摘 要海泡石作为一种新型的优良吸附材料具有的特殊结构特征为其吸附性能提供了有利条件。但由于天然海泡石的孔道窄、表面的酸性小、对海泡石吸附率造成影响，所以要想达到较高吸附量，就需要对海泡石进行活化改性处理。以重铬酸钾法测定 CODCr及其去除率来判定分别采用不同时长进行酸、热活化处理后的海泡石吸附性能的改变。实验结果表明，酸、热活化均提升海泡石的吸附性能，且酸活化处理的海泡石 CODCr去除率高于热活化处理的海泡石 CODCr去除率。最终得出结论：热活化最佳条件为 250℃的温度下活化 2.5h；酸活化的最佳条件为室温下，用 7％硫酸活化 3h。如将活化后的海泡石运用在污水处理中，可加快絮凝-沉降阶段的用时，且吸附后的海泡石经高温处理可除去表面微粒，实现海泡石的回收再利用。关键词：海泡石；吸附性能；酸活化；热活化；CODCrAbstractAs a new type of excellent adsorption material, sepiolite has special structural characteristics that provide favorable conditions for its adsorption performance. However, since the channel of natural sepiolite is narrow, the acidity of the surface is small, and its adsorption rate is affected, in order to achieve a higher adsorption amount, it is necessary to activate and modify the sepiolite.In this experiment, CODCr and its removal rate were determined by potassium dichromate method to determine the change of adsorption properties of sepiolite after acid and thermal activation treatment for different time periods. The experimental results showed that both acid and thermal activation improved the adsorption performance of sepiolite, and the CODCr removal rate of sepiolite treated by acid activation was higher than that of sepiolite treated by thermal activation. Finally, it was concluded that the optimal thermal activation condition was 2.5h at 250and the optimal conditions for acid℃ activation were 3h at room temperature with 7% sulfuric acid.If the activated sepiolite is used in sewage treatment, the...
