<prompt> Destroying of lead batteries releases all of the following contaminants except:ArsenicAntimonyLeadMercury  <response>: The battery scrap obtained from the breaking process is a mixture of several substances: metallic lead, lead oxide PbO, lead sulfate PbSO4 and other metals such as calcium Ca, copper Cu, antimony Sb, arsenic As, tin Sn and sometimes silver Ag. In order to isolate the metallic lead from this mixture, two methods may be applied: pyrometallurgical processes, also known as fusion-reduction methods, and hydrometallurgical processes, or electrolytic methods. It is also possible to combine the two and use a hybrid process. Ref : 