Environmental drivers of trace-metal bioavailability in an urban tropical lake, Lake Pampulha, Brazil

Viet Tran Khac (1, 2) , Brigitte Vinçon-Leite (2) , Talita Silva (1) , Bruno J. Lemaire (2) , Gilles Varrault (2) , Martin Seidl (2) , Nilo de Oliveira Nascimento (1)

1 UFMG - Universidade Federal de Minas Gerais [Belo Horizonte]
2 LEESU - laboratoire Eau Environnement et Systèmes Urbains

It is essential to assess the impact of urban runoff and associated pollutants on receiving waters. Few studies focused on trace metals in the water column of urban lakes. Moreover, the metal bioavailability is generally not considered. We present here the concentrations of trace metals frequently impacting urban water bodies and their bioavailability in the water column of an urban tropical reservoir. We evaluate with a statistical model, the Random Forest model, the role of environmental variables on metal concentrations and their bioavailability.

Mots clés: metal speciation; water column; bioavailability; random forest model

Domaines: Planète et Univers [physics]; Interfaces continentales, environnement; Planète et Univers [physics]; Sciences de la Terre; Hydrologie; Sciences de l'environnement

Viet Tran Khac, Brigitte Vinçon-Leite, Talita Silva, Bruno J. Lemaire, Gilles Varrault, et al.. Environmental drivers of trace-metal bioavailability in an urban tropical lake, Lake Pampulha, Brazil. 14th IWA/IAHR International Conference on Urban Drainage (ICUD), Sep 2017, Prague, Czech Republic. ⟨hal-01692213⟩