改性木屑对阿特拉津的吸附特性  

Adsorption Characteristics of Modified Sawdust on Atrazine

作　　者：李剑锋[1] 高大文[1] 

机构地区：[1]东北林业大学,哈尔滨150040

出　　处：《东北林业大学学报》2011年第6期44-46,100,共4页Journal of Northeast Forestry University

基　　金：全国优秀博士学位论文专项基金项目(200544);黑龙江省杰出青年基金项目(JC200909)

摘　　要：以天然木屑为原料,通过碱化和用阳离子表面活性剂共同改性制备低成本吸附剂,通过静态吸附实验探讨了改性木屑和3种颗粒活性炭对阿特拉津(AT)的吸附行为。结果表明,改性后的木屑对AT的吸附能力明显增强,在AT质量浓度为100μg/L的条件下,改性木屑对AT的去除率可达90%。通过采用FTIR、SEM等分析手段对材料改性前后进行表征,发现改性后孔隙度提高,表面结构更丰富,利于吸附;改性材料表面负载CTBA,增强了对AT的吸附。改性木屑对AT的吸附符合Freundlich等温方程;该吸附作用受温度、pH值的影响较大。A low-cost adsorbent was prepared by the modification of alkalization and cationic surfactant using sawdust as raw material.The adsorption process of the modified sawdust and three kinds of granular activated carbon on atrazine（AT） was discussed though static adsorption experiment.Result indicated that the adsorption capacity of sawdust was obviously enhanced after modification,and the removal rate of the modified sawdust could reach about 90% with AT at 100 ug/L.Meanwhile,the structure of sawdust after modification was studied by means of FTIR and SEM.The modified sawdust covered with CTBA had more porosity and larger specific surface area,which was more favorable to adsorption of AT.The adsorption of the modified sawdust on AT could be well described by Freundlich isotherm equation.Temperature and pH value had an important effect on adsorption of AT.

关 键 词：阿特拉津(AT) 改性木屑 颗粒活性炭 吸附特性 

分 类 号：X171.1[环境科学与工程—环境科学]