Iron oxide xerogels for improved water quality monitoring of arsenic(iii) in resource-limited environmentsviasolid-phase extraction, preservation, storage, transportation, and analysis of trace contaminants (SEPSTAT)

Abstract

We show that iron oxide xerogels can quantitatively adsorb, store, and release aqueous arsenic(iii), enabling a new arsenic monitoring paradigm where sample contamination is adsorbed onto solid sorbents for transportation to laboratories for analysis.

Optimizing the performance of As(III) and As(V) adsorption process on magnetic carbon xerogel nanocomposites from aqueous solution and natural groundwater wells

“…Regard to the physical-chemical characterization of the real water, this natural groundwater contains nonmetallic and heavy metals (F − , Fe and Mn) and abundant anion ions such as Cl − , but the presence of these ions did not signi cantly affect the performance of arsenic removal. It can be explained that the presence of interfering ions of groundwater replace in the adsorption process of arsenic, but in the case of lower solution pH, showing a higher selectivity for adsorbing arsenic and a higher number of sites (Bono et al 2021).…”

“…The adsorption of aqueous solution by the use of RF gels has been investigated in the removal of heavy metal ions (Ni 2+ , Cu 2+ and Zn 2+ ) using carbon aerogels and xerogels (Luzny et al 2014), Fe 3+ and Cu 2+ ions using magnetic organic xerogels (Strachowski et al 2018) and As, Fe and Mn ions using nanocarbon hybrid of carbon xerogel (Embaby et al 2021). Moreover, iron oxide xerogels were prepared for improving water quality monitoring of arsenic(III) from groundwater samples (Bono et al 2021).…”

“…Due to the properties of mesoporous gels such as texture and structure, mechanical performance, chemical stability, and possibility of control by design according to the conditions of the synthesis, they are attractive to investigate and use for speci c application (Al-Muhtaseb and Ritter 2003). A speci c application of resorcinol formaldehyde (RF) gel is found in the removal of contaminants from drinking water and wastewater (Haro et al 2011;Vivo-Vilches et al 2018;Huang et al 2018;Bono et al 2021;Hristea et al 2021). The adsorption of aqueous solution by the use of RF gels has been investigated in the removal of heavy metal ions (Ni 2+ , Cu 2+ and Zn 2+ ) using carbon aerogels and xerogels (Luzny et al 2014), Fe 3+ and Cu 2+ ions using magnetic organic xerogels (Strachowski et al 2018) and As, Fe and Mn ions using nanocarbon hybrid of carbon xerogel (Embaby et al 2021).…”

“…higher the adsorption capacity of As(III) and As(V)(Bono et al 2021). The mesoporous matrix of resorcinol-formaldehyde carbon xerogel provide the hierarchical pathways for the adsorbate molecules like arsenic in the adsorption process and the surface modi cation of these adsorbents improved and enhanced the adsorption capacity(Faizal and Zaini 2019).…”