Bromate removal from aqueous solutions by nano crystalline akaganeite (β-FeOOH)-coated quartz sand (CACQS)

Synthesis, characterization, and application of Fe-CNTs nanocomposite for BrO3− remediation from water samples

“…3(a)-(e)) at varied concentrations of BrO 3 À solutions also exhibited well fit of a pseudo-second-order model to experimental data. The obtained results were in good agreement with previously reported results for adsorption of BrO 3 À onto the Fe derived adsorbents: , granular ferric hydroxide [22] and nano crystalline akaganeite (b-FeOOH)-coated quartz sand [25].…”

“…As pH of the solution increases, the number of hydroxyl ions generated increases, which competes with BrO 3 À ions during the adsorption to occupy the surface of FeCNTs nanocomposite. Previous study had reported the stagnant adsorption of BrO 3 À (0.0015 mg/g) at 0.2 mg/L initial concentration of BrO 3 À onto the nano crystalline akaganeite in pH range 3-10 [25]. Chen et al [15] also reported the optimum reduction of BrO 3 À from aqueous solution by Pd/Al 2 O 3 at pH 2.…”

“…The fast BrO 3 À adsorption kinetics was observed on nano-crystalline akaganeite coated quartz sand than on Mg/Al Journal of Industrial and Engineering Chemistry 26 (2015) 218-225 layered double hydroxide nanosized adsorbent, attaining equilibrium in 10 min. The maximum monolayer adsorption capacity of nano-crystalline akaganeite coated quartz sand at 298 K for BrO 3 À was found to be 47.39 mg/g (0.04739 mg/g) [25]. Thus, the more efficient use of akaganeite (iron oxide) for BrO 3 À removal from aqueous solution in previously reported study stimulated us to determine the adsorptive efficacy of iron hydr(oxides) namely magnetite (Fe 3 O 4 ) and ferric hydroxide [Fe(OH) 3 ] for BrO 3 À removal.…”

“…Iron based nanomaterials are a promising alternative for industrial scale wastewater treatment applications as they are cost effective, have high adsorption capacity, easy separation and enhanced stability. Nano-sized adsorbents such as Mg/Al layered double hydroxide [24] and nano-crystalline akaganeite (iron oxide) coated quartz sand [25] have been reported for the removal of BrO 3 À from aqueous solutions. The fast BrO 3 À adsorption kinetics was observed on nano-crystalline akaganeite coated quartz sand than on Mg/Al A B S T R A C T Iron hydr(oxide) based multi-walled nanotubes (Fe-CNTs) nanocomposite was synthesized, and its adsorptive potential for BrO 3 À removal from synthetic and commercially available bottled water samples was tested.…”

A novel reusable nanocomposite: FeOOH/CBC and its adsorptive property for methyl orange

“…As a p-type semiconductor with a band gap of 2.12 eV, FeOOH is one of the most stable iron oxide under ambient conditions [24]. It can be synthesized by a facile method [25][26][27][28][29][30][31] and easy to be coupled with other components because of its numerous surface hydroxyl groups [32,33]. However, FeOOH nanoparticles are apt to agglomerate due to nanometer size effect, decreasing the adsorption activity.…”