Simultaneous adsorption of As(V) and Cr(VI) by zeolite supporting sulfide nanoscale zero-valent iron: Competitive reaction, affinity and removal mechanism

Zhou, Chundi; Han, Cuiping; Min, Xize; Yang, Ting

doi:10.1016/j.molliq.2021.116619

Cited by 44 publications

(5 citation statements)

References 60 publications

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“…The characteristic peaks at 402.34 and 399.54 eV belong to -N + (CH 3 ) 3 and -NH, respectively. After contact with As(V), -N + (CH 3 ) 3 content is reduced from 90.47% to 76.19%, as shown in Table 4, which is ascribed to the electrostatic attraction between As(V) anions and D201 resin [53, 54]. Figures 8(c) and 8(d) illustrate the O1s XPS spectra of MnFe 2 O 4 /D201 before or after adsorbing As(V).…”

Section: Resultsmentioning

confidence: 95%

In Situ Forming MnFe₂O₄/D201 Magnetic Composite Adsorbents for High Selectivity Adsorption and Deep Treatment of As(V) from Wastewater

Zhang

Ding

Tian

et al. 2023

Adsorption Science & Technology

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A new magnetic adsorbent, namely, MnFe2O4/D201, with deep-treatment ability and high selectivity adsorption for As(V) was prepared. According to isotherm adsorption and kinetics, As(V) adsorption is primarily used for chemical bonding throughout the single-layer adsorbing process. The maximum As(V) adsorption capacity of MnFe2O4/D201 can reach 35.8 mg/g at pH 3. MnFe2O4/D201 also exhibits higher selectivity adsorption against Cl-, NO3-, SO42-, and PO43-. According to the thermodynamic results, the adsorption process was spontaneous and endothermic. The adsorption capacity is maintained at 81% of the initial after ten adsorption-desorption cycles. As(V) concentrations ranging from 1 mg/L to 10 μg/L can be treated in fixed-bed column experiments. The effectual cure volume of As(V) reaches 1332 BV (26.64 L). The removal mechanism primarily comprises electrostatic attraction and complexation.

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Section: Resultsmentioning

confidence: 95%

In Situ Forming MnFe₂O₄/D201 Magnetic Composite Adsorbents for High Selectivity Adsorption and Deep Treatment of As(V) from Wastewater

Zhang

Ding

Tian

et al. 2023

Adsorption Science & Technology

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“…There was a variety of heavy-metal ions in the actual wastewater, and these coexisting heavy-metal ions would compete with Cr(VI) for binding to the limited active sites of ZVI. , Therefore, the effect of coexisting metal ions on the removal of Cr(VI) from aqueous solution of AZVI@2 needed to be examined. As shown in Figure d, the removal of Cr(VI) (96.2 μmol/L) by AZVI@2 decreased to 88.1% only when combined with Pb 2+ solution (24.1 μmol/L).…”

Section: Resultsmentioning

confidence: 99%

Fabricating Amorphous Zero-Valent Iron for Cr(VI) Efficient Reduction: Unveiling the Effect of Ethylenediamine on Physicochemical Properties

et al. 2023

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Amorphous zero-valent iron (AZVI) has attracted wide attention due to its high-efficiency reduction ability. However, the effect of different EDA/Fe(II) molar ratios on the physicochemical properties of the synthesized AZVI requires further investigation. Herein, series of AZVI samples were prepared by changing the molar ratio of EDA/Fe(II) to 1/1 (AZVI@1), 2/1 (AZVI@2), 3/1 (AZVI@3), and 4/1 (AZVI@4). When the EDA/Fe(II) ratio increased from 0/1 to 3/1, the Fe 0 proportion on the AZVI surface increased from 26.0 to 35.2% and the reducing ability was enhanced. As for AZVI@4, the surface was severely oxidized to form a large amount of Fe 3 O 4 , and the Fe 0 content was only 74.0%. Moreover, the removal ability of Cr(VI)

show abstract

“…The characteristic peaks at 402.34 and 399.54 eV belong to -N + (CH 3 ) 3 and -NH, respectively. After contact with As(V), -N + (CH 3 ) 3 content is reduced from 90.47% to 76.19%, as shown in Table 4, which is ascribed to the electrostatic attraction between As(V) anions and D201 resin [53,54]. Figures 8(c 2and bound it to the material's surface in the form of ionic bonds.…”

Section: Adsorption Mechanism Ofmentioning

confidence: 92%

In-Situ Forming Mnfe 2 O 4 /D201 Magnetic Composite Adsorbents for High Selectivity Adsorption and Deep-Treatment of As(V) from Wastewater

et al. 2022

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Simultaneous adsorption of As(V) and Cr(VI) by zeolite supporting sulfide nanoscale zero-valent iron: Competitive reaction, affinity and removal mechanism

Cited by 44 publications

References 60 publications

In Situ Forming MnFe₂O₄/D201 Magnetic Composite Adsorbents for High Selectivity Adsorption and Deep Treatment of As(V) from Wastewater

In Situ Forming MnFe₂O₄/D201 Magnetic Composite Adsorbents for High Selectivity Adsorption and Deep Treatment of As(V) from Wastewater

Fabricating Amorphous Zero-Valent Iron for Cr(VI) Efficient Reduction: Unveiling the Effect of Ethylenediamine on Physicochemical Properties

In-Situ Forming Mnfe 2 O 4 /D201 Magnetic Composite Adsorbents for High Selectivity Adsorption and Deep-Treatment of As(V) from Wastewater

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Simultaneous adsorption of As(V) and Cr(VI) by zeolite supporting sulfide nanoscale zero-valent iron: Competitive reaction, affinity and removal mechanism

Cited by 44 publications

References 60 publications

In Situ Forming MnFe2O4/D201 Magnetic Composite Adsorbents for High Selectivity Adsorption and Deep Treatment of As(V) from Wastewater

In Situ Forming MnFe2O4/D201 Magnetic Composite Adsorbents for High Selectivity Adsorption and Deep Treatment of As(V) from Wastewater

Fabricating Amorphous Zero-Valent Iron for Cr(VI) Efficient Reduction: Unveiling the Effect of Ethylenediamine on Physicochemical Properties

In-Situ Forming Mnfe 2 O 4 /D201 Magnetic Composite Adsorbents for High Selectivity Adsorption and Deep-Treatment of As(V) from Wastewater

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In Situ Forming MnFe₂O₄/D201 Magnetic Composite Adsorbents for High Selectivity Adsorption and Deep Treatment of As(V) from Wastewater

In Situ Forming MnFe₂O₄/D201 Magnetic Composite Adsorbents for High Selectivity Adsorption and Deep Treatment of As(V) from Wastewater