Manometer magnetofluid and application thereof to purification of pollutants

The invention discloses a nanometer magnetofluid which is a stable colloidal liquid formed by mixing a nanometer magnetic material with a core-shell structure, a surfactant and a base carrier liquid. The nanometer magnetofluid disclosed by the invention is applied to purification of wastewater and waste gas, and is placed in a controllable magnetic field to treat the wastewater and the waste gas, and is capable of further completing purification of the wastewater and the waste gas and the product separation under the catalysis action or adsorption action of the nanometer magnetofluid by controlling the size and the direction of the magnetic field. By adopting the nanometer magnetofluid, the defect that a common liquid phase catalyst is difficultly separated and recovered can be changed, the adsorption efficiency is improved, the desorption and the regeneration of an adsorbent become relatively easy, the purpose of recycling is achieved while the pollutants are effectively removed; by adopting the nanometer magnetofluid, the control of the pollutants of the waste gas and the wastewater can be realized, and thus an energy-saving, environment-friendly and economical method is obtained.