Assessment of trace metals during episodic events using DGT passive sampler: A proposal for water management enhancement

J.D. Villanueva 1, 2 Philippe Le Coustumer 1 Frédéric Huneau 3 Mikael Motelica-Heino 4 T. Perez 5 R. Materum 1 Ma. Victoria Espaldon 2 S. Stoll 6
1 ENSEGID - Géoressources & Environnement
2 University of the Philippines Los Baños
3 SPE - Sciences pour l'environnement
4 ISTO - Institut des Sciences de la Terre d'Orléans - UMR7327
5 Department of Environmental Science
6 Institute Forel
Abstract : The potential of the Diffusive Gradient Thin-Films (DGT) as a supplemental method for water quality monitoring was employed has been tested through 3 sampling campaigns to measure the trace metals (Cd, Co, Cr, Cu, Pb, Ni and Zn) present in the surface water of a highly urbanized river. Specifically, the study done in the Pasig River (Philippines) seeks to: assess the applicability of DGT passive sampler in an urban context exhibiting highly contrasted hydrological conditions (greatly influenced by episodic events) and sediment disturbance (dredging) and provide proposal for a better water management. The results indicate that: (1) DGT is highly recommended as part of a routine analysis for water quality monitoring; (2) DGT are able to capture the fluxes even in very contrasted flow regimes; (3) DGT are suitable to trace the labile fluxes of metals from the lake to the estuary; and (4) at the confluence of the Marikina River water management should be intensified. Moreover, recommendations were made for developing pertinent water monitoring protocol and management scheme.
Keywords : Philippines Pasig River DGT in-situ passive sampling surface water Trace metals
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J.D. Villanueva, Philippe Le Coustumer, Frédéric Huneau, Mikael Motelica-Heino, T. Perez, et al.. Assessment of trace metals during episodic events using DGT passive sampler: A proposal for water management enhancement. Water Resources Management, Springer Verlag, 2013, 27 (12), pp.4163-4181. ⟨10.1007/s11269-013-0401-5⟩. ⟨insu-00853458⟩

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