芦苇黑液木质素制备活性炭吸附废水中的硝基苯  

Removal of nitrobenzene in the effluent by activated carbon from reed black liquor lignin

作　　者：孙勇[1,2] 张金平[1,2] 杨刚[1,2] 李佐虎[1] 

机构地区：[1]中国科学院过程工程研究所 国家生化工程重点实验室 [2]中国科学院研究生院北京100039

出　　处：《中华纸业》2006年第5期65-67,共3页China Pulp & Paper Industry

基　　金：国家重点基础研究发展计划项目(No.2004CB719701)资助课题(批准号:2004CB719701)

摘　　要：以芦苇造纸黑液酸沉木质素为原料,使用流化床在500℃下炭化5min,再将其与K2CO3以1∶2比例混合转入管式炉中,在900℃下活化60min。通过对氮气以及对废水中硝基苯的吸附表征,表明该法所制备的木质素微孔活性炭的比表面积可达1395m2/g,且吸附性能良好。同时Langmuir吸附方程较Freundlich吸附方程能更好地描述该活性炭对硝基苯的吸附过程。FT-IR红外光谱说明活性炭中硅的存在;SEM扫描电镜观察到活性炭多孔的生成。The activated carbon was produced from reed black liquor lignin by pre-carbonized in the fluidized bed at 500℃ for 5 min and then mixed with K2CO3 at the ratio of 1 ： 2, followed by a 60 min activation at 900℃ in the tubular furnace. The characterization of the nitrogen and the adsorption of the nitrobenzene in the effluent indicates that the specific surface area of the activated carbon thus prepared can reach 1395 （m^2/g） with a good adsorbability. The Langmuir adsorption equation is better than the Freundlich adsorption equation in describing the adsorption process of the activated carbon to nitrobenzene. FT-IR spectroscopy shows the presence of silicon in,the activated carbon and the porousness of the activated carbon can be observed through SEM.

关 键 词：木质素 活性炭 流化床 硝基本 红外光谱 芦苇 

分 类 号：X703.5[环境科学与工程—环境工程] X793