CHAPTER 14. Potential Risk of Nanotechnology. Azmi Bin Hassan Mohd Nazih Bin Jaafar Mohd Farid Bin Saiman Mohd ‘ Azzim Bin Nordin Mohd Faiz Bin Mohd Fuad Mohd Fikri Bin Omar Mohd Azamudin Bin Abdul Aziz. GROUP MEMBERS. AGENDA. Introduction. Nanotechnology
Potential Risk of Nanotechnology.
uptake by the human
body and nanotoxicity
1. Respiratory System
3 WAYS NANOMATERIALS UPTAKE BY HUMAN BODY
Exposure through respiratory system
Exposure through skin
Exposure through Ingestion
TOXICITY OF NANOSTRUCTURED
a. Metallic nanoparticles
b. Quantum dot.
d. Carbon nanotubes
Table 1: Cytotoxicity of fullerene-based nanostructured materials.
Toxicity of nanostructured
materials to environment
APPROACHES FOR INCREASINGBIOCOMPATIBILITY AND REDUCINGNANOTOXICITY OF NANOSTRUCTUREDMATERIALS
What is nanotoxicology
WHAT ARE THE POTENTIAL ENVIRONMENTAL EFFECTS OF NANOMATERIALS?
How to work safely with nanomaterials?
Based on particle physics and studies of fine atmospheric pollutants, the nanoparticle size range is the range of minimum settling. This means that once released into air, nanoparticles will remain airborne for considerable periods of time. Nanoparticles can be inhaled and will be collected in all regions of the respiratory tract; about 35% will deposit in the deep region of the lungs.
Because they are so small, nanoparticles follow airstreams more easily than larger particles, so they will be easily collected and retained in standard ventilated enclosures such as fume hoods. In addition, nanoparticles are readily collected by HEPA filters. Respirators with HEPA filters will be adequate protection for nanoparticles in case of spills of large amounts of material.