New insight on the adsorption capacity of metallogels for antimonite and antimonate removal: From experimental to theoretical study

You, Deng; Min, Xiaoye; Liu, Lingling; Ren, Zhong; Xiao, Xiao; Pavlostathis, Spyros G.; Luo, Jinming; Luo, Xubiao

doi:10.1016/j.jhazmat.2017.12.035

Cited by 38 publications

(17 citation statements)

References 59 publications

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“…Specifically, adsorption of metals by eco-friendly nanoparticles (NPs) has attracted much interest as an efficient technique for the removal of organic contaminants and heavy metal ions from water and wastewater [7]. In recent years, the nanoparticles have been used to remove pollutants as adsorption processes [9][10][11], and as heterogeneous advanced oxidation processes [12,13].…”

Section: A Esrafili Et Al / Desalination and Water Treatment 158 (2mentioning

confidence: 99%

Simultaneous adsorption of heavy metal ions (Cu2+ and Cd2+) from aqueous solutions by magnetic silica nanoparticles (Fe3O4@SiO2) modified using EDTA

Esrafili¹,

Bagheri²,

Kermani³

et al. 2019

Desalination and Water Treatment

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In this study, Fe 3 O 4 @SiO 2 magnetic nanoparticles are modified with EDTA and used as a selective and efficient adsorbent for the removal of Cu 2+ and Cd 2+ heavy metals. The Fe 3 O 4 @SiO 2-EDTA nano composite is characterized using scanning electron microscopy, energy-dispersive X-ray, X-ray diffraction, Fourier-transform infrared spectroscopy, and Brunauer-Emmett-Teller. Nanoparticles are separated by an external magnet after the adsorption process. Adsorption equilibrium is achieved in 60 min, and the maximum removal of metal ions is obtained at pH 7. Isotherm analysis indicated that the adsorption data fit well to the Langmuir isotherm model. The maximum adsorption capacities are 79.4 and 73.5 mg/g for Cu 2+ and Cd 2+ , respectively. In addition, adsorption kinetic data agree with pseudo-second-kinetic order for both tested metal ions. Also, the adsorption process efficiency is investigated in the presence of K + , Na + , Mg 2+ , and Ca 2+ cations at the optimal conditions. This study indicates that the Fe 3 O 4 @SiO 2-EDTA is a rapid, efficient, and reusable sorbent to remove Cd 2+ and Cu 2+ cations from contaminated aquatic solution.

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Section: A Esrafili Et Al / Desalination and Water Treatment 158 (2mentioning

confidence: 99%

Simultaneous adsorption of heavy metal ions (Cu2+ and Cd2+) from aqueous solutions by magnetic silica nanoparticles (Fe3O4@SiO2) modified using EDTA

Esrafili¹,

Bagheri²,

Kermani³

et al. 2019

Desalination and Water Treatment

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“…The ability for magnetic separation is a much more powerful approach to solid recovery than normal separation methods for instance sedimentation, filtration, etc. However, a number of studies have shown that Fe 3 O 4 has limitations, since its sorption capability is comparatively low compared to emerging solid phases [15][16][17][18][19]. Therefore, research to identify improved adsorption capacity of Fe 3 O 4 is a major opportunity [12].…”

Section: Introductionmentioning

confidence: 99%

Enhancing the Removal of Sb (III) from Water: A Fe3O4@HCO Composite Adsorbent Caged in Sodium Alginate Microbeads

et al. 2020

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To remove antimony (Sb) ions from water, a novel composite adsorbent was fabricated from ferriferous oxide and waste sludge from a chemical polishing process (Fe3O4@HCO) and encapsulated in sodium alginate (SAB). The SAB adsorbent performed well with 80%–96% removal of Sb (III) ions within a concentration range of 5–60 mg/L. The adsorption mechanism of Sb (III) was revealed to be the synergy of chemisorption (ion exchange) and physisorption (diffusion reaction). The adsorption isotherms and kinetics conformed to the Langmuir isotherm and the pesudo-second-order kinetic model. Both initial pH and temperature influenced the adsorption performance with no collapse of microbeads within solution pH range 3–7. Most importantly for practical applications, these microspheres can be separated and recovered from aqueous solution by a magnetic separation technology to facilitate large-scale treatment of antimony-containing wastewater.

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“…To know the influence of electrostatic interaction on Sb(III) adsorption by HRM@nFe 3 O 4 , the relation between pH values and adsorption capacity was investigated, and the zeta potentials of HRM@nFe 3 O 4 before and after reaction were detected. As shown in Figure 4, little effect of pH was observed on the adsorption of Sb(III) [49]. The adsorption capacity was approximately constant in the pH range from 2.6 to 11.6.…”

Section: Adsorption Behavior 331 Effect Of Solution Phmentioning

confidence: 87%

Efficient Removal of Antimony(III) in Aqueous Phase by Nano-Fe3O4 Modified High-Iron Red Mud: Study on Its Performance and Mechanism

Peng

Luo

et al. 2021

Water

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The resource utilization of excess red mud produced from aluminum production is a current research focus. In this study, novel nano-Fe3O4 modified high-iron red mud material (HRM@nFe3O4) was fabricated using the method of co-precipitation to remove Sb(III) from the aqueous phase. The HRM@nFe3O4 at a nFe3O4:HRM mass ratio of 1:1 had optimal adsorbing performance on Sb(III) in water. Compared with others, the synthetic HRM@nFe3O4 sorbent had a superior maximum Sb(III) adsorption capacity of 98.03 mg·g−1, as calculated by the Langmuir model, and a higher specific surface area of 171.63 m2·g−1, measured using the Brunauer-Emmett-Teller measurement. The adsorption process was stable at an ambient pH range, and negligibly limited by temperature the coexisting anions, except for silicate and phosphate, suggesting the high selectivity toward Sb(III). HRM@nFe3O4 retained more than 60% of the initial adsorption efficiency after the fifth adsorption-desorption cycle. The kinetic data fitted by the pseudo-second-order model illustrated the existence of a chemical adsorption process in the adsorption of Sb(III). Further mechanism analysis results indicated that the complexation reaction played a major role in Sb(III) adsorption by HRM@nFe3O4. This HRM@nFe3O4 adsorbent provides an effective method for the removal of Sb(III) in wastewater treatment and is valuable in the reclamation of red mud.

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New insight on the adsorption capacity of metallogels for antimonite and antimonate removal: From experimental to theoretical study

Cited by 38 publications

References 59 publications

Simultaneous adsorption of heavy metal ions (Cu2+ and Cd2+) from aqueous solutions by magnetic silica nanoparticles (Fe3O4@SiO2) modified using EDTA

Simultaneous adsorption of heavy metal ions (Cu2+ and Cd2+) from aqueous solutions by magnetic silica nanoparticles (Fe3O4@SiO2) modified using EDTA

Enhancing the Removal of Sb (III) from Water: A Fe3O4@HCO Composite Adsorbent Caged in Sodium Alginate Microbeads

Efficient Removal of Antimony(III) in Aqueous Phase by Nano-Fe3O4 Modified High-Iron Red Mud: Study on Its Performance and Mechanism

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