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A low-tech, low-cost passive sampler for the long-term monitoring of phosphate loads in rivers and streams

Müller, Beat and Stierli, Ruth and Gächter, René. (2008) A low-tech, low-cost passive sampler for the long-term monitoring of phosphate loads in rivers and streams. Journal of environmental monitoring, Vol. 10. pp. 817-820.

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Official URL: http://edoc.unibas.ch/dok/A6006332

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Abstract

The concentration of dissolved reactive phosphorus (DRP) in rivers can change intermittently within minutes depending on the weather and water discharge (Q), or activities in the watershed. Accordingly, accurate estimation of the annual DRP load requires frequent sampling or even continuous monitoring, which is laborious and cost-intensive. We present the design and laboratory evaluation of a new, robust, low-cost, low-tech device based on passive samplers (P-traps). The traps use Fe-(oxy)hydroxide coated quartz sand as an adsorbent enclosed in a vertical grid of individual cells separated from the river water by filter membranes. They are inexpensive, easy to handle, resistant to repeated desiccation and immersion and exposable for several months. They permit estimation of discharge dependent time weighted average DRP concentrations (C-Q relationships) and annual P loads of rivers characterized by highly variable DRP concentrations with a relative accuracy of +/- 3%.
Faculties and Departments:03 Faculty of Medicine > Bereich Medizinische Fächer (Klinik) > Allgemeine innere Medizin AG > Argovia Professur für Medizin (Müller)
03 Faculty of Medicine > Departement Klinische Forschung > Bereich Medizinische Fächer (Klinik) > Allgemeine innere Medizin AG > Argovia Professur für Medizin (Müller)
UniBasel Contributors:Müller, Beat
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:Royal Society of Chemistry
ISSN:1464-0325
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:07 Dec 2012 13:04
Deposited On:07 Dec 2012 13:03

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