New Iminodiacetate Chelating Resin-Functionalized Fe₃O₄ Nanoparticles: Synthesis, Characterization, and Application for the Removal of Some Noxious Metal Ions from Wastewater

Abstract

A new type of magnetic chelating resin (MIDA) beads bearing iminodiacetate groups derived from acrylamide−N,N′-methylenebis(acrylamide) copolymer was synthesized in the presence of Fe 3 O 4 nanoparticles and tested for the removal of Cu(II), Pb(II), Zn(II), and Cd(II) from aqueous solution. The prepared Fe 3 O 4 nanoparticles were characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM)-energy dispersive X-ray, transmission elelctron microscopy, and X-ray diffraction (XRD). The obtained MIDA was characterized by FTIR, SEM, Brunauer−Emmett−Teller analysis, XRD, thermal analysis, and water regain (W%). Different factors affecting the adsorption process such as pH of solution, initial concentration of the metal ions, shaking time, and temperature of solution, were investigated by batch technique. The maximum adsorption capacities were 4.1, 3.6, 2.4, and 2.2 mmol•g −1 for Cu(II), Pb(II), Zn(II), and Cd(II), respectively. Langmuir isotherm and pseudo-second-order equation could adequately describe the adsorption process of all metal ions. Thermodynamic parameters revealed that the adsorption process is endothermic, spontaneous in nature, and entropy driven. Additionally, the removal of Cu(II) was tested using the fixed-bed column technique. The effect of significant column parameters such as bed height, flow rate, and Cu(II) concentration on the performance of the column were examined. The breakthrough curves obtained were analyzed by Thomas and Yoon−Nelson kinetic models. The regeneration of the exhausted column bed was conducted with 0.1 M HNO 3 solution, and MIDA was found to maintain its high adsorption capacity up to six cycles.

Facile Synthesis of Calcite-Impregnated Hydrochar with High Sorption Capacity for Cu(II) from Aqueous Solution

“…3 Among these treatment methods, adsorption is a prevailing approach to remove heavy metals from wastewater due to its low cost and simple operation. However, the widespread application of adsorption has been largely restricted because the common adsorbents such as activated carbon, 5 zeolite, 6 and other carbon-based materials 7,8 are expensive and/or difficult to regenerate. Thus, it is very desirable to prepare an efficient, environmental-friendly, and economical adsorbent to isolate heavy metals from wasterwater.…”

Detection of hexavalent chromium in aqueous solutions using laser-induced fluorescence from ion exchanged resin

“…FTIR spectra of D301 were analyzed with the instrument (FTIR, 380-Fourier, United States). The scanning wavelengths varied from 400 to 4000/cm in the test 23 . The D301 resin backbone is a cross-linked polymer formed by the copolymerization of styrene and acrylic acid.…”

Adsorption of Hexavalent Chromium from an Aqueous Phase by Hydroxypropyl Methylcellulose Modified with Diethylenetriamine

“…The effect of temperature on the adsorption process was studied by using the adsorption experiments at different temperatures. − In this work, the batch thermodynamic experiments were studied between 298 and 328 K, and the following equations can be utilized to compute the thermodynamic parameters for adsorbing hexavalent chromium ions. where C e (mg·L –1 ) denotes the equilibrium concentration of hexavalent chromium ions. K d represents the equilibrium constant and Q ads (mg·g –1 ) is the loading capacity of MHPMC at equilibrium.…”