Removal As(V) by sulfated mesoporous Fe–Al bimetallic adsorbent: Adsorption performance and uptake mechanism

Han, Cuiping; Zhang, Liming; Chen, Huirong; Shan, Xindi; Li, Xitong; Zhu, Wenjie; Luo, Yongming

doi:10.1016/j.jece.2015.12.022

Cited by 14 publications

(7 citation statements)

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“…These results indicated that the ion‐exchange between H 2 AsO 4 − and SO 4 2− was the dominant adsorption mechanism. The result is consistent with other sulphated‐contained arsenate adsorbents . Moreover, it was observed from the regenerated MSZ that the band attributed to As‐O vibration (∼845 cm −1 ) disappeared, and the band ascribed to S‐O (∼1219 cm −1 ) appeared.…”

Section: Resultssupporting

confidence: 89%

Effectively uptake arsenate from water by mesoporous sulphated zirconia: Characterization, adsorption, desorption, and uptake mechanism

et al. 2016

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Mesoporous sulphated zirconia (MSZ), prepared by a facile one‐step route, was characterized and served as arsenate adsorbent. The properties of MSZ were characterized by FTIR, N2 adsorption‐desorption isotherm, XRD, and TEM. It was found that SO42− was successfully incorporated into the obtained mesoporous material. Additionally, arsenate adsorption performance was executed by batch experiments. From the results, it was found that adsorption equilibrium data were fitted well to Langmuir‐Freundlich, and the maximum adsorption capacity was 99.23 mg/g at room temperature. The adsorption process obeyed pseudo‐second‐order under the investigated temperature, which indicated that “surface reaction” was the main rate‐limiting step. The uptake performance was not influenced by initial pH for pH in the region of 2.0–10.0. Based on the results of FTIR and the value of adsorption energy, it was demonstrated that ion‐exchange between arsenate species and sulphated groups was the dominant uptake mechanism. On this theory of uptake mechanism, 1.0 mol/L H2SO4 was successfully used to regenerate the spent MSZ. Arsenate removal percentage was still over 80 % after recycling the MSZ 3 times. These results indicated that MSZ possessed a potential application in treating arsenate‐contaminated water.

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Section: Resultssupporting

confidence: 89%

Effectively uptake arsenate from water by mesoporous sulphated zirconia: Characterization, adsorption, desorption, and uptake mechanism

et al. 2016

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“…Further H 2 AsO 4 − species replaced the sulfate groups through the electrostatic attraction mechanism along with the competitive interaction towards OH − groups. 44 The stability of Fe–Al bimetallic particles is found be high in the pH range of 5.0–9.0 signifying the negligible leaching of both Fe and Al species under neutral and weak acidic and alkaline conditions. 45 In the pH range of 4–8, Fe–Cu bimetallic particles exhibited better removal of As( v ) since the pHpzc of Fe–Cu particles is between 8 and 9.…”

Section: Effect Of Solution Ph On Oxidative Sorption Of Arsenitementioning

confidence: 94%

“…92) and is enhanced by sulfate modification. 44 Exchange of sulfate ions with H 2 AsO 4 − is the main sorption mechanism at pH higher than 4, while sorption of H 2 AsO 4 − by protonated hydroxyl groups of Fe and Al and hydrogen bonding of H 3 AsO 4 with unprotonated hydroxyl groups are the arsenate removal mechanisms at pH less than 4. 44…”

Section: Oxidative Sorption By Ironmentioning

confidence: 98%

“…43 At pH < 4.0, removal of As( v ) on sulfated mesoporous Fe–Al bimetallic particles is attributed to (i) the electrostatic attraction between the negatively charged H 2 AsO 4 − species and protonated OH groups of the adsorbent ((Al(OH) 3 and Fe(OH)O)) and (ii) the hydrogen bonding between neutral H 3 AsO 4 species and unprotonated OH groups of the adsorbent. 44 At pH > 4.0, sulfate groups are released into the solution resulting in the development of a positively charged adsorbent. Further H 2 AsO 4 − species replaced the sulfate groups through the electrostatic attraction mechanism along with the competitive interaction towards OH − groups.…”

Section: Effect Of Solution Ph On Oxidative Sorption Of Arsenitementioning

confidence: 99%

“…93 Likewise, Fe–Al adsorbents also exhibited better removal of As species due to the increased adsorption site (hydroxyl groups) compared with the single metal oxide. 44 Fe–Al binary mixed (hydr) oxides are prepared as Fe on alumina using FeCl 3 ·6H 2 O and Fe 2 (SO 4 ) 3 . 44 Fe–Al binary metal oxide synthesized using Fe 2 (SO 4 ) 3 (10 wt%) as a ferric additive exhibited higher removal of As( v ) owing to the strong interactions with the sulfate groups and alumina.…”

Section: Oxidative Sorption By Ironmentioning

confidence: 99%

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Oxidative sorption of arsenite from water by iron: a mechanistic perspective

Nidheesh

Divyapriya

Cerkez

et al. 2022

Environ. Sci.: Water Res. Technol.

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Iron-lanthanum supported on graphite sheets for As(III) removal from aqueous solution: kinetics, thermodynamic and ecotoxicity assessment

Sun,

Bao,

Chu

et al. 2024

Environ Sci Pollut Res

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The removal of arsenic from water remains a major challenge. Graphene-based material is widely used to remove arsenic from water due to their layered structure with high surface area. However, the removal of arsenic from water by iron-lanthanum (Fe-La) functionalized graphite sheets is rarely reported. Here, we have successfully fabricated nanoscale graphite sheets and synthesized Fe-La modi ed nanocrystalline hybrid material to e ciently removal As(III) from aqueous solution. The X-ray diffraction (XRD), Atomic Force Microscope (AFM), Fourier Transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), and zeta potential were used to characterized the morphology, functional groups, crystalline structure and valance state of materials to explore the effect and mechanism of Fe-La-graphite sheets (FL-graphite sheets) on As(III) removal from water. The material had the rough surface and Fe/La were evenly distributed on its surface. The results of As(III) adsorption experiments showed that the adsorption density of FL-graphite sheets for As(III) was 51.69 mg•g − 1 , which was higher than that of graphite sheet (21.91 mg•g − 1 ), La-graphite sheet (26.06 mg•g − 1 ) and Fe-graphite sheet (40.26 mg•g − 1 ). The FL-graphite sheets conformed to the Freundlich adsorption isotherm, and the maximum adsorption density was 53.62 mg•g − 1 . The pseudo second-order provided the best simulation for data of As(III) adsorption experiments, indicating that chemical reactions are the main rate-control step. XRD, XPS, and FTIR analysis revealed that the oxidation and complexation reaction on the surface of FL-graphite sheet was the main mechanism of As(III) removal. Ecotoxicity assessment revealed that FL-graphite sheets has little in uence on rice germination and growth, but reduced the toxicity of As(III) to rice by forming protective lm in rice rhizosphere. Therefore, the FL-graphite sheets has good practical application value in purifying As(III) polluted water with litter ecotoxicity.

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Removal As(V) by sulfated mesoporous Fe–Al bimetallic adsorbent: Adsorption performance and uptake mechanism

Cited by 14 publications

References 53 publications

Effectively uptake arsenate from water by mesoporous sulphated zirconia: Characterization, adsorption, desorption, and uptake mechanism

Effectively uptake arsenate from water by mesoporous sulphated zirconia: Characterization, adsorption, desorption, and uptake mechanism

Oxidative sorption of arsenite from water by iron: a mechanistic perspective

Iron-lanthanum supported on graphite sheets for As(III) removal from aqueous solution: kinetics, thermodynamic and ecotoxicity assessment

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