Synergistic effect of iron doped ordered mesoporous carbon on adsorption-coupled reduction of hexavalent chromium and the relative mechanism study

Tang, Lin; Yang, Guide; Zeng, Guangming; Cai, Ye; Li, Sisi; Zhou, Yaoyu; Pang, Ya; Liu, Yuan-Yuan; Zhang, Yi; Luna, Brandon

doi:10.1016/j.cej.2013.10.104

Cited by 225 publications

(72 citation statements)

References 36 publications

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“…These results are very positive as they demonstrate the applicability and efficiency of alginate beads in the removal of large amounts of cobalt ions from contaminated waters. Hexavalent chromium [15] and cadmium ions [16] have also been adsorbed with novel biomaterials. Yang et al [16] have recently reported the use of α-ketoglutaric acid-modified magnetic chitosan for the removal of cadmium (II) ions, obtaining an equilibrium adsorption capacity of 72 mg/g, according to the pseudo-second order kinetics.…”

Section: Pseudo-second Order Modelmentioning

confidence: 99%

Adsorption Kinetics of Cobalt (II) Ions onto Alginate Beads from Aqueous Solutions

K¹

2014

J Earth Sci Clim Change

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Section: Pseudo-second Order Modelmentioning

confidence: 99%

Adsorption Kinetics of Cobalt (II) Ions onto Alginate Beads from Aqueous Solutions

K¹

2014

J Earth Sci Clim Change

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“…The 29 Si MAS NMR and 13 C CP MAS NMR spectra of the synthesized materials not only disclosed the structural information of the synthesized support material but also removed the ambiguity on the successful functionalization and further immobilization of the ligand over MCM-41. Figure 6 represents the 29 Si MAS NMR spectra of (a) MCM-41 and (b) NCO-MCM-41 materials.…”

Section: Solid State 29 Si Mas and 13 C Cp Mas Nmr Analysesmentioning

confidence: 98%

“…Figure 6 represents the 29 Si MAS NMR spectra of (a) MCM-41 and (b) NCO-MCM-41 materials. In the spectrum of MCM-41 (Fig.…”

Section: Solid State 29 Si Mas and 13 C Cp Mas Nmr Analysesmentioning

confidence: 99%

“…Thermogravimetric analysis (TGA, Perkin Elmer Pyris Diamond) was carried out at a heating rate of 10°C min -1 in air. 13 C cross-polarization magic angle spinning (CP MAS) and 29 Si magic angle spinning (MAS) NMR (Bruker DSX 400) spectra were obtained with a 4 mm zirconia rotor spinning at 6 kHz [resonance frequencies of 79.5 and 100.6 MHz for 29 Si and 13 C cross polarization (CP) MAS NMR, respectively; 90°pulse width of 5 ms, contact time of 2 ms, recycle delay of 3 s for both 29 assigned that there is a contraction to the mesophase due to complete condensation of silanol groups during the calcination process. Obviously, the mesoporous structure retained after calcination and modifications with functional molecules.…”

Section: Characterizationmentioning

confidence: 99%

“…It is worth noting that solid-phase extraction (SPE) technique exhibits numerous advantages such as flexibility, high preconcentration factors, high capture capacity, speed and simplicity, possibilities for field sampling and ease of automation [28]. To date, researchers have proposed different techniques for the removal of Cr(IV) and Cr(III) from different sources of water [7,29,30,49].…”

Section: Introductionmentioning

confidence: 99%

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Adsorption of Cr(III) ions using 2-(ureylenemethyl)pyridine functionalized MCM-41

et al. 2015

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Modified MCM-41 material with uniform meropore channels was prepared by surfactant-directed synthesis strategy and post functionalized with 3-(triethoxysilyl)propyl isocyanate (ICPES). By utilizing the reaction between -NCO group of ICPES and -NH 2 group of 2-picolylamine in acetonitrile, the chelating ligand, 2-(ureylenemethyl)pyridine, has been successfully immobilized over MCM-41 (UMP-MCM-41) without destroying the mesoporous structure. The synthesized materials show very good mesoporosity and long range order. The ability of removing chromium from water and artificial seawater by using the UMP-MCM-41 mesoporous material was explored. The synthesized material showed good adsorption ability for Cr(III) ions from water and artificial seawater with selectivity of 36 and 64 %, respectively, in the presence of interfering metal ions such as Zn(II), Cd(II), Co(II), and Cu(II). In order to disclose the adsorption ability of the material from single metal ion solution for Cr(III) ion, factors such as effect of pH, stirring time, initial ion concentration and presence of ethanol in adsorption medium were also explored. Further the experiments revealed that the UMP-MCM-41 is giving maximum adsorption at pH 6. The adsorption equilibrium has been attained within 5 h with 84 % adsorption. Moreover, the presence of ethanol in the adsorption medium enhances the amount of adsorption.

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TEOS as an improved alternative for chitosan beads cross‐linking: A comparative adsorption study

Copello

Villanueva

González

et al. 2014

J of Applied Polymer Sci

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In this work the use of tetraethoxysilane (TEOS) for cross‐linking of chitosan hydrogel beads was studied at the level of 1 mmol TEOS per gram of chitosan. They were compared with glutaraldehyde and epichlorohydrin cross‐linked beads. The hydrogels were characterized by FTIR, SEM, water content, nitrogen content, and their point of zero charge. The performance of the anionic dye Remazol Black (RB) and the cationic Cd(II) adsorptions was assessed in order to characterize the sorbate–sorbent interaction. Adsorption experimental data were analyzed using two‐ and three‐parameter isotherm models along with the evaluation of mean adsorption energy and standard free energy. The adsorption was observed to be pH dependent. The uptake rate of RB and Cd(II) showed that the three type of beads followed a similar kinetic behavior. For both sorbates the TEOS cross‐linked beads showed the higher maximum adsorption capacity, followed by epichlorohydrin and glutaraldehyde cross‐linked beads. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 41005.

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Synergistic effect of iron doped ordered mesoporous carbon on adsorption-coupled reduction of hexavalent chromium and the relative mechanism study

Cited by 225 publications

References 36 publications

Adsorption Kinetics of Cobalt (II) Ions onto Alginate Beads from Aqueous Solutions

Adsorption Kinetics of Cobalt (II) Ions onto Alginate Beads from Aqueous Solutions

Adsorption of Cr(III) ions using 2-(ureylenemethyl)pyridine functionalized MCM-41

TEOS as an improved alternative for chitosan beads cross‐linking: A comparative adsorption study

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