采用内蒙赤峰膨润土进行焙烧改性,考查了改性膨润土对水溶液中Cd2+的吸附性能.试验表明:钙基膨润土经450℃焙烧2.5 h后,在pH值=5,吸附时间为25 min时,对金属Cd2+离子的饱和吸附效率达83％；焙烧前后XRD分析显示膨润土保持了完善的层间结构和化学结构.%The calcined bentonite was prepared by sintering general bentonite from Chifen in Inner Mongolia.Its adsorption performance to Cd2+ in the aqueous solution has been investigated.The results showed that the Ca-bentonite burned at 450 ℃ for 2.5 h has a saturated adsorption efficiency of 83 ％ after an adsorption to Cd2+ for 25 min at a pH value of 5.The XRD and FT-IR results indicated that the bentonite maintained perfect interlayer and chemical structures before and after calcination.
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