Author(s): Salazar, H. ; Martins, P. M. ; Batista, Daniela Miranda ; Shejale, K. P. ; Sharma, R. K. ; Krishnapriya, R. ; Ferdov, S. ; Botelho, Gabriela ; Fidalgo-Marijua, A. ; Cássio, Fernanda ; Lanceros-Méndez, S.
Date: 2022
Persistent ID: https://hdl.handle.net/1822/82048
Origin: RepositóriUM - Universidade do Minho
Subject(s): Adsorption; Arsenic; Ecotoxicity; Heavy-metals; Nanomaterials; Water remediation
The application of nanomaterials to remove arsenic (As) from the water represents one of the 21 most promising remediation methods nowadays. In this study, three active materials, including 22 Y2(CO3)3), ZnO/TiO2, and Fe3O4, with different structural and morphological properties, were 23 evaluated for their As(V) adsorption capacity in contaminated water. Thus, the adsorption 24 behaviour was evaluated, including the influence of pH, absorption kinetics, and isotherms. 25 This work demonstrates that the active materials show a high adsorption performance, with 26 adsorption efficiencies always close to 100%, leading to maximum adsorption capacities of 27 32.8, 37.3, and 35.8 mg/g for Y2(CO3)3), ZnO/TiO2, and Fe3O4, respectively. The effects of 28 these suspended sorbent nanomaterials on Daphnia magna allowed us to estimate the lethal concentration that kills 50% of the test specimens (LC50) of 6.57x10 29 3 mg/L, 28.7 mg/L, and1.91x10 30 6 mg/L, for Fe3O4, ZnO/TiO2 and Y2(CO3)3, respectively. Overall, it is confirmed the 31 suitability of the investigated materials for arsenic water remediation applications.
