MTM Critical Metals (ASX:MTM) recently announced it retrieved gallium from e-waste using a proprietary acid-free system – and now it reports it’s done the same thing for gold. The company utilises a technology called flash joule heating (FJH) which effectively sees e-waste recycling take place without the need to use acids. The company also points to a heavy emissions load created by standard smelting processes that further adds to atmospheric greenhouse gas accumulation. While it’s not clear how much gold was actually produced by weight in MTM’s Thursday communiqué, the company reported a “70…