Patent ID: 8551617

Claim:
A sorbent material comprising: a carbon substrate having a surface area of approximately 100 m 2 or greater per gram of the carbon substrate; and ferrite having a composition selected from the group consisting of magnetite (Fe 3 O 4 ), copper ferrite (Fe 2 O 3 .CuO), nickel ferrite (Fe 2 O 3 .NiO), zinc ferrite (Fe 2 O 3 .ZnO), cobalt ferrite (Fe 2 O 3 .CoO), copper-nickel ferrite (Fe 2 O 3 .Cu x Ni y O) and combinations thereof, wherein the ferrite does not contain manganese, wherein the ferrite has a particle size ranging from 10 Å to 300 Å and a particle size distribution so that ferrite particles have a standard deviation from a mean diameter that does not exceed 20% of the mean diameter, wherein the ferrite is present on the carbon substrate in amounts ranging from 5 wt. % to 25 wt. %, wherein the carbon substrate having the ferrite attached thereto is paramagnetic having a positive magnetic susceptibility, wherein the positive magnetic susceptibility is greater than +1×10 −6 .