Preparation and investigation of M-MWCNT nanocomposite by hydrothermal method for Pb(II) ions adsorption

Document Type : Reasearch Paper

Authors

• Mojtaba Zabihi ¹
• Alireza Motavalizadekakhky ^{2, 3}
• Maryam Omidvar ⁴
• Rahele Zhiani ^{2, 5}
• Seyed Mohammad Mahdi Nouri ⁶
• Hamid Heydarzadeh Darzi ⁶

¹ Department of Chemical Engineering, Neyshabur Branch, Islamic Azad University, Neyshabur, Iran.

² Department of Chemistry, Neyshabur Branch, Islamic Azad University, Neyshabur, Iran.

³ Avdanced Research Center of Chemistry Biochemistry & Nanomaterial, Neyshabur Branch, Islamic Azad University, Neyshabur, Iran.

⁴ Department of Chemical Engineering, Quchan Branch, Islamic Azad University, Quchan, Iran.

⁵ New Materials Technology and Processing Research Center, Department of Chemistry, Neyshabur Branch,Islamic Azad University, Neyshabur, Iran.

⁶ Chemical Engineering Department, Hakim Sabzevari University, Sabzevar, Iran.

10.22034/ijnd.2022.1962696.2157

Abstract

In this present work, MWCNTs modified NiFe₂O₄ NPs (M-MWCNT) were successfully fabricated based on a hydrothermal route, and then utilized to Pb(II) sorption from an aqueous solution. The M-MWCNT was characterized and analyzed by SEM, TEM, FTIR, XRD, and VSM techniques. TEM image demonstrated that the size of NiFe₂O₄ nanoparticles in the structure of MWCNT was 20 nm. VSM results indicated that the M-MWCNT with saturation magnetization (Ms) value of  7 emu/g would have a fast magnetic response. According to X-ray data the average crystal sizes of the pure NiFe₂O₄ and M-MWCNT are 21.62 and 7.25 nm, respectively. The sorption kinetics, isotherms, thermodynamic and regeneration performance for lead ((Pb(II)) ions were evaluated. The M-MWCNT can effectively remove Pb(II) from aqueous solution at optimum pH of 5.5. Based on the Langmuir model, the maximum saturated adsorbed amount (q_max) of Pb(II) was up to 85.12 mg/g. The kinetic characteristic was appropriate for pseudo 1^st order model expression, and the isothermal characteristic can be described via Longmuir model. The data obtained from the thermodynamic study show that the Pb(II) sorption using M-MWCNT nanocomposite was a spontaneous, exothermic and physisorption process with a good regeneration performance.

Keywords

• NiFe2O4NPs
• Nanocomposite
• MWCNT
• Lead (II) sorption
• qmax

20.1001.1.20088868.2022.13.4.4.2

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