煤基聚苯胺对苯酚废水的吸附性能和机理研究  

Adsorption properties and mechanism of coal-based polyaniline to phenol wastewater

作　　者：刘转年[1] 邵华帆 韩晓刚[1] 范阿萍 张媛媛[1] LIU Zhuannian, SHAO Huafan, HAN Xiaogang, FAN Aping, ZHANG Yuanyuan(College of Geology and Environment, Xi＇an Uninversity of Science and Technology, Xi＇an 710054, China)

机构地区：[1]西安科技大学地质与环境学院,陕西西安710054

出　　处：《洁净煤技术》2018年第1期136-141,共6页Clean Coal Technology

基　　金：国家自然科学基金资助项目(51278418)

摘　　要：为有效去除水体中持久存在、难降解的有机污染物苯酚,采用高能球磨获得褐煤煤粉制备合成煤基聚苯胺,利用扫描电镜、傅里叶变换红外光谱等方法对原煤粉及煤基聚苯胺进行表征。以原煤粉做对照试验,研究了煤基聚苯胺对苯酚模拟废水的吸附性能和机理。结果表明,煤基聚苯胺吸附剂孔结构和分布比原煤粉好,具有较多中孔和微孔结构,有利于增大吸附容量。pH=4时,褐煤原煤粉和煤基聚苯胺去除率最大分别为22.74%和45.32%,因此酸性条件下,2种吸附剂对苯酚溶液的吸附效果较好。煤基聚苯胺对苯酚的去除效果较好,最佳投加量为1 g/L,去除率和饱和吸附量分别为45.32%和32.52 mg/g。煤基聚苯胺吸附剂对苯酚吸附符合Lagergren二级吸附动力学模型与Freundlich吸附等温模型。煤基聚苯胺吸附剂制备简单,原料易得,具有较好的工业化应用潜力。In order to effectively remove the persistent and refractory organic pollutants phenol in water. Coal-based polyaniline was prepared by lignite coal milled with high energy ball.Various measures such as SEM and FTIR were used to characterize the structure of coalbased polyaniline and raw coal powder.Adsorption properties and mechanism of coal-based polyaniline to phenol solution were studied with raw coal powder as the control experiment.The results show that pore structure and distribution of the coal-based polyaniline adsorbent are better than that of raw coal powder and it has more mesopores and microporous,which is conducive to increase the adsorption capacity.When pH is 4,the removal rate of raw coal powder and coal-based polyaniline are 22.74% and 45.32%,respectively.In acidic conditions,the adsorption effect of the adsorbents on phenol solution are better. The adsorption effect of coal-based polyaniline on phenol solution is better than that of raw coal powder,which optimum dosage is 1 g/L,and the removal rate and adsorption capacity are 45. 32% and 32.52 mg/g,respectively.The adsorption of coal-based polyaniline adsorbent on phenol follows the Lagergren second-order adsorption kinetics model and the Freundlich adsorption isotherm model.Coal-based polyaniline adsorbent has good potential for industrial applications due to its simple preparation procedure and easily available raw materials.

关 键 词：煤基聚苯胺 苯酚 废水 吸附性能 褐煤 

分 类 号：X703[环境科学与工程—环境工程]