Characterization of the removal of Chromium(VI) from groundwater by electrocoagulation

Shaima S. Hamdan; Muftah H. El-Naas

doi:10.1016/j.jiec.2013.11.006

Characterization of the removal of Chromium(VI) from groundwater by electrocoagulation

Shaima S. Hamdan, Muftah H. El-Naas

Department of Chemical & Petroleum

Research output: Contribution to journal › Article › peer-review

105 Citations (Scopus)

Abstract

A batch electrocoagulation system has been evaluated for the removal of Cr(VI) from brackish groundwater under different operating conditions. The influence of electrode type, applied current density, initial pH, initial chromium concentration, conductivity and temperature were evaluated. The experimental results indicated that chromium removal increased with increasing the applied current density and conductivity. The efficiency of different electrode arrangements (iron, aluminum) was also assessed, and indicated that Fe-Fe electrode pair was the most efficient arrangement and was able to achieve 100% Cr removal at an electrocoagulation time of 5min, a current density of 7.94mA/cm², and pH of 8 at room temperature 25°C. The generated sludge for the iron electrodes was characterized using EDS, X-ray fluorescence (XRF) and FE-SEM. The analysis confirmed the formation and precipitation of Fe(OH)₃ and Cr(OH)₃ as solids. Overall, the study affirmed that electrocoagulation is a reliable technique for the purification of groundwater with an estimated energy consumption of 0.6kWh/m³.

Original language	English
Pages (from-to)	2775-2781
Number of pages	7
Journal	Journal of Industrial and Engineering Chemistry
Volume	20
Issue number	5
DOIs	https://doi.org/10.1016/j.jiec.2013.11.006
Publication status	Published - Sept 25 2014

Keywords

Brackish water
Electrocoagulation
Groundwater
Hexavalent chromium
Sludge

ASJC Scopus subject areas

Chemical Engineering(all)

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.jiec.2013.11.006

Cite this

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title = "Characterization of the removal of Chromium(VI) from groundwater by electrocoagulation",

abstract = "A batch electrocoagulation system has been evaluated for the removal of Cr(VI) from brackish groundwater under different operating conditions. The influence of electrode type, applied current density, initial pH, initial chromium concentration, conductivity and temperature were evaluated. The experimental results indicated that chromium removal increased with increasing the applied current density and conductivity. The efficiency of different electrode arrangements (iron, aluminum) was also assessed, and indicated that Fe-Fe electrode pair was the most efficient arrangement and was able to achieve 100% Cr removal at an electrocoagulation time of 5min, a current density of 7.94mA/cm2, and pH of 8 at room temperature 25°C. The generated sludge for the iron electrodes was characterized using EDS, X-ray fluorescence (XRF) and FE-SEM. The analysis confirmed the formation and precipitation of Fe(OH)3 and Cr(OH)3 as solids. Overall, the study affirmed that electrocoagulation is a reliable technique for the purification of groundwater with an estimated energy consumption of 0.6kWh/m3.",

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author = "Hamdan, {Shaima S.} and El-Naas, {Muftah H.}",

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AU - Hamdan, Shaima S.

AU - El-Naas, Muftah H.

PY - 2014/9/25

Y1 - 2014/9/25

N2 - A batch electrocoagulation system has been evaluated for the removal of Cr(VI) from brackish groundwater under different operating conditions. The influence of electrode type, applied current density, initial pH, initial chromium concentration, conductivity and temperature were evaluated. The experimental results indicated that chromium removal increased with increasing the applied current density and conductivity. The efficiency of different electrode arrangements (iron, aluminum) was also assessed, and indicated that Fe-Fe electrode pair was the most efficient arrangement and was able to achieve 100% Cr removal at an electrocoagulation time of 5min, a current density of 7.94mA/cm2, and pH of 8 at room temperature 25°C. The generated sludge for the iron electrodes was characterized using EDS, X-ray fluorescence (XRF) and FE-SEM. The analysis confirmed the formation and precipitation of Fe(OH)3 and Cr(OH)3 as solids. Overall, the study affirmed that electrocoagulation is a reliable technique for the purification of groundwater with an estimated energy consumption of 0.6kWh/m3.

AB - A batch electrocoagulation system has been evaluated for the removal of Cr(VI) from brackish groundwater under different operating conditions. The influence of electrode type, applied current density, initial pH, initial chromium concentration, conductivity and temperature were evaluated. The experimental results indicated that chromium removal increased with increasing the applied current density and conductivity. The efficiency of different electrode arrangements (iron, aluminum) was also assessed, and indicated that Fe-Fe electrode pair was the most efficient arrangement and was able to achieve 100% Cr removal at an electrocoagulation time of 5min, a current density of 7.94mA/cm2, and pH of 8 at room temperature 25°C. The generated sludge for the iron electrodes was characterized using EDS, X-ray fluorescence (XRF) and FE-SEM. The analysis confirmed the formation and precipitation of Fe(OH)3 and Cr(OH)3 as solids. Overall, the study affirmed that electrocoagulation is a reliable technique for the purification of groundwater with an estimated energy consumption of 0.6kWh/m3.

KW - Brackish water

KW - Electrocoagulation

KW - Groundwater

KW - Hexavalent chromium

KW - Sludge

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JF - Journal of Industrial and Engineering Chemistry

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Characterization of the removal of Chromium(VI) from groundwater by electrocoagulation

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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