Iron diffusion-doped magnesium-aluminum layered double oxides as a multifunctional adsorbent for removal of F−, Sb(III) and methyl orange contaminants from water

Zhang, Xinyue; Dai, Bushi; Ren, Shucheng; Hu, Zenan; Zheng, Xin; Wang, Yao; Sun, Hongwen; Niu, Dapeng; Wang, Linshan

doi:10.1007/s11814-020-0487-4

Cited by 14 publications

(2 citation statements)

References 54 publications

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“…At 3,000-3,100 cm -1 , the peculiar O-H stretching peak of the absorbed H2O appears. The stretching vibration of Fe-O and the bending vibration of Fe-OH, respectively, are responsible for the absorption bands between 600 and 982 cm -1 [33]. At 1,365 cm -1 , FeAlPBC exhibits a minor characteristic spike that is due to the complexation of HCO3anions.…”

Section: Physicochemical Properties Analysismentioning

confidence: 97%

Modified paddy husk carbon with linked fibrils of FeHO₂ using aluminium as surface regulator for enhanced As (III) removal in fixed bed system

Ahmad¹,

Gautam²,

Sawood³

et al. 2023

Preprint

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The As (III) uptake capacity of Fe impregnated AC greatly depends on availability of active surface sites of Iron Oxide, which is determined by the surface area of the anchoring particles. In this context, utilizing Al as a surface regulator, we proposed a process to attach linked fibrils of FeHO₂ with the objective of developing an adsorbent with enhanced As (III) adsorption capacity. The procedure was based on hydrothermal process using paddy husk based AC, and both Iron and aluminium ions in the test hydrolysis solution. By a dynamic approach that would enable an industrial-scale treatment, fixed column adsorption tests were conducted to enhance the generation of cleaner effluents and further study the primary mechanisms involved in the adsorption process. CCD was employed to evaluate the interactions between various operating process variables and their effects on the breakthrough time for optimization of As (III) adsorption process. The exhaust time was observed to rise with increasing dose, falling flow rate, and influent concentration. The CCD optimization result showed that the FeAlPBC was an efficient and cost effective adsorbent with a maximum response of 1681 min, when the independent parameters were retained at 15.0 g FeAlPBC dose, 500 µg/L influent concentrations, 2.0 mL/min flow rate, and a desirability value of 0.986. To further comprehend the primary adsorption mechanisms, the breakthrough curves were predicted by application of the test data in the Thomas, Adam-Bohart, Yoone-Nelson, and Advection diffusion models. The experimental results and Thomas and Advection diffusion models were in good agreement. 0.1 M NaOH solution was used to regenerate the columns. The FeAlPBC samples can be recycled upto four cycles with little to no reduction in adsorption capacity. Also, the TCLP test demonstrated that the used FeAlPBC were inert and could be put into landfills without risk. In conclusion, FeAlPBC is a strong contender for removing As (III) from potable water and has a wide range of potential future applications.

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Section: Physicochemical Properties Analysismentioning

confidence: 97%

Modified paddy husk carbon with linked fibrils of FeHO₂ using aluminium as surface regulator for enhanced As (III) removal in fixed bed system

Ahmad¹,

Gautam²,

Sawood³

et al. 2023

Preprint

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“…Antimony(III) in water mainly exists as non-ionic due to the hydrate with the neutral form (e.g. H 3 SbO 3 , Sb(OH) 3 ) at pH ranging from 2 to 10.4 [5,6]. Therefore it cannot be removed by simple electrostatic action.…”

Section: Introductionmentioning

confidence: 99%

Biochar microtube interconnected hydrotalcite nanosheets for the adsorption of aqueous Sb(III)

Zhang¹,

Xie²,

Guo³

et al. 2022

Nanotechnology

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Actuated by the non-ionic heavy metal of antimony (Sb) contaminants with undesired toxicity to the environment and human health, capturing Sb is urgent to remedy contaminated water. Herein, the lamellar MnCo hydrotalcite was grown on catkin-derived biochar through the in-situ etching of ZIF-L to construct a hierarchical microtube@nanosheet hybrid (CLMH) for Sb immobilization. The adsorption behaviour and mechanism of trivalent antimony (Sb (III)) on the CLMH were investigated. The CLMH shows good pH applicability for capturing Sb(III) at pH from 2 to 9. The excellent adsorption capacity of CLMH for Sb(III) is 247.62 mg/g at 303 K, and the endothermic process is proved by the positive value of ΔH^0 (10.54 kJ mol-1). The adsorption process is fitted with the intra-particle diffusion model, which can be described with external mass transfer, intraparticle diffusion in pores, and equilibrium stage. The adsorption mechanism is proved, which includes the bind of Metal-O-Sb bonds by inner-sphere complex, the embedding of Sb in the intercalation of hydrotalcite, redox between Mn and Sb, and functional groups dependent anchoring effect. The work benefits the understanding of the antimony removal behaviour over the hierarchical microtube@nanosheet hybrids.

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Antimony, a pollutant of emerging concern: A review on industrial sources and remediation technologies

2021

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Iron diffusion-doped magnesium-aluminum layered double oxides as a multifunctional adsorbent for removal of F−, Sb(III) and methyl orange contaminants from water

Cited by 14 publications

References 54 publications

Modified paddy husk carbon with linked fibrils of FeHO₂ using aluminium as surface regulator for enhanced As (III) removal in fixed bed system

Modified paddy husk carbon with linked fibrils of FeHO₂ using aluminium as surface regulator for enhanced As (III) removal in fixed bed system

Biochar microtube interconnected hydrotalcite nanosheets for the adsorption of aqueous Sb(III)

Antimony, a pollutant of emerging concern: A review on industrial sources and remediation technologies

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