Effects of titanium dioxide nanoparticles derived from consumer products on the marine diatom Thalassiosira pseudonana.
Increased manufacture of TiO2nanoproducts has caused concern about the potential toxicity of these products to the environment and in public health. Identification and confirmation of the presence of TiO2nanoparticles derived from consumer products as opposed to industrial TiO2NPs warrant examination in exploring the significance of their release and resultant impacts on the environment. To this end, we examined the significance of the release of these particles and their toxic effect on the marine diatom algae Thalassiosira pseudonana. Our results indicate that nano-TiO2sunscreen and toothpaste exhibit more toxicity in comparison to industrial TiO2and inhibited the growth of the marine diatom T. pseudonana. This inhibition was proportional to the exposure time and concentrations of nano-TiO2. Our findings indicate a significant effect, and therefore, further research is warranted in evaluation and assessment of the toxicity of modified nano-TiO2derived from consumer products and their physicochemical properties.
Department of Civil, Architectural, and Environmental Engineering, University of Miami, 1251 Memorial Dr. McArthur Engineering Building, Coral Gables, FL, 33146-0630, USA.
Andrea
A
Galletti
Department of Civil, Architectural, and Environmental Engineering, University of Miami, 1251 Memorial Dr. McArthur Engineering Building, Coral Gables, FL, 33146-0630, USA.
Seokju
S
Seo
Department of Civil, Architectural, and Environmental Engineering, University of Miami, 1251 Memorial Dr. McArthur Engineering Building, Coral Gables, FL, 33146-0630, USA. s.joo1@miami.edu.
Sung Hee
SH
Joo
Ground Water and Ecosystems Restoration Division, National Risk Management, Research Laboratory, U.S. Environmental Protection Agency, 919 Kerr Research Drive, Ada, OK, 74820, USA.
Chunming
C
Su
Department of Marine Geosciences, University of Miami, 4600 Rickenbacker Causeway, Miami, FL, 33149-1098, USA.
Pat
P
Blackwelder
D017377:Diatoms / Q000187:drug effects* / Q000254:growth & development; D053768:Metal Nanoparticles / Q000633:toxicity*; D012623:Seawater / Q000382:microbiology; D013473:Sunscreening Agents; D014025:Titanium / Q000633:toxicity*; D014100:Toothpastes; D014874:Water Pollutants, Chemical / Q000633:toxicity*
D013473:Sunscreening Agents; D014100:Toothpastes; D014874:Water Pollutants, Chemical; C009495:titanium dioxide; D014025:Titanium
Algae; Commercial TiO2; Exposure; Marine environments; Nanoproducts; Toxicity