Effective removal of Cr(VI) from aqueous solution through adsorption and reduction by magnetic S-doped Fe-Cu-La trimetallic oxides

Liu, Baoxia; Cheng, Chen; Li, Wei; Liu, Haiyan; Liu, Li; Deng, Shisi; Liu, Ying

doi:10.1016/j.jece.2022.107433

Cited by 17 publications

(10 citation statements)

References 53 publications

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“…6(f), (g)). 70 The percentage of M‐OH in fresh Ce/Fe 3 O 4 /FWB dramatically decreased from 31.09% to 13.02%, indicating that an ion‐exchange between M‐OH and HCrO 4 − or CrO 4 2− was an important pathway for Cr(VI) removal by Ce/Fe 3 O 4 /FWB (Eqns (12) and (13)): 70,71

3 {Fe}^{2 +} + HCr {normalO}_{4}^{-} + 7 {normalH}^{+} \to 3 {Fe}^{3 +} + {Cr}^{3 +} + 4 {normalH}_{2} O

3 {Fe}^{2 +} + Cr {normalO}_{4}^{2 -} + 8 {normalH}^{+} \to 3 {Fe}^{3 +} + {Cr}^{3 +} + 4 {normalH}_{2} O

\equiv M - O {normalH}_{2}^{+} + HCr {normalO}_{4}^{-} / Cr {normalO}_{4}^{2 -} \to \equiv M - O {normalH}_{2}^{+} \dots HCr {normalO}_{4}^{-} / Cr {normalO}_{4}^{2 -}

\equiv M - O {normalH}_{2}^{+} \dots HCr {normalO}_{4}^{-} / Cr {normalO}_{4}^{2 -} \to \equiv M - HCr {normalO}_{4} / \equiv Ce - Cr {normalO}_{4} + {normalH}_{2} O

From the above analysis, it can be concluded that electrostatic attraction, iron exchange, reduction of Cr(VI) to Cr(III), and precipitation were involved in the Cr(VI) removal by Ce/Fe 3 O 4 /FWB (Fig.…”

Section: Resultsmentioning

confidence: 99%

Preparation of Ce/ferroferric oxide/food waste‐derived biochar for aqueous Cr(VI) adsorption

Tie

Zhang

Shen³

et al. 2022

J of Chemical Tech & Biotech

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Hexavalent chromium Cr(VI) causes serious damage to human health. In this study, food waste (FW) was used as raw material to prepare the food waste-derived biochar (FWB), which was further modified using Ce and Fe 2+ /Fe 3+ co-precipitation to obtain Ce dopped magnetic waste-derived biochar (Ce/Fe3O4/FWB ) material for the efficient Cr(VI) adsorption. The morphology, structure, and characteristics of Ce/Fe3O4/FWB composite were thoroughly investigated, and its Cr(VI) uptake behavior was explored. Ce/Fe3O4/FWB showed the best Cr(VI) adsorption of 20.4 mg/g at pH 2.Additionally, the adsorption suited the pseudo-second-order kinetic equation and the Langmuir equation, and the intra-particle diffusion the main step limited the Cr(VI) adsorption by Ce/Fe3O4/FWB. The thermodynamic investigation discovered that the adsorption owned a spontaneous and endothermic nature. With increasing concentrations of Cl -, SO4 2and PO4 3-, the Cr(VI) uptake was weakened in the sequence of Cl -＜SO4 2-＜PO4 3-.Adsorbent preparation for Cr(VI) removal utilizing FW as a raw material is a sustainable and environmentally beneficial technology for FW reclamation and Cr(VI)-bearing wastewater treatment.

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3 {Fe}^{2 +} + HCr {normalO}_{4}^{-} + 7 {normalH}^{+} \to 3 {Fe}^{3 +} + {Cr}^{3 +} + 4 {normalH}_{2} O

3 {Fe}^{2 +} + Cr {normalO}_{4}^{2 -} + 8 {normalH}^{+} \to 3 {Fe}^{3 +} + {Cr}^{3 +} + 4 {normalH}_{2} O

\equiv M - O {normalH}_{2}^{+} + HCr {normalO}_{4}^{-} / Cr {normalO}_{4}^{2 -} \to \equiv M - O {normalH}_{2}^{+} \dots HCr {normalO}_{4}^{-} / Cr {normalO}_{4}^{2 -}

\equiv M - O {normalH}_{2}^{+} \dots HCr {normalO}_{4}^{-} / Cr {normalO}_{4}^{2 -} \to \equiv M - HCr {normalO}_{4} / \equiv Ce - Cr {normalO}_{4} + {normalH}_{2} O

Section: Resultsmentioning

confidence: 99%

Preparation of Ce/ferroferric oxide/food waste‐derived biochar for aqueous Cr(VI) adsorption

Tie

Zhang

Shen³

et al. 2022

J of Chemical Tech & Biotech

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“…The camphor branch at low temperature pyrolysis could be the low-cost and effective carbon-based sorbent for Cr (VI) removal from aqueous solution. Recently other kinds of adsorbents such as novel cysteine-doped PANi@faujasite composite, magnetic S-doped Fe–Cu–La trimetallic oxides, chemically modified dormant Aspergillus niger spores and so on were researched on Cr (VI) removal from aqueous solution, and the maximum adsorption capacity was excellent [ 37 , 38 , 39 ]. Further new kinds of modified biochar and the sorbent generation should be considered to study in the future.…”

Section: Discussionmentioning

confidence: 99%

Mechanism on Cr(VI) removal from aqueous solution by camphor branch biochar

Xiao

Liu

Han

et al. 2022

Heliyon

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“…Under alkaline conditions, neither surface protonation nor reduction reactions were favored. 30 Thus, the adsorption amount decreased signicantly to 3.16 mg g −1 with pH increase to 8.…”

Section: Evaluation Ofmentioning

confidence: 93%

“…Adsorption is considered as the most promising method due to its high efficiency, easy to operate, economical, renewable, and technological feasibility. 20,21 Numerous adsorbents including silica gel, 10,22 various types of nanomaterials, [23][24][25] nanobers, 19,26 biochar, 20,27 hydrogel, 28 functionalized polymers, 8,29 metal composite 30 and metal-organic frameworks 31 have been used for Cr(VI) removal.…”

Section: Introductionmentioning

confidence: 99%

Preparation of a phenylboronic acid and aldehyde bi-functional group modified silica absorbent and applications in removing Cr(vi) and reducing to Cr(iii)

et al. 2023

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Effective removal of Cr(VI) from aqueous solution through adsorption and reduction by magnetic S-doped Fe-Cu-La trimetallic oxides

Cited by 17 publications

References 53 publications

Preparation of Ce/ferroferric oxide/food waste‐derived biochar for aqueous Cr(VI) adsorption

Preparation of Ce/ferroferric oxide/food waste‐derived biochar for aqueous Cr(VI) adsorption

Mechanism on Cr(VI) removal from aqueous solution by camphor branch biochar

Preparation of a phenylboronic acid and aldehyde bi-functional group modified silica absorbent and applications in removing Cr(vi) and reducing to Cr(iii)

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