The potential intrinsic and extrinsic toxicity of silica nanoparticles and its impact on marine organisms
Zhang, Hua, Leung, Yolanda, Louden, Daniel, de Nys, Rocky, and Lamb, Robert (2008) The potential intrinsic and extrinsic toxicity of silica nanoparticles and its impact on marine organisms. NANO, 3 (4). pp. 271-278.
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The intrinsic and extrinsic toxicity of SiO2 nanoparticles (Aerosil OX50, ϕ ~ 40 nm) are investigated with a comparison to the particles in micron size (SiO2 gel, ϕ ~ 1.5 μ m). Nanoparticles potentially functioned as a carrier of harmful substances transfer was assessed by examining the surface adsorption behavior of the nanoparticles towards γ-picoline (4-methylpyridine), recognized as one type of the marine pollutants, as well as the penetration behavior of the nanoparticles towards a typical marine macro-organism (Caulerpa taxifolia). Silica nanoparticle surface can take up to 2.6 molecules/nm2 of γ-picoline in an aqueous solution comparable to the marine environment. These nanoparticles can further travel onto the surface and into the bulk of the algae (Caulerpa taxifolia) with a depth of ~ 1 μm while carrying toxic γ-picoline. The integrated intrinsic and extrinsic toxicity of SiO2 nanoparticles has a significant effect on the growth of the algae. The large surface area of the silica nanoparticles results in a high adsorption capability and allows the particles to participate in possible toxic carrier activities in water medium towards marine organisms.
|Item Type:||Article (Refereed Research - C1)|
|Keywords:||Marine sciences; silica nonparticles; toxicity; γ-picoline; marine organism; algae|
|FoR Codes:||10 TECHNOLOGY > 1007 Nanotechnology > 100799 Nanotechnology not elsewhere classified @ 50%|
06 BIOLOGICAL SCIENCES > 0607 Plant Biology > 060701 Phycology (incl Marine Grasses) @ 50%
|SEO Codes:||86 MANUFACTURING > 8698 Environmentally Sustainable Manufacturing > 869899 Environmentally Sustainable Manufacturing not elsewhere classified @ 100%|
|Deposited On:||22 Mar 2010 14:17|
|Last Modified:||18 Oct 2013 00:52|
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