Removal and Oxidation of As(III) from Water Using Iron Oxide Coated CTAB as Adsorbent

Abstract

Iron oxides such as magnetite and maghemite coated with cetyltrimethylammonium bromide (CTAB) are very promising materials for wastewater treatment because iron oxide can be easily separated from solutions using the magnetic separation procedure Iron oxide (IO) coated CTAB was synthesized by an adapted co-precipitation method. In the present study, the IO-CTAB was used for removing arsenic from water for the first time. In the present study, the performance of iron oxide coated CTAB biocomposites as an adsorbent for arsenic removal from aqueous solutions was examined. X-ray diffraction (XRD) analysis and the results revealed a cubic phase Fd-3 m of Fe3O4 with lattice a = 8.40 Å and average crystal size equal to 17.26 ± 3 nm. The mean particle size calculated from transmission electron microscopy (TEM) was 19.86 ±1.7 nm. The results of the adsorption batch experiments and the data determined using the Langmuir and Freundlich models emphasized that IO-CTAB nanoparticles were favorable for the adsorption of As(III) ions from aqueous solutions. Ultrasound measurements have shown that IO-CTAB is a cost-effective biocomposite for removing arsenic from contaminated solutions. Moreover, x-ray photoelectron spectroscopy (XPS) has shown that during the process of arsenic absorption, there is oxidation from As(III) to As(V), which leads to a decrease in toxicity during this process. The results of the cytotoxic assays confirmed that the IO-CTAB nanoparticles did not induce any morphological changes in the HeLa cells and did not affect their proliferation after 24 h of incubation.

Preparation of Porous Hydroxyapatite Using Cetyl Trimethyl Ammonium Bromide as Surfactant for the Removal of Lead Ions from Aquatic Solutions

“…The study on “removal of zinc ions using hydroxyapatite and study of ultrasound behavior of aqueous media” presented the experimental results of ultrasound measurements on water, contaminated water, and water after decontamination by temporal signal analysis allows determining the time differences between equivalent echoes in different fluids, with an accuracy of 1 ns [ 70 ]. In a recent study on “removal and oxidation of As (III) from water using iron oxide coated CTAB as adsorbent”, the efficiency of the biocomposite in the elimination of arsenic ions was evaluated by non-destructive ultrasound studies based on the time-mediated evolution of spectral attenuation of echo 1 and double distilled water [ 71 ]. The stability parameter calculated for the first echo clearly highlighted the efficiency of the biocomposite in removing arsenic from polluted water [ 71 ].…”

“…In a recent study on “removal and oxidation of As (III) from water using iron oxide coated CTAB as adsorbent”, the efficiency of the biocomposite in the elimination of arsenic ions was evaluated by non-destructive ultrasound studies based on the time-mediated evolution of spectral attenuation of echo 1 and double distilled water [ 71 ]. The stability parameter calculated for the first echo clearly highlighted the efficiency of the biocomposite in removing arsenic from polluted water [ 71 ].…”

Fabrication and Physico-Chemical Properties of Antifungal Samarium Doped Hydroxyapatite Thin Films

“…The non-destructive ultrasound studies were used in order to evaluated the stability of the suspension used to achieve 50SmHAp thin films [36][37][38]. As a reference to evaluate the stability of the suspension was used the double-distilled water.…”

Fabrication of Silver- and Zinc-Doped Hydroxyapatite Coatings for Enhancing Antimicrobial Effect

“…The X-ray photoelectron spectroscopy measurements (XPS) were recorded with a multimethod SPECS surface analysis system, as previously described in [29,30].…”