蒙脱石对溶液中镍和铜的吸附特性研究

采用镍和铜作为溶液中的吸附质,探讨了蒙脱石对这2种重金属的吸附性能。通过实验研究了p H值、吸附剂用量、反应时间、浓度等因素对吸附Ni2+和Cu2+的影响。根据实验结果可知,蒙脱石对金属离子的吸附效率随溶液p H值、吸附剂用量、反应时间的增加而增加,但随着金属离子浓度的增加而降低。吸附动力学研究表明,蒙脱石对Ni2+和Cu2+的吸附过程符合准2级动力学模型。

This research adopts the nickel and copper as adsorbate in the solution and discusses on the adsorption properties for heavy metals. The pH, the dosage of bentonite, reaction time, concentration of heavy metal ions are studied through experiments on the adsorption of Ni and Cu The experimental results indicate that adsorption efficiency was increased with increasing pH, the dosage of bentonite and reaction time, but decreased with increasing concentration of heavy metal ions. Adsorption kinetics reveals that sorption process can apply to pseudo-second-order kinetic model.