While working with ionic liquids based on mineral acids, such as hydrogen sulphates, it was observed that Zn metal would react to form zinc sulphate.
From the sciencedaily.com
As a result, the levels of waterborne aluminium, zinc, copper, sulphate and lead all rose significantly.
From the newscientist.com
Banfield found ZnS in the form of a mineral called sphalerite in an abandoned zinc mine in Wisconsin four years ago, a product of sulphate-reducing bacteria.
From the sciencedaily.com
These operations make Penoles the world's largest producer of refined silver, metallic bismuth and sodium sulphate, and a leader in Latin America in refined gold, lead and zinc.