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Treatment of electroplating wastewater containing Cu^2^+, Zn^2^+ and Cr(VI) by electrocoagulation [An article from: Journal of Hazardous Materials]
Book Details
PublisherElsevier
ISBN / ASINB000RR145Q
ISBN-13978B000RR1450
AvailabilityAvailable for download now
Sales Rank99,999,999
MarketplaceUnited States 🇺🇸
Description
This digital document is a journal article from Journal of Hazardous Materials, published by Elsevier in 2004. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
The performance of electrocoagulation, with aluminium sacrificial anode, in the treatment of metal ions (Cu^2^+, Zn^2^+ and Cr(VI)) containing wastewater, has been investigated. Several working parameters, such as pH, current density and metal ion concentrations were studied in an attempt to achieve a higher removal capacity. Results obtained with synthetic wastewater revealed that the most effective removal capacities of studied metals could be achieved when the pH was kept between 4 and 8. In addition, the increase of current density, in the range 0.8-4.8Adm^-^2, enhanced the treatment rate without affecting the charge loading, required to reduce metal ion concentrations under the admissible legal levels. The removal rates of copper and zinc were found to be five times quicker than chromium because of a difference in the removal mechanisms. The process was successfully applied to the treatment of an electroplating wastewater where an effective reduction of (Cu^2^+, Zn^2^+ and Cr(VI)) concentrations under legal limits was obtained, just after 20min. The electrode and electricity consumptions were found to be 1gl^-^1 and 32Ahl^-^1, respectively. The method was found to be highly efficient and relatively fast compared to conventional existing techniques.
Description:
The performance of electrocoagulation, with aluminium sacrificial anode, in the treatment of metal ions (Cu^2^+, Zn^2^+ and Cr(VI)) containing wastewater, has been investigated. Several working parameters, such as pH, current density and metal ion concentrations were studied in an attempt to achieve a higher removal capacity. Results obtained with synthetic wastewater revealed that the most effective removal capacities of studied metals could be achieved when the pH was kept between 4 and 8. In addition, the increase of current density, in the range 0.8-4.8Adm^-^2, enhanced the treatment rate without affecting the charge loading, required to reduce metal ion concentrations under the admissible legal levels. The removal rates of copper and zinc were found to be five times quicker than chromium because of a difference in the removal mechanisms. The process was successfully applied to the treatment of an electroplating wastewater where an effective reduction of (Cu^2^+, Zn^2^+ and Cr(VI)) concentrations under legal limits was obtained, just after 20min. The electrode and electricity consumptions were found to be 1gl^-^1 and 32Ahl^-^1, respectively. The method was found to be highly efficient and relatively fast compared to conventional existing techniques.
