REMOVAL OF METAL IMPURITIES FROM CUTTING SLURRY WASTE USING A MODIFIED ELECTROKINETIC SYSTEM

Metal removal is an important step in recycling silicon and silicon carbide from cutting slurry waste. This study uses a modified electrokinetic system in which an extended solution region is inserted between the cathode and the waste specimen to remove metal from cutting slurry waste. In this arrangement, the metals are transported out of the specimen and precipitated in the extended re;ion instead of the waste specimen. Analytical results show hat the residual iron and copper in the waste decreased to 0.48 wt% and 0.11 wt %, respectively, after applying 1 V/cm for 60 hr. The average removal efficiencies of iron and copper were 91% and 86%, respectively. The metal removal rate can be improved by using the modified electrokinetic system.