赤泥与13X沸石混合使用去除废水中砷

对福建沙县钾长石粉合成的13X沸石及其与取自山东铝业公司的赤泥混合使用时除砷的效果和适宜条件进行实验。结果表明，以单一的13X沸石为吸附剂时，改变沸石用量和溶液的酸度均不能有效去除砷；赤泥和沸石混合使用时对低浓度砷（〈5mg／L）具有良好的去除效果。适宜的吸附条件为赤泥用量2g／L，沸石用量1．5g／L，pH值约为8，平衡时间1h。实验表明，赤泥在混合吸附剂除砷过程中起着重要的作用，沸石与赤泥的合理混合使用，对于含砷重金属废水处理具有重要意义。对可能的机理进行了探讨。

Dearsenication Effects of 13X Zeolite Mixed with Red Mud

The dearsenication effects and optimal conditions of 13X zeolite prepared of potassium feldspar powder from Sha County,Fujian Province, mixed with red mud from Shandong Aluminium Industry were studied.The results show that the 13X zeolite,when used alone as an adsorbent,has a poor dearsenication effect.However,it has a strong dearsenication effect for the samples with arsenic lower than 5 mg/L when mixed with red mud.Optimal removal condition is 2 g/L of red mud+1.5 g/L of zeolite at pH 8 with equilibrium time of 1 h.The results also(indicate) that red mud plays an important role in dearsenication by mixed adsorbent and that the mixed adsorbent has a bright application prospect in treatment of waste waters with arsenic and heavy metals.The possible mechanism of dearsenication effects was also discussed.