交联粘土矿物吸附特性研究 (Ⅶ)——铝锆交联膨润土对废水中铬的吸附

Study on the adsorption of crosslinked clay minerals(Ⅶ): adsorption of zirconiumaluminium crosslinked bentonite for chromium in wastewa ter

比较了不同交联膨润土对废水中铬的吸附 .结果表明 :铝锆交联膨润土对铬有较好的吸附性能 .当吸附时间为 30 min,废水 p H=2 .5～ 3.5,每升水中吸附剂用量为 1 2 g/L时 ,铝锆吸附剂对 Cr6 +的吸附容量为2 .2 1 3mg/g,吸附效率接近 1 0 0 % .

Adsorptions of different crosslinked bento nites for Cr 6+ in wastewater are compared in this paper . The resu lts show that a adsorbent containing zirconiumaluminium has highe r for Cr 6+. When 12 g zirconiumalumininium is added in 1 L wast ewater and adsorptive time is 30 min at pH=2.5~3.5 ,the adsorbility and absorption rate of adsorbent are 2. 213 mg/g and 100 % for Cr 6+ in wastewater.