abstract

• The presence of heavy metals such as arsenic (As) and chromium (Cr) can be considered one of the most toxic heavy metals. This study aims to develop and evaluate a graphene oxide (GO) based material functionalized with ferrihydrite for the removal of As(V) in the presence of Cr(VI). The adsorbent ferrihydrite-functionalized graphene oxide (GOFH) was characterized by SEM, FTIR, XRD, XPS, surface charge, BET and TGA. Individual adsorption capacities for As(V) and Cr(VI) were 160 and 66 mg g−1 respectively at pH 4 and 298 K, fitting the Langmuir model. In binary systems, GOFH adsorbed As(V) with an adsorption capacity of 137 mg g−1 in the presence of 20 mg L−1 Cr(VI) at room temperature. Thermodynamic analysis revealed an exothermic and spontaneous process. Additionally, GOFH effectively removed several coexisting anions from groundwater, including SO42−, CO32− and Cl−. This work evidences the potential of GOFH for competitive adsorption of priority pollutants from complex matrices. The GOFH material represents a technically and economically viable technology for application in groundwater decontamination, as it requires inexpensive precursors and ambient conditions during synthesis and operation.

authors

• Corona Rivera Miguel Ángel
• Saldaña-Robles A.

publication date

• 2024-01-01

funding provided via

• CONAHCyT, (1252574, 825526); National Council of Humanities, Science and Technology; Universidad de Guanajuato, UG  Grant

published in

• Emerging Contaminants  Journal

keywords

• Adsorption capacity; Competition; Contamination; Groundwater; Ions

Digital Object Identifier (DOI)

• 10.1016/j.emcon.2024.100312

PubMed ID

start page

end page

volume

• 10

issue

• 3