Toxic Heavy Metal Ionsremoval From Wastewater Bynano-Magnetite: Case Study Nile River Water

Abstract

NANO-MAGNETITE was used as an eco-friendly sorbent (without the usage of surfactants during the synthesis) for removing Pb(II), Cd(II) and Cr(III) from water and wastewater. A single 7 nm cubic phase for magnetite was ascertained by X-Rays diffraction (XRD) and high resolution transmission electron microscope (HRTEM).Field emission scanning electron microscopy (FESEM) image showed the agglomeration of magnetite particles upon adsorption. The Langmuir isotherm was used to estimate the maximum adsorption capacities of 576.4, 144.3 and 301.0 mg/g for Pb(II), Cd(II) and Cr(III), respectively.The adsorption mechanism followed a pseudo-second order kinetics.The studied competing cations and anions showed minor effects on the rate of adsorption.Magnetite with high adsorption ability adsorbed Pb(II), Cd(II) and Cr(III) from a ternary mixture as effectively as from their individual solutions. The presented sorbent can be regenerated by 1% HNO 3 with a recovery percent of 91.4 % and reused with an adsorption efficiency of 84.1 % compared to the freshly prepared magnetite. As an example of application, the nano-magnetite was used to decontaminate river water-samples from lead ions.

The Sorption Performance of Cetyl Trimethyl Ammonium Bromide-Capped La0.9Sr0.1FeO3 Perovskite for Organic Pollutants from Industrial Processes

“…Adsorption data were fitted to Langmuir and Freundlich isotherms to deduce the mechanism of adsorption and to estimate the maximum adsorption capacity, q m , of CTAB-capped La 0.9 Sr 0.1 FeO 3 for CR dye. Langmuir and Freundlich isotherms can be expressed by the following equations, respectively [35,[45][46][47][48]:…”

“…The removal % continued to increase with the temperature increase. Standard enthalpy and entropy changes, ΔH o and ΔS°, therefore, can be calculated by constructing the transition-state plot, according to the transition-state equation [35,[45][46][47][48]:…”

Exploring Metal Ion Adsorption and Antifungal Properties of Carbon‐Coated Magnetite Composite

“…Various materials and methods have been tested to purify the water from toxic species . Metal nanoparticles have been found quite efficient in this field because of their very high specific surface area, minimal environmental impact, low solubility and in addition no secondary pollution have been reported upon their use as adsorbents for heavy metal ion removal . Nanoparticles of different metals have been successfully applied for the treatment of wastewater .…”

Synthesis of a MnO2/multiwalled carbon nanotube nanocomposite and its application as a sorbent for removing Cu2+ ions from aqueous media

“…Carbon nanotubes (CNTs), nano‐oxides/nanometals, nanoactive powder, nanocomposites, … are very common sorbents for removing dyes and ions from the aqueous media. It is worthwhile to mention that the very small quantities of some ions such as Cl − , I − , Na + , K + , Zn 2+ , Cu 2+ , Sr 2+ … are required for the health of human bodies, but their consumption in large quantities cause poisoning and sometimes cause cancer, nervous immune system disorder, and in the several cases cause death …”

“…It is worthwhile to mention that the very small quantities of some ions such as Cl − , I − , Na + , K + , Zn 2+ , Cu 2+ , Sr 2+ … are required for the health of human bodies, but their consumption in large quantities cause poisoning and sometimes cause cancer, nervous immune system disorder, and in the several cases cause death. [1][2][3][4][5][6][7][8] 2 | EXPERIMENTAL…”