12 research outputs found
Effect of silica nanoparticles on clay swelling and aqueous stability of nanoparticle dispersions
Characterization of nanoparticle transport through quartz and dolomite gravels by magnetic resonance imaging
Simultaneous removal of nano-ZnO and Zn2+ based on transportation character of nano-ZnO by coagulation: Enteromorpha polysaccharide compound polyaluminum chloride
Risk assessment of amorphous silicon dioxide nanoparticles in a glass cleaner formulation
Transport and aggregation of Al2O3 nanoparticles through saturated limestone under high ionic strength conditions: measurements and mechanisms
Environmental behaviour and ecotoxicity of engineered nanoparticles to algae, plants and fungi
15 páginas, 4 figuras, 1 tabla.-- From the issue entitled "Special issue on Ecotoxicology, Chemistry and Risk Assessment of Nanoparticles. Guest Editors: Richard Handy and Richard Owen".-- et al.Developments in nanotechnology are leading to a rapid proliferation of new materials that are likely to become a source of engineered nanoparticles (ENPs) to the environment, where their possible ecotoxicological impacts remain unknown. The surface properties of ENPs are of essential importance for their aggregation behavior, and thus for their mobility in aquatic and terrestrial systems and for their interactions with algae, plants and, fungi. Interactions of ENPs with natural organic matter have to be considered as well, as those will alter the ENPs aggregation behavior in surface waters or in soils. Cells of plants, algae, and fungi possess cell walls that constitute a primary site for interaction and a barrier for the entrance of ENPs. Mechanisms allowing ENPs to pass through cell walls and membranes are as yet poorly understood. Inside cells, ENPs might directly provoke alterations of membranes and other cell structures and molecules, as well as protective mechanisms. Indirect effects of ENPs depend on their chemical and physical properties and may include physical restraints (clogging effects), solubilization of toxic ENP compounds, or production of reactive oxygen species. Many questions regarding the bioavailability of ENPs, their uptake by algae, plants, and fungi and the toxicity mechanisms remain to be elucidated.Peer reviewe