Electroremediation of heavy metals in sewage sludge

Brazilian Journal of Chemical Engineering

C. Elicker¹  P. J. Sanches Filho¹  K. R. L. Castagno¹ 

[1] ,Instituto Federal Sul-Rio-Grandense Department of Management and Environmental Sanitation Pelotas RS ,Brazil

关键词: Metals;    Sewage sludge;    Electrokinetic remediation;    Atomic absorption;   

DOI  :  10.1590/0104-6632.20140312s00002394

来源: SciELO

【 摘 要 】

This paper presents the application of electrokinetic remediation in the treatment of sludge in a sewage treatment station. The study consisted of, in a first step, the characterization of physicochemical parameters of sludge and, in a second step, the implementation of the electrokinetic remediation technique. The concentrations of Cu, Cr, Pb and Zn in sludge samples, before and after the experiment, were determined by atomic absorption spectroscopy. After 40 hours of experiment, considering an electrolyte flow-rate of 1.34 L.h-1 at a voltage of 20 V, the removal rate of all the metals accompanied was over 50%; the highest removal efficiency was for Pb, with 72.49%. The results show the feasibility of using the electrochemical technique of electrokinetic remediation for metal removal from a sludge sewage treatment station.

【 授权许可】

CC BY   
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