| 摘要 |
<p>A method for treating an aqueous waste stream containing a photoresist waste component. Under this process the pH of the waste stream is adjusted in a range from about 4.0 to about 6.0 and an additive is added to the waste stream in a concentration effective to separate a precipitant from the waste solution in the form of a non-sticky residue. The additive is selected from the group consisting of FeCl2, CuCl2, NH4Cl, AlCl3 and combinations thereof.</p> |
