RT info:eu-repo/semantics/article
T1 Influence of organic matter and CO2 supply on bioremediation of heavy metals by Chlorella vulgaris and Scenedesmus almeriensis in a multimetallic matrix
A1 Saavedra Concha, Ricardo
A1 Muñoz Torre, Raúl
A1 Taboada Meneses, María Elisa
A1 Bolado Rodríguez, Silvia
K1 Bioremediation
K1 Biorremediación
K1 Carbon dioxide
K1 Carbon dioxide
K1 Dióxido de carbono
K1 Heavy metals
K1 Metales pesados
K1 Microalgae
K1 Microalgas
K1 Organic matter
K1 Materia orgánica
K1 Toxicity
K1 Toxicidad
AB This research evaluated the influence of organic matter (OM) and CO2 addition on the bioremediation potential of two microalgae typically used for wastewater treatment: Chlorella vulgaris (CV) and Scenedesmus almeriensis (SA). The heavy metal (HM) removal efficiencies and biosorption capacities of both microalgae were determined in multimetallic solutions (As, B, Cu, Mn, and Zn) mimicking the highest pollutant conditions found in the Loa river (Northern Chile). The presence of OM decreased the total biosorption capacity, specially in As (from 2.2 to 0.0 mg/g for CV and from 2.3 to 1.7 mg/g for SA) and Cu (from 3.2 to 2.3 mg/g for CV and from 2.1 to 1.6 mg/g for SA), but its influence declined over time. CO2 addition decreased the total HM biosorption capacity for both microalgae species and inhibited CV growth. Finally, metal recovery using different eluents (HCl, NaOH, and CaCl2) was evaluated at two different concentrations. HCl 0.1 M provided the highest recovery efficiencies, which supported values over 85% of As, 92% of Cu, and ≈100% of Mn and Zn from SA. The presence of OM during the loaded stage resulted in a complete recovery of As, Cu, Mn, and Zn when using HCl 0.1 M as eluent.
PB Elsevier
SN 0147-6513
YR 2019
FD 2019
LK http://uvadoc.uva.es/handle/10324/37244
UL http://uvadoc.uva.es/handle/10324/37244
LA eng
NO Ecotoxicology and Environmental Safety, 2019, vol. 182
NO Producción Científica
DS UVaDOC
RD 26-abr-2024