depth study of PFAA interactions with a model serum protein. This study provides context for issues surrounding chemicals of emerging concern (CECs) in recycled water. However, uncertainty regarding bioaccumulation of CECs from recycled water used for ecological enhancement or habitat creation remains a concern. Investigation of mechanisms influencing PFAA bioaccumulation provides insight into one class of CECs now detected in sensitive aquatic ecosystems and contributes to ongoing efforts to characterize the physiochemical properties of compounds used to replace long-chain perfluorinated chemicals

Présentation

Version intégrale (7,5 Mb)

Page publiée le 18 juin 2013, mise à jour le 27 décembre 2018