Method of recycling metal ions with super-paramagnetic composite and system thereof

The present invention relates to a novel super-paramagnetic composite, which comprises a super paramagnetic particle and a polymer which is covered on the surface of the super paramagnetic particle and capable of attaching of metal ions. The present invention also discloses a novel method of synthesizing super-paramagnetic composite, which comprises preparing a mixed solution of water and organic solvents; precipitating by adding the mixed solution with metal ions solution and an alkaline solution for forming super paramagnetic seed crystals, then adding monomers with ligands for absorbing metal ions and initiator to the super-paramagnetic seed crystals, making polymers aggregate on the surface of seed crystals and form superparamagnetic composite. The super-paramagnetic composite of the present invention may apply for metal ion separating and recycling system, it recycles the metal ions of the waste water effectively and rapidly by the high surface activity and the reaction mechanism of the super-paramagnetic composite.