Module 9: Nanomaterials in the Environment
Channel: METPHAST Program
Date: 25/05/2017

The objectives for this module are that, by the end, learners should be able to (1) identify sources for engineered nanomaterials in the natural environment, (2) describe potential ecological effects of nanomaterials, (3) predict pathways for exposure of the public to nanomaterials, and (4) assess human exposure to engineered nanomaterials in the environment.

Table of Contents: 

00:00 - Introduction
00:04 - Nanomaterials in the Environment
00:15 - Slide 3
00:37 - Exposures to Engineered Nanomaterials
01:29 - ENM Transformation Processes
03:28 - Release Scenarios for Nanocomposite CNTs
04:28 - Processes for CNTs in Nanocomposites
05:51 - CNT Nanocomposite with Weathering
07:21 - Potential for Release with Weathering
08:39 - Release Scenarios for Nano-Silver in Socks
10:07 - Processes for Nano-Silver in Socks
11:00 - Potential for Release with Washing
12:15 - Shifts in ENM Size Distributions
13:04 - Release Scenarios for Nano-TiO2
14:11 - Processes for Nano-TiO2
15:02 - TiO2 Downstream from a Swimming Area
16:30 - TiO2 in Runoff from Painted Surface
18:30 - Summary of Release Scenarios Studied
19:34 - ENM Fate and Transport
19:56 - ENM Fate and Transport
22:19 - Particle Transformation and Deposition
24:24 - Aggregation of ENMs in Aquatic Systems
25:51 - Aggregation Time Frames in Waters
26:58 - Sedimentation Time Frames in Waters
27:37 - Dissolution Time Frames in Waters
27:56 - Chemical Transformations in Water
28:58 - ENMs in the Natural Environment: Oceans
29:48 - Mechanisms of ENM Toxicity to Bacteria
30:57 - Effects of ENMs on Bacteria
32:01 - ENM Toxicity in Aquatic Systems
32:55 - ENMs in Soil
33:31 - Concerns Regarding ENMs in Soil
34:43 - Release Pathways
35:43 - Releases by Material and Product Area
36:25 - Releases by Material and Region
36:49 - Environmental Sampling Methods for ENMs
38:19 - Environmental ENM Analytical Goals
39:25 - Analytical Techniques
41:48 - ENM Concentrations in Surface Waters
43:03 - ENM Concentrations in WWTP Effluents
44:03 - ENM Concentrations in WWTP Biosolids
44:57 - ENM Concentrations in Sediments
45:22 - ENM Concentrations in Soils
46:00 - ENM Concentrations in Atmosphere
46:33 - Slide 45
47:21 - Slide 46