The performance of passive flow monitors and phosphate accumulating passive samplers when exposed to pulses in external water flow rate and/or external phosphate concentrations

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Title The performance of passive flow monitors and phosphate accumulating passive samplers when exposed to pulses in external water flow rate and/or external phosphate concentrations
Author O'Brien, Dominique; Hawker, Darryl William; Shaw, Melanie; Mueller, Jochen F.
Journal Name Environmental Pollution
Year Published 2011
Place of publication United Kingdom
Publisher Elsevier Ltd
Abstract Passive samplers are typically calibrated under constant flow and concentration conditions. This study assessed whether concentration and/or flow pulses could be integrated using a phosphate passive sampler (P-sampler). Assessment involved three 21-day experiments featuring a pulse in flow rate, a pulse of filterable reactive phosphate (FRP) concentration and a simultaneous concentration and flow pulse. FRP concentrations were also determined by parallel grab sampling and the P-sampler calibrated with passive flow monitors (PFMs) and direct measurement of flow rates. The mass lost from the PFM over the deployment periods predicted water velocity to within 5.1, 0.48 and 7.1% when exposed to a flow rate pulse (7.5–50 cm s−1), concentration pulse (5–100 μg P L−1), or both simultaneously. For the P-sampler, good agreement was observed between the grab and passive measurements of FRP concentration when exposed to a pulse in flow (6% overestimation) or concentration (2% underestimation).
Peer Reviewed Yes
Published Yes
Alternative URI http://dx.doi.org/10.1016/j.envpol.2010.12.028
Volume 159
Issue Number 5
Page from 1435
Page to 1441
ISSN 0269-7491
Date Accessioned 2011-06-23
Language en_AU
Faculty Faculty of Science, Environment, Engineering and Technology
Subject Environmental Chemistry (incl Atmospheric Chemistry)
URI http://hdl.handle.net/10072/41049
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1

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