【摘要】 沸石吸附去除水中金属离子具有高效、可重复利用的优点。对比研究了ZSM-5、Y、Beta这3种沸石对铅(Ⅱ)的吸附性能,分别考察了沸石用量、pH、吸附时间、铅(Ⅱ)的初始浓度对铅(Ⅱ)的吸附去除率的影响。结果表明,在相同条件下,Beta沸石比其他2种沸石具有有更好的铅(Ⅱ)吸附性能;当吸附剂质量浓度为4 g/L、pH=6、吸附时间为140 min时,Beta沸石的铅(Ⅱ)吸附率可达94.4%。3种沸石的平衡吸附量与吸附平衡质量浓度之间的关系较好地符合Freundlich和Langmuir等温方程所描述的规律。更多还原

【Abstract】 It is a highly effective and reusable method for removal of metal ions in water using zeolites as absorbents.Adsorption performances of ZSM-5,Y,and Beta three different zeolites on Pb2+ were comparatively studied.Effects of zeolite dosage,pH,adsorbing time,and initial Pb2+ concentration on the adsorbing ratio of Pb2+ were investigated,respectively.Results showed Beta zeolite performed the best under the same conditions.A 94.4% of Pb2+ adsorbing ratio was obtained at the conditions of 4 g/L of adsorbent dosage,6 of pH,and 140 min of adsorbing time.The relatingships between the absorbing capacity and equilibrium mass concentration for the three zeolites were all in good accordance with the isothermal adsorption equations of Freundlich and Langmuir,respectively.更多还原