A study Cu (II) Extraction from wastewater by Ionic Liquid Aliquat 336 under assistance. EDTA

Under the assistance of EDTA, the extraction property of hydrogen ionic liquid aliquat 336 (methyl trout ammonium chloride) on Cu (II) Was studied. The results showold that, when the volume ratio of aliquat 336 to aqueous solution was 1:5.,The initial mass concentration of Cu (II) Was 600 mg/L, the pH value was 4, adding equilibrium EDTA could enable the extraction rate of Cu (II) From 5.0% to 88.7%, which indicated that, the presence of completing agent EDTA could significantly improved the extraction rate of Cu (II) In the simulated water. The optimal extraction condition was as follows: the mass ratio of EDTA to Cu (II) Was 1.0, the value of V Ils :V AQ Was 1:5, the pH value was 4, the temperature was 25. Under the above referral-tion, the removal rate of Cu (II) From the water recovered 88.7%. aliquat 336 can be recycled for many times, the extraction rate still remains above 80% even it has been reclaimed for 4 times.