US EPA

644084 

Journal Article 

Review 

Aggregation and deposition of engineered nanomaterials in aquatic environments: Role of physicochemical interactions 

Petosa, AR; Jaisi, DP; Quevedo, IR; Elimelech, M; Tufenkji, N 

2010 

1 

Environmental Science & Technology
ISSN: 0013-936X
EISSN: 1520-5851 

44 

17 

6532-6549 

English 

20687602 

10.1021/es100598h 

WOS:000281225800004 

The ever-increasing use of engineered nanomaterials will lead to heightened levels of these materials in the environment. The present review aims to provide a comprehensive overview of current knowledge regarding nanoparticle transport and aggregation in aquatic environments. Nanoparticle aggregation and deposition behavior will dictate particle transport potential and thus the environmental fate and potential ecotoxicological impacts of these materials. In this review, colloidal forces governing nanoparticle deposition and aggregation are outlined. Essential equations used to assess particle-particle and particle-surface interactions, along with Hamaker constants for specific nanoparticles and the attributes exclusive to nanoscale particle interactions, are described. Theoretical and experimental approaches for evaluating nanoparticle aggregation and deposition are presented, and the major findings of laboratory studies examining these processes are also summarized. Finally, we describe some of the challenges encountered when attempting to quantify the transport of nanoparticles in aquatic environments.