Fe3O4 and iminodiacetic acid modified peanut husk as a novel adsorbent for the uptake of Cu (II) and Pb (II) in aqueous solution: Characterization, equilibrium and kinetic study. (1st January 2021)

• Record Type: Journal Article
• Authors: Aryee, Aaron Albert; Mpatani, Farid Mzee; Du, Yangyang; Kani, Alexander Nti; Dovi, Evans; Han, Runping; Li, Zhaohui; Qu, Lingbo
• Is Part Of: Environmental pollution. Volume 268(2021)Part A
• Publication Date: 2021-01-01
• Subjects: Modified magnetic peanut husk -- Adsorption -- Copper ion -- Lead ion -- Regeneration; Pollution -- Periodicals; Pollution -- Environmental aspects -- Periodicals; Environmental Pollution -- Periodicals; Pollution -- Périodiques; Pollution -- Aspect de l'environnement -- Périodiques; Pollution -- Effets physiologiques -- Périodiques; Pollution; Pollution -- Environmental aspects; Periodicals; Electronic journals; 363.73
• DOI: 10.1016/j.envpol.2020.115729
• Languages: English
• ISSNs: 0269-7491

Abstract

Abstract: The presence of higher concentrations of heavy metals in water affects its quality with a concomitant adverse effect on its users thus their removal is paramount. A novel adsorbent, PN-Fe3 O4 -IDA derived from the chemical modification of peanut husk (a low-cost agricultural biomass produced in significant quantities globally) using magnetic nanoparticles (Fe3 O4 ) and iminodiacetic acid was utilized for the remediation of heavy metals in aqueous solution. Analytical techniques vis-à-vis the Fourier-Transform Infrared, Scanning Electron Microscope, Brunauer–Emmett–Teller, X-ray photoelectron spectroscopy and X-ray Diffraction were applied for the characterization of PN-Fe3 O4 -IDA. Results from the characterization studies showed that PN-Fe3 O4 -IDA possessed a mesoporous structure, a heterogeneous surface and functional groups such as carboxylic acid and a tertiary nitrogen atom which enhanced its adsorption capacities as well as magnetic properties which ensured its easy removal from the solution using a magnet. The maximum uptake of Pb and Cu onto PN-Fe3 O4 -IDA was 0.36 and 0.75 mmol g −1 (at 318 K) respectively with the chemisorption process being the major reaction pathway for the processes. The synthesized adsorbent exhibits significant adsorption capacity for the selected pollutants as well as some unique features which promotes its use as an adsorbent for wastewater remediation processes. Graphical abstract: Image 1 Highlights: Iminodiacetic functionalized magnetic peanut husk (PN–Fe3 O4 -IDA) was synthesized. PN-Fe3 O4 -IDA was used as an adsorbent for the removal of Cu and Pb in solution. Coordination and electrostatic attraction are main mechanisms for the adsorption. High removal efficiency and operational convenience with the use of PN-Fe3 O4 -IDA. Excellent features of PN-Fe3 O4 -IDA promotes its practical applications.