Methods for characterization of colloid particles in rain water

Malyschew, A.; Schmidt, Harald; Weil, K. G.; Hoffmann, P.

doi:10.1016/1352-2310(94)90303-4

Cited by 7 publications

(1 citation statement)

References 11 publications

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“…The data in Fig. 1 indicate that even at a maximum Colloidal particles in rain (Malyschew et al 1994) surface potential of ∼ 0.025 V, nanomaterial suspensions with a Hamaker constant of 1E-20 J are likely to remain stable in all natural waters except for saline and brackish systems. Figure 2 depicts predicted CCC values as functions of both system temperature and Hamaker constant.…”

Section: Resultsmentioning

confidence: 94%

An Assessment of the Fate of Metal Oxide Nanomaterials in Porous Media

Loux

Savage

2008

Water Air Soil Pollut

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Developing procedures for assessing the potential environmental fate and transport of nanomaterials is an active endeavor of the environmental technical research community. Insufficient information exists for estimating the likelihood of nanomaterial deposition on natural surfaces in aquatic environments. This work develops a framework for estimating potential metal oxide nanomaterial selfaggregation through the combined application of recent developments in diffuse layer model surface complexation theory with historical Derjaguin-Landau-Verwey-Overbeek (DLVO) procedures. Findings from the work include: 1) the surface, diffuse layer, and/or zeta potentials of nanomaterials in environmental aqueous systems are likely to have an absolute value less than 25 mV, 2) only nanomaterials with a Hamaker constant as large as 1E-19 J (and an absolute surface potential < 25 mV) will likely aggregate in most environmental aquatic media, 3) natural organic matter coatings may render metal oxide nanomaterials less likely to aggregate in aquatic systems, 4) nanomaterials in aqueous suspension will likely have an absolute surface potential less than their micron-sized counterparts of the same composition, and 5) robust diffuse layer model databases of intrinsic surface site reactivity constants with multivalent aqueous environmental ions will need to be developed in order to provide accurate mechanistic estimates of the surface potential of nanoparticles suspended in aqueous environmental systems.

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Section: Resultsmentioning

confidence: 94%