Pulsed Electrochemical Deposited Nano-Iron for Water Treatment

Éva Fazakas,Richárd Bak,Lajos K Varga,Mátyás-Karácsony Zsuzsanna

doi:10.4236/ajac.2017.83014

Éva Fazakas, Richárd Bak + Show 2 more

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https://doi.org/10.4236/ajac.2017.83014

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Abstract

The application of nanotechnology in drinking water treatment and pollution cleanup is promising, as demonstrated by a number of field-based (pilot and full scale) and bench scale studies. In recent years, the use of zero-valent iron (ZVI) for the treatment of toxic contaminants in groundwater and wastewater has received wide attention and encouraging treatment efficiencies have been documented. In this review, nanoscale iron was prepared by pulse electrodeposition of nano iron by chemical reduction of iron chloride and iron sulfate. Our research focuses on iron nanoparticles preparation and its use for aqueous Cr(VI) reduction. The Cr(VI) reduction by the nFe0 prepared by electrochemical and blasting method at neutral pH were carried. The results show that blasting-nFe0 show lower reaction than the electrochemical-nFe0. It is because the blasting-nFe0 surface contains more Fe2O3 than the other one.

Highlights

Chromium is widely used in metallurgical, electroplating, production of paints and pigments, tanning, wood preservation [1] [2] [3], etc., thereby commonly identified in waters
Nanoscale iron was prepared by pulse electrodeposition of nano iron by chemical reduction of iron chloride and iron sulfate
The results show that blasting-nFe0 show lower reaction than the electrochemical-nFe0

Summary

Introduction

Chromium is widely used in metallurgical, electroplating, production of paints and pigments, tanning, wood preservation [1] [2] [3], etc., thereby commonly identified in waters. Cr(VI) and Cr(III) species, are present in aqueous media. The former is highly toxic and carcinogenic to human and animals, while the latter is generally non-toxic [4] [5] [6]. Nano iron powders have been used in permeable reactive barriers for aqueous Cr(VI) reduction in contaminated groundwater. The reduction of the Cr(VI) to the Cr(III) is of environmental interest. Much work has been focused on the cleanup of Cr(VI)-contaminated waters by various reducing rea-

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