Synthesis and characterization of bifunctional mesoporous silica adsorbent for simultaneous removal of lead and nitrate ions

Chen, Feiyun; Wu, Qiuping; Lü, Qiu‐Feng; Xu, Yali; Yu, Yan

doi:10.1016/j.seppur.2015.07.024

Cited by 45 publications

(12 citation statements)

References 49 publications

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“…As a result, the removal of NO 3 – ions decreased to 82.5 from 92%. Similar findings were reported by Yu and group during the simultaneous removal of Pb 2+ and NO 3 – ions at pH 5 by using bifunctional mesoporous silica adsorbent …”

Section: Resultssupporting

confidence: 90%

“…The role of BPBMO as a bifunctional material for the simultaneous removal of Pb 2+ and NO 3 – ions can be compared with reported silica based materials. ,,− Particularly, Yu and group have synthesized the acid–base bifunctional (dual electrostatic characteristics) mesoporous silica (Al-MS2) for the simultaneous removal of Pb 2+ and NO 3 – and the removal capacity was found to be higher than the BPBMO (Table S1). However, the mechanism was not confirmed by the instrumentation techniques. The lower removal capacity of the BPBMO material could be attributed to the functional groups covalently integrated within the pore walls.…”

Section: Resultsmentioning

confidence: 99%

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l-Proline Functionalized Dicationic Framework of Bifunctional Mesoporous Organosilica for the Simultaneous Removal of Lead and Nitrate Ions

Dinker

Ajithkumar

Kulkarni

2017

ACS Sustainable Chem. Eng.

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A novel bifunctional mesoporous organosilica, PEG-functionalized bis-prolinium chloride bridged mesoporous organosilica (BPBMO) was synthesized by reacting the precursor, PEG-functionalized bis-prolinium chloride bridged organosilane (BPRIL) with tetraethyl orthosilicate (TEOS) in the presence of surfactant. The chemical conformation of BPBMO was investigated by using Fourier transform infrared (FTIR), thermogravimentric analysis (TGA), 13C, and 29Si cross-polarization/magic angle spinning (CP/MAS) NMR techniques. The characterization represents PEG-linked-prolinium (−N+Cl–) and carboxyl (−COOH) entities, constructing the dicationic framework through siloxane (Si–O–Si) linkages. The pore-wall distribution and the periodicity of BPBMO retained during the synthesis were examined by small-angle X-ray scattering (SAXS), Brunauer-Emmett-Teller-Barrett-Joyner-Halenda (BET-BJH), and transmission electron microscopy (TEM) techniques. The results revealed BPBMO as a spherical shaped solid (50–100 nm) having mesopore channels hexagonally arranged with interparticle porosity (S BET = 487 m2/g and D BJH = 5.1 nm). The material has provided active binding sites for the simultaneous removal of NO3 – and Pb2+ ions when introduced in the aqueous solutions of Pb(NO3)2 (50 mg/L, pH 6). The removal of NO3 – by ion-exchange with prolinium (−N+Cl–) entities and the electrostatic interaction of Pb2+ with carboxylate (−COO–) group were characterized by using Raman spectroscopy, ion chromatography, and X-ray photoelectron spectroscopy (XPS) technique. The maximum removal of NO3 – and Pb2+ ions were achieved within 1 h of the adsorption reaction. The adsorption has followed the Langmuir isotherm model with the adsorption capacities (q m) of 23.04 and 21.92 mg/g for NO3 – and Pb2+ ions, respectively. The efficiency of the adsorbent was also compared with other adsorbents. Further, the BPBMO material has depicted three consecutive adsorption/desorption cycles with negligible loss in the structural conformation.

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Section: Resultssupporting

confidence: 90%

Section: Resultsmentioning

confidence: 99%

l-Proline Functionalized Dicationic Framework of Bifunctional Mesoporous Organosilica for the Simultaneous Removal of Lead and Nitrate Ions

Dinker

Ajithkumar

Kulkarni

2017

ACS Sustainable Chem. Eng.

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“…The two diffraction peaks observed at 2θ of 17.1°and 29.8°for PAN indicates its crystalline structure. This obtained XRD pattern of PAN agrees well with those reported in literature [13][14][15][16][17][18][19][20][21][22][23][24][25]. The XRD pattern of KCuHFC showed diffraction peaks at 2θ of 17.5°, 24.9°, 35.8°, 39.9°, 43.9°, 51.3°, 54.7°and 57.8°, which are characteristic peaks for crystalline metal ferrocyanides [26,27].…”

Section: Characterizationsupporting

confidence: 90%

“…Yan et al evaluated the simultaneous adsorption of Cd 2+ and HAsO 4 2− from metallurgical wastewater using titanium dioxide, nanoscale zero-valent iron, granular ferric oxide and activated alumina [18]. Bifunctional mesoporous silica adsorbent was synthesized by Chen et al [19] for simultaneous removal of Pb 2+ and NO 3 − . Simultaneous removal and recovery of Cd 2+ and CN − from simulated electroplating rinse wastewater by a strip dispersion hybrid liquid membrane containing double carrier was studied by He et al [20].…”

Section: Introductionmentioning

confidence: 99%

Efficient removal of radiocobalt and manganese from their binary aqueous solutions by batch adsorption process using PAN/HDTMA/KCuHCF composite

et al. 2020

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Simultaneous removal of radiocobalt and manganese by adsorption onto polyacrylonitrile/hexadecyltrimethylammonium bromide/potassium copper hexacyanoferrate (PAN/HDTMA/KCuHCF) composite was studied. The synthesized composite was characterized by Fourier-transformed infrared (FT-IR), thermogravimetric analysis (TGA) and X-ray diffraction (XRD). The influence of the solution pH was studied in the range 1.5–7.8 and the results showed the effectiveness of the synthesized composite for simultaneous adsorption of radiocobalt and manganese in the pH range 2.5–6 at an adsorbent mass of 4 g/L. Adsorption kinetic data of manganese at the studied concentrations were best fitted by pseudo-second-order kinetic model and the diffusion study showed that the adsorption process was controlled by film diffusion. Thermodynamic parameters (ΔGo, ΔHo and ΔSo) were estimated and the results indicated that adsorption processes of the concerned (radio)toxicants were spontaneous and endothermic in nature. Of the studied isotherm models, Freundlich and Langmuir were the best ones for describing the adsorption isotherm data of radiocobalt and manganese, respectively. The adsorption capacity of PAN/HDTMA/KCuHCF was found to be 23.629 (for radiocobalt) and 62.854 (for manganese). Desorption of Radiocobalt and manganese loaded onto PAN/HDTMA/KCuHCF composite was studied using various desorbing agents at different concentrations.

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“…The traditional methods for removing Pb(II) include reduction [7], extraction [8], ion exchange [9], precipitation [10,11], and membrane separation [12], which suffer the problems of low efficiency and high operating costs. Adsorption is achieved by adsorbent combining with pollutants by physical and chemical attractive forces and is considered one of the most successful and economical technologies for removing contaminants from aqueous solution [13–15]. Various adsorbents, such as carbonaceous materials [16], minerals [17] and macromolecules [18], have been widely applied to remove Pb(II).…”

Section: Introductionmentioning

confidence: 99%

Efficient removal of Pb(II) from aqueous solution by a novel ion imprinted magnetic biosorbent: Adsorption kinetics and mechanisms

Xiao

et al. 2019

PLoS ONE

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It is vital to understand the adsorption mechanisms and identify the adsorption kinetics when applying an adsorbent to remove heavy metals from aqueous solution. A Pb(II) imprinted magnetic biosorbent (Pb(II)-IMB) was developed for the removal of Pb 2+ via lead ion imprinting technology and crosslinking reactions among chitosan (CTS), Serratia marcescens and Fe 3 O 4 . The effect of different parameters such as solution pH, adsorbent dosage, selectivity sorption and desorption were investigated on the absorption of lead ion by Pb(II)-IMB. The adsorbent was characterized by a Brunauer-Emmett Teller (BET) analysis, X-ray diffraction (XRD), vibrating sample magnetometry (VSM), scanning electron microscopy (SEM) and energy dispersive spectrometry (EDS). The adsorption kinetics, equilibrium and thermodynamics of Pb(II)-IMB for Pb(II) were studied. The results of the abovementioned analyses showed that the adsorption kinetic process fit well with the second-order equation. The adsorption isotherm process of Pb(II) on the Pb(II)-IMB was closely related to the Langmuir model. Thermodynamic studies suggested the spontaneous and endothermic nature of adsorption of Pb(II) by Pb(II)-IMB. The adsorption mechanism of Pb(II)-IMB was studied by Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). The results indicated that the nitrogen in the amino group and the oxygen in the hydroxyl group of Pb(II)-IMB were coordination atoms.

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Synthesis and characterization of bifunctional mesoporous silica adsorbent for simultaneous removal of lead and nitrate ions

Cited by 45 publications

References 49 publications

l-Proline Functionalized Dicationic Framework of Bifunctional Mesoporous Organosilica for the Simultaneous Removal of Lead and Nitrate Ions

l-Proline Functionalized Dicationic Framework of Bifunctional Mesoporous Organosilica for the Simultaneous Removal of Lead and Nitrate Ions

Efficient removal of radiocobalt and manganese from their binary aqueous solutions by batch adsorption process using PAN/HDTMA/KCuHCF composite

Efficient removal of Pb(II) from aqueous solution by a novel ion imprinted magnetic biosorbent: Adsorption kinetics and mechanisms

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