Santra Research Group

Environmental Nanotoxicology

Fate and Mobility of Nanomaterials in the Environment

Hidden crystalline CdS:Mn/ZnS toxic core within an amorphous silica shell

Nanotech products are projected to account for 15% of products manufactured globally by 2014 with a large economic impact totaling ~ USD 2.6 trillion. There is a strong need to understand the stability of commercial nanomaterials (CNMs) in the environment upon disposal at the end of their useful life. It is however extremely challenging to simulate physical and chemical properties of CNMs after release into the environment. CNMs vary in composition, structure/morphology and surface coating/chemistry and their state of dispersion. We are investigating fundamental interaction of core-shell (coated) CNMs with dissolved organic matter (DOM) such as humic acid. We are developing optical-based model nanoprobes for studying interaction of DOM components with CNMs in real-time at the molecular/nanoparticle level.

Funded by

  • Environmental Research and Education Foundation


  • Bolyard S.C., Reinhart D.R. and Santra S.. Behavior of Engineered Nanoparticles in Landfill Leachate. Environmental Science & Technology, 2013. DOI: 10.1021/es305175e (Published on the web).

Swadeshmukul Santra, Ph.D., University of Central Florida  •  Email:  •  Phone: 407-697-2848  •  Fax: 407-882-2819