BacTech is expanding the use of its patented BACOX bioleaching technology to the processing of toxic, arsenic-laden mine tailings. An added benefit of bioleaching, in addition to stabilizing arsenic and capturing heavy metals, is that it oxidizes sulphides in the tailings, thereby eliminating a major source of acid mine drainage. The technology also recovers precious and base metals from the tailings for sale to market. In other words, bioleaching is an environmental clean up solution that also creates a profit.