Making gold green: New non-toxic method for mining gold
Tuesday, May 14, 2013 - 12:30
in Physics & Chemistry
Scientists have struck gold in the laboratory. They have discovered an inexpensive and environmentally benign method that uses simple cornstarch -- instead of cyanide -- to isolate gold from raw materials in a selective manner. This green method extracts gold from crude sources and leaves behind other metals that are often found mixed together with the crude gold.