{HEAD ~ The method} 8 wherein said reducing agent is selected from the group consisting of activated carbon, graphite powders, charcoal powders, ash powders, oil, paraffin, tar, {TAIL ~ pitch}, and mixtures thereof 
{ HEAD ~ The method } 8 wherein said reducing agent is selected from the group consisting of activated carbon , graphite powders , charcoal powders , ash powders , oil , paraffin , tar , { TAIL ~ pitch } , and mixtures thereof
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH