Metformin-graphene oxide/alginate beads for the removal of toxic lead ions from aqueous media; kinetic and equilibrium studies

被引：6

作者：

Abboud, Ayad Sami ^{[1
,2
]}

Ghaffarinejad, Ali ^{[3
,4
]}

Mollahosseini, Afsaneh ^{[1
]}

机构：

[1] Iran Univ Sci & Technol, Dept Chem, Res Lab Spect & Micro & Nano Extract, POB 16846-11367, Tehran, Iran

[2] Iran Univ Sci & Technol IUST, Fac Chem, Res Lab Real Samples Anal, Tehran 1684613114, Iran

[3] Iran Univ Sci & Technol IUST, Electroanalyt Chem Res Ctr, Tehran, Iran

[4] Karbala Governorate, Karbala, Iraq

来源：

ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY | 2022年 / 41卷 / 05期

关键词：

alginate; graphene oxide; lead ions adsorption; metformin; OXIDE NANOCOMPOSITE; CALCIUM ALGINATE; COMPOSITE; WATER; ADSORPTION; PB(II); PHOTOCATALYSIS; PERFORMANCE; EXTRACTION; ADSORBENT;

D O I：

10.1002/ep.13860

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

In this study, the Met-GO@Alg as a novel adsorbent was composed of metformin (Met), graphene oxide (GO), alginate beads (Alg) for removal of lead ions from aqueous media. The adsorbent material was characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDX) techniques. The effect of solution pH)5(, adsorbent dosage)20 mg(, contact time)90 min(, temperature and co-existing ions were studied and optimized. The Pb2+ adsorption nature and mechanism were adopted with various isotherms, kinetics, and thermodynamic models. Hence, the adsorption kinetic process fits with the pseudo-second-order model (R-2 > 0.97) with 95% removal efficiency at 90 min. The adsorption isotherm is well fit to the Freundlich model (R-2 > 0.99) with the maximum adsorption capacity of 370 mg. g(-1). Overall, Met-GO@Alg nanocomposite revealed good efficiency, applicability, and five times reusability.

引用

页数：11

共 53 条

[1] Calcium Alginate-Caged Multiwalled Carbon Nanotubes Dispersive Microsolid Phase Extraction Combined With Gas Chromatography-Flame Ionization Detection for the Determination of Polycyclic Aromatic Hydrocarbons in Water Samples [J].