Excellent adsorptive performance of a new nanocomposite for removal of toxic Pb(II) from aqueous environment: Adsorption mechanism and modeling analysis

Ayoub Abdullah Alqadami; Mu Naushad; Zeid A ALOthman; Mohammed Alsuhybani; Mohammad Algamdi

doi:10.1016/j.jhazmat.2019.121896

Excellent adsorptive performance of a new nanocomposite for removal of toxic Pb(II) from aqueous environment: Adsorption mechanism and modeling analysis

J Hazard Mater. 2020 May 5:389:121896. doi: 10.1016/j.jhazmat.2019.121896. Epub 2019 Dec 13.

Authors

Ayoub Abdullah Alqadami¹, Mu Naushad², Zeid A ALOthman², Mohammed Alsuhybani³, Mohammad Algamdi³

Affiliations

¹ Department of Chemistry, College of Science, King Saud University, Bld#5, Riyadh, KSA, Saudi Arabia. Electronic address: aalkudami@ksu.edu.sa.
² Department of Chemistry, College of Science, King Saud University, Bld#5, Riyadh, KSA, Saudi Arabia.
³ King Abdulaziz City for Science and Technology, Riyadh, Saudi Arabia.

PMID: 31879118
DOI: 10.1016/j.jhazmat.2019.121896

Abstract

Herein, a novel nanocomposite (Fe₃O₄@TATS@ATA) was prepared and used for adsorptive removal of Pb(II) ions from aqueous environment. The magnetic nanocomposite (Fe₃O₄@TATS@ATA) was characterized using FTIR, TEM, SEM, EDX, element mapping analysis (EMA), TGA analysis, XRD patterns, VSM, BET analysis, XPS spectrum, and zeta potential. The FTIR study confirmed the modification of Fe₃O₄ nanoparticles with triaminetriethoxysilane and 2-aminoterephthalic acid while XPS analysis (with peaks at 283.6, 285.1, 286.3, 284.5.0, 288.4 eV) displayed the presence of CSi, CN, OCNH, CC/CC and OCO functional groups, respectively on Fe₃O₄@TATS@ATA. The BET surface area, average pore size, pore volume and magnetization saturation for Fe₃O₄@TATS@ATA were found to be 114 m²/g, 6.4 nm, 0.054 cm^-3/g, and 22 emu/g, respectively. The adsorption isotherm data showed that Pb(II) adsorption onto Fe₃O₄@TATS@ATA fitted to Langmuir and Dubinin-Raduskevich isotherm model due to better R² value which was greater than 0.9 and q_m of Pb(II) was 205.2 mg/g at pH 5.7 in 150 min. Adsorption kinetics data displayed that Pb(II) adsorption onto Fe₃O₄@TATS@ATA was fitted to the pseudo-second-order and Elovich kinetic models. Thermodynamic outcomes exhibited the exothermic and spontaneous nature of adsorption. Results showed that Fe₃O₄@TATS@ATA nanocomposite was promising material for efficient removal of toxic Pb(II) from aqueous environment.

Keywords: Adsorption; Mechanism; Multifunctional; Nanocomposite; Toxic lead Pb(II).

Publication types

Research Support, Non-U.S. Gov't