Abstract
An enhanced EK (electrokinetic) process for the removal of heavy metals from an electroplating sludge was performed by adding electrolytes in electrode chambers. The EK experiments were conducted under a constant cell potential (32 V) for 5 days using tap water (TW) and aqueous solution containing sodium dodecylsulfate (SDS) and citric acid (CA) as electrolytes. The results indicated the removal efficiency of heavy metals using TW and aqueous solution containing SDS and CA as electrolytes were 20–51%, 26–65% and 34–69%, respectively, the highest metal removal performance was found using CA as electrolyte. And the removal efficiency of the five metals from sludge in all the EK experiments was Cr > Zn > Ni > Cu > Pb. And sequential extraction analysis revealed that the binding forms of heavy metals with sludge highly depended on the electrolytes, changed from the most difficult extraction type (residual form) to the easier extraction types (soluble, exchangeable, sorbed, sulfate and carbonate forms) after electrokinetic process.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
