Ce/Zr/Al类水滑石的合成、表征及其吸附性能研究

摘要

本研究对Ce/Zr/Al 三元类水滑石材料去除微囊藻毒素( MC)的潜在应用进行了探索。采用共沉淀法合成了碳酸根型Ce/Zr/Al 三元类水滑石,通过XRD、IR等手段对样品进行了测试和表征。合成的类水滑石用于吸附MC,并详细研究了其对MC的吸附性能。结果显示,控制反应条件为温度80℃,M3+/M4+摩尔投料比为1∶1,pH为8．5,合成的Ce/Zr/Al 三元类水滑石对MC具有较高的吸附性能,对微囊藻毒素LR( MC-LR)最大吸附量可达178μg/g,对MC-LR和微囊藻毒素RR( MC-RR)的吸附效率均大于70%,吸附性能明显高于硅胶等常用吸附剂。这些研究数据表明Ce/Zr/Al 三元类水滑石对去除水体中微囊藻毒素具有潜在的应用价值。%The present study explores the potential of Ce/Zr/Al Hydrotalcite-Like Compounds( HTLcs) for the removal of microcys-tin( MC) in environmental water. Carbonate pillared Ce/Zr/Al-HTLcs were synthesized by coprecipitation and characterized by XRD and IR. The absorption behavior of Ce/Zr/Al-HTLcs to microcystin were studied in detail. Results showed that the Ce/Zr/Al-HTLcs synthesised under the conditions of temperature 80℃,M3+/M4+ molar ratio 1∶1 and pH 8. 5 have good adsorption performance to microcystin. Under the optimum conditions,the maximum adsorption amount of microcystin-LR( MC-LR) by as-synthesised Ce/Zr/Al-HTLcs was as high as 178 μg/g. And the adsorption efficiency of both MC-LR and microcystin-RR( MC-RR) were higher than 70%. Compared with silica gel and activated carbon,Ce/Zr/Al-HTLcs has better adsorption performance. The results showed in this study suggested that the Ce/Zr/Al-HTLcs have potential application value for the removal of microcystin in environmental water.