Absorption Isotherm Study of Mn2+ on MnO2 and FeO - coated zeolite from aqueous solution

Mohamadreza, Massoudinejad; Khashij, Maryam; Beheshti, Shahid

doi:10.14257/ijast.2014.72.06

Cited by 5 publications

(3 citation statements)

References 17 publications

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“…But this too has certain strict limitations that restrict its use as an adsor-bent for manganese removal. Immobilization of manganese oxide on materials like sand [25], clay [37], zeolites [38][39][40], active carbon [41,42], and glass beads [43] has been carried out, and these MnO-coated materials are used as a catalyst for effective removal of Mn from water. The MnOcoated sand showed the best results in the pH range of 5.5 to 8.0.…”

Section: Introductionmentioning

confidence: 99%

“…The equilibrium adsorption data were best represented by the Langmuir isotherm, indicating monolayer adsorption on a homogenous surface, and the adsorption capacity was found to be 0.21 mg/g at 20 °C. It was assumed that the adsorption process was controlled by physical mechanism rather than chemical [39]. Zohreh and Abedi investigated the efficiency of impregnated active carbon in manganese removal from aqueous solutions which showed highest adsorption of Mn 2+ ions at the pH of 9 (Mn 2+ removal: 67.19%) with the adsorption kinetics fitting the pseudo-second-order and intraparticle diffusion models.…”

Section: Introductionmentioning

confidence: 99%

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Adsorption of Mn²⁺ from Aqueous Solution Using Manganese Oxide-Coated Hollow Polymethylmethacrylate Microspheres (MHPM)

Dutta

Пузари

2021

Adsorption Science & Technology

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Results of investigation on adsorption of Mn2+ from aqueous solution by manganese oxide-coated hollow polymethylmethacrylate microspheres (MHPM) are reported here. This is the first report on Mn-coated hollow polymer as a substitute for widely used materials like green sand or MN-coated sand. Hollow polymethylmethacrylate (HPM) was prepared by using a literature procedure. Manganese oxide (MnO) was coated on the surface of HPM (MHPM) by using the electroless plating technique. The HPM and MHPM were characterized by using optical microscopy (OM), scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and thermogravimetric analysis (TGA). Optical and scanning micrographs were used to monitor the surface properties of the coated layer which revealed the presence of MnO on the surface of HPM. TGA showed the presence of 4-5% of MnO in MHPM. Adsorption isotherm studies were carried out as a function of pH, initial ion concentration, and contact time, to determine the adsorption efficiency for removal of Mn2+ from contaminated water by the synthesized MHPM. The isotherm results showed that the maximum adsorption capacity of MnO-coated HPM to remove manganese contaminants from water is 8.373 mg/g. The obtained R 2 values of Langmuir isotherm and Freundlich isotherm models were 1 and 0.87, respectively. Therefore, R 2 magnitude confirmed that the Langmuir model is best suited for Mn2+ adsorption by a monolayer of MHPM adsorbent. The material developed shows higher adsorption capacity even at a higher concentration of solute ions, which is not usually observed with similar materials of this kind. Overall findings indicate that MHPM is a very potential lightweight adsorbent for removal of Mn2+ from the aqueous solution because of its low density and high surface area.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Adsorption of Mn²⁺ from Aqueous Solution Using Manganese Oxide-Coated Hollow Polymethylmethacrylate Microspheres (MHPM)

Dutta

Пузари

2021

Adsorption Science & Technology

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“…All of these characteristics are important in enhancing the adsorption capacity. From the literature, it was found that Mn oxide coated activated carbon, zeolite and sand displayed higher adsorption capacity compared to Fe or Al oxide [32][33][34][35][36]. So, synthesis of CNTs/MnO 2 composite is important because it includes the properties of MnO 2 and CNTs.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of CNTs/MnO₂ composite for adsorption of ⁶⁰Co(II), ⁶⁵Zn(II) and Cd(II) ions from aqueous solutions

et al. 2016

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CNTs/MnO 2 composite was synthesized by a coprecipitation method after preparation of carbon nanotubes (CNTs) using a chemical oxidation method and was characterized using Fourier transformer infrared (FT-IR), X-ray diffraction (XRD) and scanning electron microscope (SEM). The synthesized CNTs/MnO 2 composite was used as a sorbent for the removal of some radionuclides ( 60 Co and 65 Zn-radioisotopes) and Cd (II) ions from aqueous solutions. Different parameters affecting the removal process including pH, contact time and metal ion concentration were investigated. Isotherm and kinetic models were studied. Adsorption data was interpreted in terms of both Freundlich and Langmuir isotherms and indicated that the CNTs/MnO 2 composite complied well with both Langmuir and Freundlich models for Zn and Cd(II) ions from loaded samples was studied using different eluents.

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How to Improve Selectivity of a Material for Adsorptive Separation Applications

Saini

Shankar

2018

Handbook of Environmental Materials Management

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Absorption Isotherm Study of Mn2+ on MnO2 and FeO - coated zeolite from aqueous solution

Abstract: The present study is

Cited by 5 publications

References 17 publications

Adsorption of Mn²⁺ from Aqueous Solution Using Manganese Oxide-Coated Hollow Polymethylmethacrylate Microspheres (MHPM)

Adsorption of Mn²⁺ from Aqueous Solution Using Manganese Oxide-Coated Hollow Polymethylmethacrylate Microspheres (MHPM)

Evaluation of CNTs/MnO₂ composite for adsorption of ⁶⁰Co(II), ⁶⁵Zn(II) and Cd(II) ions from aqueous solutions

How to Improve Selectivity of a Material for Adsorptive Separation Applications

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Absorption Isotherm Study of Mn2+ on MnO2 and FeO - coated zeolite from aqueous solution

Abstract: The present study is

Cited by 5 publications

References 17 publications

Adsorption of Mn2+ from Aqueous Solution Using Manganese Oxide-Coated Hollow Polymethylmethacrylate Microspheres (MHPM)

Adsorption of Mn2+ from Aqueous Solution Using Manganese Oxide-Coated Hollow Polymethylmethacrylate Microspheres (MHPM)

Evaluation of CNTs/MnO2 composite for adsorption of 60Co(II), 65Zn(II) and Cd(II) ions from aqueous solutions

How to Improve Selectivity of a Material for Adsorptive Separation Applications

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Product

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Adsorption of Mn²⁺ from Aqueous Solution Using Manganese Oxide-Coated Hollow Polymethylmethacrylate Microspheres (MHPM)

Adsorption of Mn²⁺ from Aqueous Solution Using Manganese Oxide-Coated Hollow Polymethylmethacrylate Microspheres (MHPM)

Evaluation of CNTs/MnO₂ composite for adsorption of ⁶⁰Co(II), ⁶⁵Zn(II) and Cd(II) ions from aqueous solutions