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9 results on '"Ijpelaar, G.F."'

2. Formation and removal of genotoxic activity during UV/H2O2-GAC treatment of drinking water

Author

Heringa, M.B., Harmsen, D.J.H., Beerendonk, E.F., Reus, A.A., Krul, C.A.M., Metz, D.H., Ijpelaar, G.F., and TNO Kwaliteit van Leven

Subjects
Biomedical Research, Photolysis, MSB - Microbiology and Systems Biology, Life, Oxidation, Drinking water, Genotoxicity, EELS - Earth, Environmental and Life Sciences, AOP, Nutrition, UV
Abstract

The objective of this study was to determine the genotoxic activity of water after UV/H2O2 oxidation and GAC filtration. Pre-treated surface water from three locations was treated with UV/H2O2 with medium pressure (MP) lamps and passed through granulated activated carbon (GAC). Samples taken before and after each treatment step were extracted and concentrated by solid phase extraction (SPE) and analyzed for genotoxicity using the Comet assay with HepG2 cells and the Ames II assay. The Comet assay showed no genotoxic response in any of the samples. In the Ames II, no genotoxic response was obtained with the TAMix (a mix of six strains), but the TA98 strain showed an increase in genotoxic activity after MP-UV/H2O2 for all three locations. GAC post treatment effectively reduced the activities to control levels at two of the three locations and to below the level of the pre-treated water at one site. The results indicate that UV/H2O2 treatment may lead to the formation of genotoxic by-products, which can be removed by subsequent GAC filtration. © 2010 Elsevier Ltd.

Published
2011

3. Wereldcongres UV-technologie in Amsterdam trekt 200 bezoekers

Author

Hofman-Caris, C.H.M., IJpelaar, G.F., Kruithof, J., Hofman-Caris, C.H.M., IJpelaar, G.F., and Kruithof, J.

Abstract

In Amsterdam vond eind september het vijfde wereldcongres plaats van de International Ultraviolet Association (IUVA), dat tevens het tienjarig bestaan markeerde. Ruim 200 deelnemers uit de hele wereld waren naar Amsterdam gekomen voor dit feestelijke congres.

Published
2009

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