活性炭负载锆柱撑蒙脱石对丁基黄药的吸附性能

Adsorption Performance of Butyl Xanthate with Activated Carbon Supported Zirconium Pillared Montmorillonite

通过稀溶液法将聚合阳离子Zr^(4+)柱撑进入提纯钠基蒙脱石(Na-mt)层间合成锆柱撑蒙脱石(Zr-pmtn),再通过浸渍法制备活性炭负载锆柱撑蒙脱石(C/Zr-pmtn)。对C/Zr-pmtn进行的XRD分析表明:Zr-pmtn和活性炭以2∶1的质量比制备的C/Zr-pmtn具有较大的晶面间距。采用C/Zr-pmtn对丁基黄药进行吸附研究,结果表明:1向初始pH=3、浓度为20 mg/L的100 m L丁基黄药溶液中投加0.1 g的C/Zr-pmtn,20℃下吸附50 min,对丁基黄药的吸附量为19.38 mg/g,丁基黄药去除率达99.72%。2C/Zr-pmtn对丁基黄药的吸附符合二级动力学方程和Langmuir等温模型,C/Zr-pmtn对丁基黄药的最大吸附量达72.098 mg/g。可见,C/Zr-pmtn是选矿废水中丁基黄药的高效吸附剂。

The zirconium pillared montmorillonite( Zr-pmtn) has been synthesized by polymerization cationic Zr^(4+) pillared into the purified Na-montmorillonite interlayer through the dilute solution method,then synthesized activated carbon( C)supported Zr-pmtn material( C/Zr-pmtn) by the impregnation method. The XRD analysis shows that the prepared C/Zr-pmtn materials with a larger basal spacing through Zr-pmtn and activated carbon to 2 ∶ 1 mass ratio.Adsorption of butyl xanthate by C/Zr-pmtn materials was investigated.The results show that under the addition of 0.1 g C/Zr-pmtn added to 100 m L butyl xanthate solution at 20 ℃,initial pH = 3 and concentration of 20 mg/L for 50 min,adsorption capacity of butyl xanthate is 19.38mg/g,the removal rate of butyl xanthate is 99.72 %.The adsorption kinetics follows to pseudo-second-order equation and Langmuir isotherm model,maximum adsorption capacity of C/Zr-pmt onto butyl xanthate is 72.098 mg/g.It can be seen that C/Zrpmtn is a high effective adsorbent for butyl xanthate in beneficiation wastewater.