Cesium and cobalt adsorption on synthetic nano manganese oxide: A two dimensional infra-red correlation spectroscopic investigation

Lafi, Abdul G. Al; Abdullah, Jamal Al

doi:10.1016/j.molstruc.2015.03.027

Cited by 45 publications

(9 citation statements)

References 37 publications

(62 reference statements)

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“…As the B sites could be increased by the insertion of H + ion during the leaching treatments (Feng et al 1999), this would account for the increasing adsorption capacity of NMO toward Co 2+ . This is consistent with recent results reported by 2D-IR correlation spectroscopy (Al Lafi and Al Abdullah 2015). According to the two-site heterogeneous model for site affinity, the adsorption maxima of ions investigated suggest a model where Co 2+ shows very limited access to the edge sites that have higher affinity/binding energy in comparison with interlayer sites (Wang et al 2012b).…”

Section: Adsorption Mechanismsupporting

confidence: 91%

Adsorption of Cesium, Cobalt, and Lead onto a Synthetic Nano Manganese Oxide: Behavior and Mechanism

Abdullah

Lafi

Masri

et al. 2016

Water Air Soil Pollut

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Synthesis parameters of nano manganese oxide (NMO) were tuned in order to maximize Cs and Co sorption efficiencies. The prepared oxide was characterized using various techniques including x-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), SEM, and surface area analyzer. The sorption characteristics with respect to uptake of Cs, Co, and Pb were evaluated. An α − phase nano manganese oxide with a surface area of 165 m 2 g −1 was synthesized. Maximum adsorption capacities were 230 mg g −1 for Pb 2+ , 73 mg g −1 for Cs + , and 26 mg g −1 for Co 2+ . The intraparticle diffusion was the rate-limiting step in the case of Pb 2+ , whereas both intra-particle diffusion and film diffusion contribute to the rate-determining step in the adsorption process in the case of Cs + and Co 2+ . FT-IR analyses reveled that Cs + and Co 2+ coordinated to vacancy sites of NMO as inner-sphere complexes, while Pb 2+ formed bidentate corner-sharing complexes. NMO had high affinity for Pb 2+ but was also effective for sorption of Cs + and Co 2+ over a wide pH range, even in the presence of Na + . HCl (0.5 mol L −1 ) solution could regenerate the adsorbent successfully, and the NMO could be efficiently reused with lower production of residues. Thus, the prepared NMO can be efficiently used in wastewater treatment in terms of high adsorption capacity, easy availability, and low cost.

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Section: Adsorption Mechanismsupporting

confidence: 91%

Adsorption of Cesium, Cobalt, and Lead onto a Synthetic Nano Manganese Oxide: Behavior and Mechanism

Abdullah

Lafi

Masri

et al. 2016

Water Air Soil Pollut

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“…Since then, MnO 2 has been widely studied as a sorbents for divalent cations, such as Sr 2+ , Co 2+ , UO 2 2+ , Cu 2+ , Cd 2+ , Pb 2+ and Zn 2+ [11][12][13][14][15]. The typical K d value for Sr 2+ adsorbed onto MnO 2 is reported to be 100 mL/g [9,16], and the adsorption capacity of Co 2+ onto synthetic nano-manganese oxide is as high as 25 mg/g [11]. This shows that MnO 2 has good adsorption properties both for Sr 2+ and Co 2+ ions.…”

Section: Introductionmentioning

confidence: 99%

Removal of strontium(II) and cobalt(II) from acidic solution by manganese antimonate

Zhang

Wei

Zhao

et al. 2016

Chemical Engineering Journal

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“…All of these changes were consistent with the binding of Pb 2+ ions with the grafted polymer. The disappearance of the hydroxyl band at 3400 cm −1 indicated an ion‐exchange reaction, and the shifting of the band at 1550 to 1530 cm −1 may have indicated complex formation . The reduction in the intensity of the two bands at 1530 and 1400 cm −1 with increasing metal‐ion loading may have indicated the presence of interactions between these groups and the absorbed metal ion.…”

Section: Resultsmentioning

confidence: 99%

“…The adsorption mechanism of lead ions and their coordination to functional groups in the grafted polymers was also investigated. 2D‐COS, which was introduced to vibrational spectroscopy by Noda, has been applied to wide range of analytical spectroscopies . The use of 2D‐COS simplifies complex spectra and improves spectral resolution through the spreading of peaks over a second dimension.…”

Section: Introductionmentioning

confidence: 99%

Radiation grafting of acrylic acid and N‐vinyl imidazole onto polyethylene films for lead‐ion removal: A two‐dimensional correlation infrared spectroscopy investigation

Lafi

Ajji

2017

J of Applied Polymer Sci

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Two-dimensional infrared (IR) correlation spectroscopy was used to follow the g-radiation grafting of N-vinyl imidazole (VIm) and acrylic acid onto polyethylene films. Grafting was confirmed by the appearance of new characteristic IR bands at 1715, 1735, 1475, and 1405 cm 21 , which were assigned to carboxylic groups and the stretching vibrations of aromatic C@N and CAN bonds, respectively. The adsorption of lead ions by the grafted polymer increased with the degree of grafting, and it showed a tendency to be altered by both the chemical structure of the matrix polymer and the steric hindrance of Pb 21 ions. The previous two factors decreased the basic chelating group activity, imposed steric constraints on the formation of complexes between the Pb 21 and VIm groups, and controlled the coordination of Pb 21 with the ACOO 2 groups. IR spectroscopy combined with two-dimensional correlation spectroscopy provided a powerful tool for investigating the interactions between heavy metals and functional groups.

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Cesium and cobalt adsorption on synthetic nano manganese oxide: A two dimensional infra-red correlation spectroscopic investigation

Cited by 45 publications

References 37 publications

Adsorption of Cesium, Cobalt, and Lead onto a Synthetic Nano Manganese Oxide: Behavior and Mechanism

Adsorption of Cesium, Cobalt, and Lead onto a Synthetic Nano Manganese Oxide: Behavior and Mechanism

Removal of strontium(II) and cobalt(II) from acidic solution by manganese antimonate

Radiation grafting of acrylic acid and N‐vinyl imidazole onto polyethylene films for lead‐ion removal: A two‐dimensional correlation infrared spectroscopy investigation

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