Quantitative gold and copper leaching was observed within 5 hours of leaching at 25 ºC (Fig. ). The leach solution was then filtered and the filter cake was washed with water (1.5 L) before poly-1 was added in several portions to quench the leach solution and bind gold. A total of 250 g of poly-1 was added over this process, with regular monitoring of the gold and copper concentrations by AAS. The sorption process was stopped when >97% of the gold had been bound by the polymer (Fig. ).