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Environmental risks of silver nanoparticles in attached-growth biological wastewater treatment processes: toxicity, persistence and impacts on effluent quality

Sanaz Alizadeh

PhD thesis (2019)

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Cite this document: Alizadeh, S. (2019). Environmental risks of silver nanoparticles in attached-growth biological wastewater treatment processes: toxicity, persistence and impacts on effluent quality (PhD thesis, Polytechnique Montréal). Retrieved from https://publications.polymtl.ca/4015/
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Abstract

«RÉSMÉ: Grâce à leur grande activité antimicrobienne, les nanoparticules d’argent (AgNP) sont les nanoparticules métalliques les plus utilisées de nos jours. Elles sont utilisées dans nombre de secteurs, dont le domaine de la santé, les cosmétiques, les traitements de l'eau et l'industrie alimentaire. Les propriétés « nanospécifiques » de ces nanoparticules pourraient toutefois présenter certains risques écotoxicologiques lors de leur dissémination dans l’environnement. Étant donné leur activité antimicrobienne, les conséquences biologiques que peuvent avoir les AgNP et leur effet inhibiteur potentiel sur les communautés microbiennes présentes dans les procédés biologiques de traitement des eaux usées présentent une préoccupation économique et environnementale.» et «----------ABSTRACT: Due to their broad-spectrum antimicrobial activities, silver nanoparticles (AgNPs) are the most widely used metal nanoparticles today. They are used in various sectors including health, cosmetics, water treatment and food industry. The ‘nano-specific’ properties of these nanoparticles, however, can lead to eco-toxicological problems when released into the environment. Given the antimicrobial activity of AgNPs, their biological implications and potential inhibitory effects on the microbial communities of biological wastewater treatment processes have become a significant economic and environmental concern. Much effort has been made to study the effects of AgNPs on biological wastewater treatment, but controversy still exists. AgNPs are observed to negatively affect the biological performance and microbial communities in suspended-growth biological wastewater processes at high AgNP doses (>1 mg/L). Yet, the interaction and adverse impact of AgNPs in attached growth process systems are poorly understood.»

Open Access document in PolyPublie
Department: Département des génies civil, géologique et des mines
Dissertation/thesis director: Yves Comeau and Subhasis Ghoshat
Date Deposited: 18 Nov 2019 13:48
Last Modified: 27 Nov 2019 16:41
PolyPublie URL: https://publications.polymtl.ca/4015/

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