天然沸石的改性及其吸附Pb~(2+);Cu~(2+)的研究

以天然沸石为原料,结合废水处理应用中对吸附材料的要求,采用酸、碱、盐对沸石进行了改性;并利用改性沸石进行了去除溶液中Pb2+,Cu2+的方法、效果、影响因素和吸附机理的研究.结果表明,NaOH改性的沸石对Pb2+,Cu2+的吸附能力大幅度提高;随着初始浓度的增加,沸石的吸附容量也增加;改性沸石对Pb2+,Cu2+的吸附很快,在较短的时间内即可达到平衡;溶液的pH值越高越有利于沸石吸附Pb2+,Cu2+.

Modification of Natural Zeolite and Its Adsorption of Pb2+ and Ca2 +

The natural zeolite was used as the experimental material, in combination the requirements of adsorption materials used to treat waster water, the natural zeolite was modified by acid, alkali and salt. The method, removal efficiency, influencing factors and adsorption mechanism for removing of heavy metal ion, such as Pb²⁺ and Cu²⁺, from solution using modified zeolite were also studied. The results showed that adsorption capacity of Pb²⁺ and Cu²⁺ in zeolite modified by NaOH can be improved greatly. The adsorption capacity of Pb²⁺ and Cu²⁺ in modified zeolite rises with the increase of initial concentration. Modified zeolite adsorbs Pb²⁺ and Cu²⁺ very quickly, and the equilibrium can be reached in shorter time. The higher pH of heavy metal ion solution the better it is for the adsorption of Pb²⁺ and Cu²⁺.