铁酸锰纳米材料吸附含Ni^(2+)电镀废水的性能研究

Adsorption performance of manganese ferrite nanomaterial on Ni^(2+)-containing electroplating wastewater

采用非表面活性剂水热法制备了铁酸锰(MnFe2O4)纳米材料吸附剂,研究了吸附时间、溶液pH和温度对MnFe2O4纳米材料吸附模拟含Ni 2+电镀废水和实际含Ni 2+电镀废水中重金属Ni 2+的吸附性能,并探讨了该材料的再生利用性能。结果表明,MnFe2O4纳米材料可有效吸附电镀废水中的Ni 2+,吸附平衡时间为600min。对20mg/L的模拟含Ni 2+电镀废水,投加4.5mg的的MnFe2O4纳米材料进行吸附处理,Ni 2+的吸附去除率高达98%左右;实际工程应用中,应保持电镀废水偏碱性、温度25℃;MnFe2O4纳米材料具有理想的再生利用性能,重复吸附5次后,吸附去除率仍可达82.24%,在实际废水处理中具有广阔的应用前景。

The manganese ferrite （MnFe2O4） nanomaterial was prepared by surfactant-free hydro-thermal method,and it was used as the adsorbent to treat the heavy metal of Ni2＋ from electroplating wastewater. Its adsorption performance were investigated using simulated electroplating wastewater and real electroplating wastewater containing Ni2＋ ,the effects of adsorption time, solution pH and temperature on the adsorption performance of MnFe2O4 and its recycle ability were researched. Results indicated that MnFe2O4 nanomaterial had good adsorption performance for the heavy metal of Ni2＋ in electroplating wastewater. The adsorption equilibrium time was 600 min and its remov- al efficiency reached about 98% when 4.5 mg MnFe2 O4 nanomaterial was used in 20 mg/L simulated wastewater. In the treatment of real industrial wastewater,the wastewater should keep in basicity and at room temperature （25 ℃）. MnFe2 O4 nanomaterial had ideal renewable adsorption properties,and its adsorption efficiency could reach 82.24% after 5 adsorptions,indicating broad application prospects in the practical wastewater treatment.