Environmental Sciences Fair Project
Detecting the environmental dangers of nanomaterials

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Project Information
Title: Detecting the environmental dangers of nanomaterials
Subject: Environmental Sciences
Subcategory: Soil Piollution
Grade level: High School - Grades 9-12
Academic Level: Ordinary
Project Type: Experimental
Cost: Medium
Awards: Google Science Fair Finalist
Affiliation: Google Science Fair
Year: 2015
Materials and Equipment: Bean seeds, light microscope, colloidal nanogold, spectrophotometer, Fuchs-Rosenthal counting chamber, Tetrachloroauric acid, Trisodium citrate, Tannin acid, Sodium carbonate, Distilled water,
Techniques: FTIR (Fourier transform infrared spectroscopy)
Concepts: Nanoparticles
Description: The objective of this project is to examine, how nanoparticles (NPs) influence living organism around us. The first experiment examined the effects of colloidal nanogold on bean growth and ecological impacts. The soil was dehydrated and studied with FTIR (Fourier transform infrared spectroscopy) spectrophotometer. The second experiment examines how NPs affect freshwater flora. Different NPs concentrations are poured into algae cultures and observed after 24 hours. After the end of experiments samples are examined through a light microscope. Algae cells are counted in a Fuchs-Rosenthal counting chamber.
Link: www.googlesciencefair.com...

Environmental impact of nanotechnology

CC 3.0 - GNU 1.2
Groups opposing the installation of nanotechnology laboratories in Grenoble, France, have spraypainted their opposition on a former fortress above the city

The environmental impact of nanotechnology is the possible effects that the use of nanotechnological materials and devices will have on the environment. As nanotechnology is an emerging field, there is great debate regarding to what extent industrial and commercial use of nanomaterials will affect organisms and ecosystems.

Nanotechnology's environmental impact can be split into two aspects: the potential for nanotechnological innovations to help improve the environment, and the possibly novel type of pollution that nanotechnological materials might cause if released into the environment.

Nanopollution is a generic name for waste generated by nanodevices or during the nanomaterials manufacturing process. Ecotoxicological impacts of nanoparticles and the potential for bioaccumulation in plants and microorganisms is a subject of current research, as nanoparticles are considered to present novel environmental impacts. Of the US$710 million spent in 2002 by the U.S. government on nanotechnology research, $500,000 was spent on environmental impact assessments.

To properly assess the health hazards of engineered nanoparticles the whole life cycle of these particles needs to be evaluated, including their fabrication, storage and distribution, application and potential abuse, and disposal. The impact on humans or the environment may vary at different stages of the life cycle.

Nanoremediation is the use of nanoparticles for environmental remediation. Nanoremediation has been most widely used for groundwater treatment, with additional extensive research in wastewater treatment. Nanoremediation has also been tested for soil and sediment cleanup. Even more preliminary research is exploring the use of nanoparticles to remove toxic materials from gases.

Nanofiltration is a relatively recent membrane filtration process used most often with low total dissolved solids water such as surface water and fresh groundwater, with the purpose of softening (polyvalent cation removal) and removal of disinfection by-product precursors such as natural organic matter and synthetic organic matter. Nanofiltration is also becoming more widely used in food processing applications such as dairy, for simultaneous concentration and partial (monovalent ion) demineralisation.

Research is underway to use nanomaterials for purposes including more efficient solar cells, practical fuel cells, and environmentally friendly batteries. The most advanced nanotechnology projects related to energy are: storage, conversion, manufacturing improvements by reducing materials and process rates, energy saving (by better thermal insulation for example), and enhanced renewable energy sources.

Green nanotechnology refers to the use of nanotechnology to enhance the environmental sustainability of processes producing negative externalities. It also refers to the use of the products of nanotechnology to enhance sustainability. It includes making green nano-products and using nano-products in support of sustainability.

See also:
Environmental Impact of Nanotechnology
Green Nanotechnology
Health Impact of Nanotechnology

Source: Wikipedia (All text is available under the terms of the Creative Commons Attribution-ShareAlike License)

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