Cu(II) enhances the NDMA removal.
Cu(II) enhances the formation of UDMH and DMA.
Catalytic hydrogenation is proposed as the mechanism of NDMA reduction.
Cu(OH)2 enhances NDMA reduction in the Fe/Cu(II) system.
Cu2O and Cu(OH)2 enhance NDMA reduction in the Zn/Cu(II) system.