摘要
通过硝酸铁溶液浸渍—加热的方法对颗粒活性炭进行改性,采用BET比表面积测定、扫描电子显微镜(SEM)观察、Boehm官能团滴定等分析方法对改性前后的活性炭理化特性进行表征,考察吸附剂投加量、吸附时间、pH、吸附质初始浓度、温度等对Cu(Ⅱ)吸附性能的影响。结果显示,活性炭表面化学性质的改变对吸附性能的提高起主导作用;吸附过程与Langmuir吸附等温线方程及Lagergren准二级动力方程拟合较好,相关系数R2都在0.990 0以上。
The modified granular activated carbon was prepared by iron nitrate using immersion-heating technique.The physicochemical properties of the two kinds of adsorbent,which were the granular activated carbon before and after modifying,were characterized by analysis methods of BET specific surface area measure,scanning electron microscope（SEM）observation,Boehm functional group titration,etc.The change of adsorption performance and influences of dosage,adsorption time,pH,temperature and initial concentration of Cu（Ⅱ）on Cu（Ⅱ）adsorption by the two kinds of adsorbent were investigated respectively.The results indicated that the surface chemical properties change played the main role in the improvement of the performance of the adsorption.The adsorption process was well fitted to both Langmuir adsorption equation and Lagergren second-order kinetics equation with the correlation coefficients R2 above 0.990 0.
出处
《环境污染与防治》
CAS
CSCD
北大核心
2015年第9期65-70,共6页
Environmental Pollution & Control
关键词
硝酸铁
改性活性炭
吸附
重金属离子
动力学
iron nitrate
modified activated carbon
adsorption
heavy metal ion
kinetics
