The method 1, wherein the free radical depolymerization is carried out by adding to the native EPS a solution of an oxidizing agent selected from the group consisting of peroxides and peracides, in the presence of {HEAD ~ a metal catalyst} selected from {TAIL ~ the group} consisting of Cu2+, Fe2+, Cr3+ and Cr2O7 2− 
selected from
The method 1 , wherein the free radical depolymerization is carried out by adding to the native EPS a solution of an oxidizing agent selected from the group consisting of peroxides and peracides , in the presence of { HEAD ~ a metal catalyst } selected from { TAIL ~ the group } consisting of Cu2 + , Fe2 + , Cr3 + and Cr2O7 2−
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 OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH