山东主要产地沸石岩的重金属阳离子交换性能

HEAVY METAL ION EXCHANGE PROPERTIES OF MAJOR ZEOLITE ROCKS IN SHANDONG

本文在概述了山东几处主要产地沸石岩的基本特征之后,着重论述了沸石岩的交换容量和对Pb、Hg、Zn、Cd、Cr等重金属阳离子的交换吸附效果;介质酸度和温度,沸石岩粒度和改型、交换吸附时间和液体流量等因素对重金属阳离子交换吸附效果的影响。讨论了沸石岩脱除水体中重金属阳离子的机制和适宜条件;说明Na型沸石岩对水体中重金属阳离子交换吸附效果良好,应用前景广阔的交换吸附剂。

First, the author outlined the basic characteristic of some major zeolitic rocks in Shandong and then emphatically discussed on the exchange capacity of zeolite rocks and their effectiveness of exchange-adsorption of heavy metal (Pb, Hg, Zn, Cd, Cr, etc.) ions, and the influence of such factors as acidity and temperature of media, grain size and modification of the zeoltic rocks, exchange-adsorption time and flow rate of liquid on the results of exchange-adsorption of heavy metal ions. The mechanism and favourable conditions for the zeolite rocks to remove heavy metal ions from water were also discussed. Na-zeolite rocks is proved to be an effective exchange-adsorbent for heavy metal ions in water with promising application prospects.