Use of magnetic solid-phase extraction agent in treatment of dye wastewater

The invention discloses use of a magnetic solid-phase extraction agent in treatment of dye wastewater. An adsorbent is synthesized by a method in literature report. The method comprises the step of performing heating and refluxing methods of a water bath on nano Fe3O4, copper acetate and terephthalic acid taken as materials to obtain the solid-phase extraction agent. A synthetic solid-phase extraction agent is added to the dye wastewater, wherein the adding amount is 1.0g/L; and the dye removal rate is 92-99% after oscillation is carried out for 20-40 minutes. The solid-phase extraction agent is suitable for rapid treatment of the dye wastewater; other reagents do not need to adjust after being fed. Thus, the method is simple; the adsorbent still can achieve 90-95% after being used for five times in cycle; 0.1mg/L of dye wastewater is gathered; the solid-phase extraction agent is high in absorbance and enrichment power after being analyzed by a proper analytical agent, and suitable for determining trace amoun