Adsorption of antimony(III) from aqueous solution by mercapto-functionalized silica-supported organic–inorganic hybrid sorbent: Mechanism insights

Fan, Hong-Tao; Sun, Wen; Jiang, Bing; Wang, Qingjie; Li, Dawu; Huang, Congcong; Wang, Kangjun; Zhang, Zhigang; Li, Wenxiu

doi:10.1016/j.cej.2015.10.048

Cited by 127 publications

(48 citation statements)

References 52 publications

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“…So the temperature has little impact on the removal of Sb(III) from aqueous solution onto FTHSA. Fan et al [24] got the same results when they treated the antimony wastewater by other sorbents. Moreover, the changing trend of removal efficiency under different temperatures implied that adsorbent of Sb(III) from aqueous solution onto FTHSA belongs to exothermic reaction.…”

Section: Effect Of Temperaturementioning

confidence: 66%

“…In this study, the adsorption isotherm study was carried out using Langmuir, Freundlich, and Dubinin-Radushkevich (D-R) isotherm [25]. The applicability of the isotherm models to the adsorption study data was compared by judging the correlation coefficient (R 2 ) value [25].…”

Section: Adsorption Isothermmentioning

confidence: 99%

“…The Langmuir adsorption isothermal model describes a valid monolayer adsorption process, which assumes that all the adsorption sites have equal solute affinity and that adsorption at one site does not affect the adsorption at adsorbed molecules or an adjacent site [25]. It is expressed as follows:…”

Section: Langmuir Isotherm Modelmentioning

confidence: 99%

“…The D-R isotherm model is more widely used than the Langmuir isotherm or Freundlich isothermal, because it does not assume a homogeneous surface or constant adsorption potential [25]. It may be expressed as:…”

Section: Dubinin-radushkevich Modelmentioning

confidence: 99%

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Adsorption of Antimony(III) onto Fe(III)-Treated Humus Sludge Adsorbent: Behavior and Mechanism Insights

Deng¹,

Shao²,

Ren³

et al. 2018

Pol. J. Environ. Stud.

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In this study, adsorption behaviors and mechanisms of Sb(III) ions onto Fe(III)-treated humus sludge adsorbent (FTHSA) from aqueous solutions was investigated using batch adsorption techniques, Fourier transform infrared (FT-IR) spectra and scanning electron microscopy were coupled to an energy-dispersive spectrometer (EDS). FTHSA was prepared via immersion with 1 mol/L FeCl 3. The effects of dosage, contact time, Sb(III) initial concentration, and pH on the adsorption of Sb(III) onto FTHSA were investigated. Sb(III) adsorption was favored at pH with 2.0 and decreased dramatically with increasing pH. The description of equilibrium data of Sb(III) adsorption by Langmuir, Freundlich, and Dubbin-Radushkevich isotherm models showed that Langmuir model provided the best fit for Sb(III) adsorption with maximum adsorption amount of 9.433 mg/g. Pseudo first-order, pseudo second-order, Elovich, and intraparticle diffusion model were applied to describe the adsorption process of Sb(III) ions onto FTHSA. The results showed that the pseudo second-order model described well how Sb(III) adsorption and chemical adsorption played a dominant role in the adsorption process. The FT-IR spectra also indicated that the chemical interactions as ion exchange among the metal ions and N-H, O-H, C=O, COO, and CO were mainly involved in the adsorption process. Therefore, FTHSA has a suitable potential removal for Sb(III) ions in the practical process.

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Section: Effect Of Temperaturementioning

confidence: 66%

Section: Adsorption Isothermmentioning

confidence: 99%

Section: Langmuir Isotherm Modelmentioning

confidence: 99%

Section: Dubinin-radushkevich Modelmentioning

confidence: 99%

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Adsorption of Antimony(III) onto Fe(III)-Treated Humus Sludge Adsorbent: Behavior and Mechanism Insights

Deng¹,

Shao²,

Ren³

et al. 2018

Pol. J. Environ. Stud.

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“…Given the high toxicity and severe pollution of Sb, many technologies have been developed to remove Sb from water in recent years, such as coagulation [6,7], adsorption [8,9], membrane [10], and electro-coagulation [11] related technologies. For example, many adsorbents were applied to remove Sb, such as goethite, diatomite, and Fe-Mn binary oxide [12].…”

Section: Introductionmentioning

confidence: 99%

An Effective Method to Remove Antimony in Water by Using Iron-Based Coagulants

Cheng¹,

Wang²,

Li³

et al. 2019

Water

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The effectiveness of antimony (Sb) removal by using iron-based coagulants was investigated in this study. The effects of pH, coagulant types and dose, equilibrium concentration, co-existing humic acid (HA) and anions, and oxidation process were studied. Effective Sb removal was achieved by using Fe(III)-based coagulants. However, the removal efficiency of Sb by using Fe(II)-based coagulants was very low. The removal capacity of Sb fitted the Sips adsorption isotherm well, which revealed that the heterogeneous adsorption process onto the formed hydrous ferric oxide played an important role in Sb removal, and the mechanism was further supported by Fourier transform infrared spectrum analysis. Sb removal was inhibited by the presence of HA and phosphate, as well as oxidation and aeration. Therefore, coagulation by using Fe(III)-based coagulants without oxidation is an effective and promising method for removing Sb in aqueous solution.

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Adsorptive removal of enrofloxacin with magnetic functionalized graphene oxide@ metal–organic frameworks employing D‐optimal mixture design

Gordi

Ghorbani

Khakhiyani

2020

Water Environment Research

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A novel sorbent based on a mixture of magnetic functionalized graphene oxide and MOFs was developed to remove enrofloxacin (EFX) from water samples. The prepared sorbent was characterized using Fourier transform infrared spectra, scanning electron microscope images, and X‐ray powder diffraction pattern. The sorbent compositions were optimized by the mixture experimental design. Under the optimal condition, the percentages of each sorbent component, including triethylene tetramine‐functionalized graphene oxide (FGO), Fe3O4, and MOF‐5, were 40%, 21%, and 39%, respectively. Besides, the intraparticle diffusion and pseudo‐second‐order kinetic models can describe the EFX adsorption procedure because of two adsorption mechanisms of EFX on FGO and MOF‐5. A positive standard enthalpy of 49.80 kJ/mol indicated the EFX adsorption is endothermic with a chemisorption process. The negative values of ΔGo obtained in the range of −8.979 to −3.431 kJ/mol at all studied temperatures showed that the adsorption process was also spontaneous. The Langmuir and Freundlich isotherm models were analyzed with the partition coefficient to reduce bias in the isotherm model evaluation. The maximum adsorption capacity of 344.83 mg/g and a high partition coefficient of 17.42 g/L in an initial EFX concentration of 10 mg/L were obtained for the EFX removal. Practitioner points Magnetic functionalized graphene oxide @MOF‐5 as a sorbent for the enrofloxacin removal is synthesized. The percentage amount of each component of the sorbent is optimized using the D‐optimal mixture design. Adsorption mechanisms of enrofloxacin on magnetic functionalized graphene oxide @MOF‐5 are discussed. Thermodynamic parameters for the enrofloxacin adsorption with the sorbents are determined. Isotherm model for the enrofloxacin removal with the sorbent is investigated.

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Adsorption of antimony(III) from aqueous solution by mercapto-functionalized silica-supported organic–inorganic hybrid sorbent: Mechanism insights

Cited by 127 publications

References 52 publications

Adsorption of Antimony(III) onto Fe(III)-Treated Humus Sludge Adsorbent: Behavior and Mechanism Insights

Adsorption of Antimony(III) onto Fe(III)-Treated Humus Sludge Adsorbent: Behavior and Mechanism Insights

An Effective Method to Remove Antimony in Water by Using Iron-Based Coagulants

Adsorptive removal of enrofloxacin with magnetic functionalized graphene oxide@ metal–organic frameworks employing D‐optimal mixture design

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