Abstract
The thermal plasma inflight processing of electroplating sludge was investigated. Elimination of the heavy metals chromium, nickel, copper, and zinc from the sludge and conversion of the residual sludge into inert slag were achieved. The thermal plasma inflight treatment of the sludge was accomplished with various plasma gas compositions and different specific energies. Heavy metals in the form of ferrite/chromite [(Ni,Zn,Fe)(Fe,Cr)/sub 2/O/sub 4/] were identified by X-ray diffraction. DC plasma experiments revealed that N/sub 2/-O/sub 2/ plasma yielded the highest elimination rate of heavy metals for the given experimental conditions. The influence of the heat transfer rate on the elimination rate of heavy metals was investigated by comparing results from DC and RF plasma experiments. Except for Ni, leaching of heavy metals from deposits prepared by H/sub 2/ plasma treatment was minimal.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: 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.