Environmental Health & Safety of Nanomaterials – Page 17

12 Billion Dollars Annually Expended on Throw away Filters- There is a new technology alternative to this wasteful practice

Bromley D., Enprotec, CA

In a world that is focussed at finding methods to use less energy or alternatives to existing energy driven products, one obvious change that is essential is the reduced use of disposable products. Specifically this [...]

Effect of surfactant on TiO2/UV mediated heterogeneous photocatalytic degradation of DDT in contaminated water

Sinha S., Tapia-Orozco N.G., Acosta-Ramírez D.S., Rodríguez-Vázquez R., CINVESTAV, MX

The toxic effects from the use of pesticides are of great concern to the environment. The pesticides containers are not treated according to the Mexican normativity and hence increase the pollutant levels in the environment, [...]

A Sonoelectrochemical Synthesis of Nanosized CdS on TiO2 Nanotube-Array for Enhancing Photoelectrochemical Reactivity

Wang C-L, Sun L., Yun H., Li J., Lin C.J., Lai Y.K., Lin C.J., Xiamen University, CN

The nanoparticles of CdS were precipitated onto a self-organized TiO2 nanotube array photo-electrodes by using sonochemical synthesis combining with constant current electrochemical deposition. It is indicated that the CdS nanoparticles with average diameter of 28.1 [...]

Use of different natural Extracts from Tropical plants as Green Inhibitors for Metals

Bogaerts W., Vuthi T., Phong P.H., Hanh P.H., Linh D.C., Addul R., University of Leuven, BE

The authors present an overview of the work & results obtained in the framework of a bilateral cooperation program between Belgium and Vietnam to discover new environmentally-friendly corrosion inhibitors or ‘harmless corrosion inhibitors to nature” [...]

Degradation of Phenol in Waste Water Using Alcohol-Free Enzyme Encapsulated Silica Aerogel

Sani S., Lee S.L., Mohd Muhid M.N., Hamdan H., Universiti Teknologi Malaysia, MY

Encapsulation of enzyme tyrosinase into nano-porous silica aerogel via an alcohol-free colloidal sol-gel route using rice husk ash (RHA) as silica source was studied. Tyrosinase encapsulated silica aerogel (TESA) was synthesized with and without solvent [...]

Removal of Heavy Metals From Aqueous Solutions with Calcium Alginate Beads

Luna-Pineda T., Román-Velázquez F., University Of Puerto Rico at Mayaguez, PR

The present research is focused on the development of a bio-sorbent based on alginate beads. The alginate is a natural polymer extracted from brown seaweed with capability of hosting divalent cations in gel state, which [...]

A Nanotechnology Policy Framework for California

Wise A., Woodruff T., University of California-San Francisco, US

We are in the process of writing a nanotechnology framework policy recommendation for the state of California. It will be the first report of its kind to incorporate scientific analysis with regulatory recommendations. It will [...]

Size Matters: The outer diameter of multiwalled carbon nanotubes (MWCNTs) affects gene expression in female fathead minnows (Pimephales promelas)

Carter B.J., Griffitt R.J., Brown-Peterson N., Hammers H.R., Barber D.S., EcoArray, Inc., US

We used oligonucleotide microarrays to examine the gene expression patterns in female fathead minnows (Pimephales promelas) exposed to two different sizes (<8 nm and 50-80 nm outer diameter) and three concentrations (0.1 mg/L, 0.3 mg/L, [...]

Cytotoxicity and genotoxicity of silver nanomaterials

Uyguy B., Mason M.D., Ng A-K., University of Southern Maine, US

Summary We have investigated the cytotoxic effect of dialyzed silver nanoparticles (Ag NPs), PEGylated Ag NPs and silver nanorods on human cultured cells. The cytotoxicity of 24 h treatment with Ag NPs at 0.25, 0.5, [...]

Gold nanoparticles caused learning impairment in mice

Chen Y-S, Hung Y.-C., Liau I., Lin L.-W., Hong M.-Y., Huang G.S., National Chiao Tung University, TW

Aims : To investigate the toxic effect of gold nanoparticles (GNP) to the learning and memory of mice. Key findings: Both 17 nm and 37 nm GNPs induced severe sickness in mice. However, only 17 [...]