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Studies from J.T.K. Quik and Co-Researchers Yield New Data on Environmental Water Research

February 14, 2014

By a News Reporter-Staff News Editor at Ecology, Environment & Conservation -- A new study on Environmental Water Research is now available. According to news reporting originating in Ijmuiden, Netherlands, by VerticalNews journalists, research stated, "Exposure modeling of engineered nanomaterials requires input parameters such as sedimentation rates and heteroaggregation rates. Here, we estimate these rates using quiescent settling experiments under environmentally relevant conditions."

The news reporters obtained a quote from the research, "We investigated 4 different nanomaterials (C-60, CeO2, SiO2-Ag and PVP-Ag) in 6 different water types ranging from a small stream to seawater. In the presence of natural colloids, sedimentation rates ranged from 0.0001 m d(-1) for SiO2-Ag to 0.14 m d(-1) for C-60. The apparent rates of heteroaggregation between nanomaterials and natural colloids were estimated using a novel method that separates heteroaggregation from homoaggregation using a simplified Smoluchowski-based aggregation-settling equation applied to data from unfiltered and filtered waters. The heteroaggregation rates ranged between 0.007 and 0.6 L mg(-1) day(-1), with the highest values observed in seawater."

According to the news reporters, the research concluded: "We argue that such system specific parameters are key to the development of dedicated water quality models for ENMs."

For more information on this research see: Heteroaggregation and sedimentation rates for nanomaterials in natural waters. Water Research, 2014;48():269-279. Water Research can be contacted at: Pergamon-Elsevier Science Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, England. (Elsevier -; Water Research -

Our news correspondents report that additional information may be obtained by contacting J.T.K. Quik, Wageningen IJR, IMARES Inst Marine Resources & Ecosyst Studies, NL-1976 CP Ijmuiden, Netherlands. Additional authors for this research include I. Velzeboer, M. Wouterse, A.A. Koelmans and D. van de Meent.

Keywords for this news article include: Europe, Ijmuiden, Netherlands, Environmental Water Research

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Source: Ecology, Environment & Conservation

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