Journal
NANOIMPACT
Volume 5, Issue -, Pages 22-28Publisher
ELSEVIER
DOI: 10.1016/j.impact.2016.12.007
Keywords
Nanomaterials; Calcium phosphate; Water; Digestion
Funding
- US Environmental Protection Agency through the STAR program [RD83558001]
- National Science Foundation through the Nano-EnabledWater Treatment Technologies Nanosystems Engineering Research Center [EEC-1449500]
- CBET [1336542]
- Directorate For Engineering
- Div Of Chem, Bioeng, Env, & Transp Sys [1336542] Funding Source: National Science Foundation
Ask authors/readers for more resources
The unknowns surrounding presence, composition and transformations during the use phase of engineered nanoparticles (ENPs) in consumer products raises potential human and environmental health concerns and public discourse. This research developed evidence and confirmatory analytical methods to determine the presence and composition of ENPs in a consumer product with a complex organic matrix (six different infant formula samples). Nano-scale crystalline needle-shaped hydroxyapatite (HA; appx. 25 nmx 150 nm) primary particles, present as aggregates (0.3-2 mu m), were detected in half the samples. This is the first report of these ENPs in infant formula. Dissolution experiments with needle-shaped HA were conducted to assess potential transformations of nano-HA particles. Rapid dissolution of needle-shaped HA occurred only under lower pH conditions present in simulated biological fluids (acidic gastric fluids), but not in simulated drinking water (near-neutral pH). Other non-nanosized HA minerals exhibited less dissolution under the same low pH conditions. This work demonstrates the occurrence of engineered nanomaterials in the food supply of a sensitive population (infants) and the need to consider transformations in nanomaterials that occur during use, which result in different exposures between pristine/as-produced ENPs and nanomaterials after passing through the human gut. (C) 2017 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available