Removal of Hexavalent Chromium from Water by Modified Sponge Iron Particles and Insights into Mechanism

Overview

Journal Environ Sci Pollut Res Int

Publisher Springer

Specialties Environmental Health
Toxicology

Date 2018 Jul 6

PMID 29974439

Citations 3

Authors

Guilin Zhu

Junde Song

Weihong Dong

JingFeng Lu

Yan Wang

Weinan Jiang

Ping Guo

Affiliations

Soon will be listed here.

Abstract

Sponge iron particles modified with expanded graphite and Cu were used to purify solutions contaminated with aqueous Cr(VI). A removal mechanism that involved physical adsorption and a redox reaction is proposed. The reaction, which consisted of rapid adsorption, a desorption stage, and an adsorption-desorption equilibrium stage, corresponded to a first-order kinetic model. The properties of the adsorption materials before and after use were investigated by X-ray diffraction, scanning electron microscopy-energy-dispersive spectroscopy, Fourier-transform infrared spectroscopy, energy-dispersive X-ray fluorescence spectroscopy, and surface area measurements. Changes in the surface properties, e.g., attachment of material to the surface and filling of pores with Cr, were clearly observed. The Langmuir model best described Cr(VI) adsorption on the sponge iron and its modified particles. Removal efficiencies of 98.7, 98.8, and 100% were achieved in 7 h at a Cr(VI) dosage of 10 mg/L. Sponge iron particles are therefore potential adsorbents and after modification give good removal of Cr(VI) ions from contaminated water.

Citing Articles

Recent advances in hexavalent chromium removal from aqueous solutions by adsorptive methods.

E Pakade V, Tavengwa N, Madikizela L RSC Adv. 2022; 9(45):26142-26164.

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The preparation of a novel iron/manganese binary oxide for the efficient removal of hexavalent chromium [Cr(vi)] from aqueous solutions.

Yang C, Ju T, Wang X, Ji Y, Yang C, Lv H RSC Adv. 2022; 10(18):10612-10623.

PMID: 35492911 PMC: 9050376. DOI: 10.1039/c9ra10558a.

Enhanced refractory organics removal by sponge iron-coupled microbe technology: performance and underlying mechanism analysis.

Li J, Wang Y, Xie H, Zhao W, Zhang L, Li J Bioprocess Biosyst Eng. 2021; 45(1):117-130.

PMID: 34617132 DOI: 10.1007/s00449-021-02645-0.

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