2017
DOI: 10.1002/etc.3700
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A method to account for the effect of hydrodynamics on polar organic compound uptake by passive samplers

Abstract: 9Mass transfer coefficients of the water boundary layer (kw) were measured using alabaster dissolution 10 kinetics in a diffusion cell that was operated at stirring rates between 90 and 600 min -1 , aiming to 11 provide a more robust characterisation of the effect of hydrodynamics on the uptake of polar 12 compounds by passive samplers, as compared with characterisations in terms of stirring rates and water 13 flow velocities. The measured kw helped to quantitatively understand calcium sulphate transport throu… Show more

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Cited by 41 publications
(45 citation statements)
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“…To further assess the likelihood of flow effects on R s , k w was measured by the alabaster plate dissolution method (Booij et al 2017), both inside and outside the canister (Figure 4). Valid k w measurements could be made at flow velocities between 8 and 27 cm/s, at temperatures between 7 and 21 °C.…”
Section: Resultsmentioning
confidence: 99%
See 1 more Smart Citation
“…To further assess the likelihood of flow effects on R s , k w was measured by the alabaster plate dissolution method (Booij et al 2017), both inside and outside the canister (Figure 4). Valid k w measurements could be made at flow velocities between 8 and 27 cm/s, at temperatures between 7 and 21 °C.…”
Section: Resultsmentioning
confidence: 99%
“…Valid k w measurements could be made at flow velocities between 8 and 27 cm/s, at temperatures between 7 and 21 °C. Values at U = 0 are shown for completeness, but are not valid because dissolution rates at low flow conditions are controlled by density currents that originate from the dissolution process itself (Booij et al 2017). The canister attenuated k w by a factor of 2.1 ± 0.5 (Figure 5).…”
Section: Resultsmentioning
confidence: 99%
“…According to the method reported by Booij et al [16], flow velocities were calculated from the measured mass transfer coefficients of the water boundary layer near the surface of the POCIS devices with alabaster plates. This is because the flow velocity measured by commercial equipment or calculated by volumetric pump output does not represent the exact value of the flow velocity near the POCIS surface.…”
Section: Flow Velocity Determinationmentioning
confidence: 99%
“…A third option is to apply a model that takes the mass transfer coefficient of the water boundary ( k w ) layer into account 1Rnormals=1Rs,max+1Aknormalw where R s,max is the limiting R s at infinite flow, and A is the sampler's surface area. Values of k w may be obtained by direct measurement or by applying a k w – U relationship (e.g., for mass transfer from a flat plate under laminar flow; Booij et al ).…”
Section: Introductionmentioning
confidence: 99%