Scrap zero-valent aluminum can be utilized for Cr(VI) reduction.
Adding oxalate can significantly enhance the reduction of Cr(VI).
The enhanced Cr(VI) reduction was induced by the affinity of oxalate to Cr(VI).
Real Cr(VI) effluent can be successfully detoxified in SZVAl/oxalate system.
An excellent example of “waste control by waste” strategy was provided.