活性炭纤维吸附邻硝基苯胺水溶液的研究.pdf

第39卷第5期
应用化工
Vol 39 No5
2010年5月
Applied Chemical Industry
May 2010
活性炭纤维吸附邻硝基苯胺水溶液的研究
陈晓英,朱仙弟,梁华定,陈义
(台州学院医药化工学院,浙江台州317000
摘要:采用活性炭纤维(ACF)处理邻硝基苯胺模拟废水,通过静态和动态吸附实验,研究了pH、盐含量、吸附时
间对吸附效果的影响,测定了吸附等温线和动态穿透曲线,并进行了ACF再生实验。结果表明,在实验条件下,
ACF对邻硝基苯胺的吸附速率很快,5min去除率达96%,在pH4.4~10.4条件下吸附效果较好,盐的含量对吸附
效果影响较小,吸附等温线能用 Langmuir和 Freundlich方程较好地拟合。溶液流速增大,穿透时间提前,吸附饱和
的ACF用无水乙醇再生,重复5次,邻硝基苯胺的回收率均在5%以上,ACF的吸附效率无明显变化。
关键词:活性炭纤维;邻硝基苯胺;吸附;再生
中图分类号:0647.3
文献标识码:A文章编号:1671-3206(2010)05-0669-04
Study on the adsorption of o-nitroaniline aqueous solution
by activated carbon fiber
CHEN Xiao-ying, ZHU Xian-di, LANG Hua-ding, CHEN Yi
School of Pharmaceutics and Chemical Engineering, Taizhou University, Taizhou 317000, China)
Abstract Activated carbon fiber(ACF was used to treat o-nitroaniline wastewater. The effects of factors
such as PH value, salt content and adsorption time on adsorption efficiency were studied, the adsorption
isotherm and dynamic adsorption breakthrough curve were determined and the regeneration of ACFWAS al-
studied through static and dynamic adsoption experiment methods. The results indicated that the ad-
sorption speed was fast, and the removal rate of o-nitroaniline was almost 96%o at 5 min under the experi
mental conditions, A Cr had good adsorption properties when PH 4. 4 10.4 and less influence with salt
content. he adsorption isotherms can be well represented by Langmuir and Freundlich equation. The
breakthrough time advances with the increase of flow rate. Saturated ACFS regenerated by anhydrous etha
nol, the recovery rate of o-nitroaniline were more than 95% and the regeneration efficiency was not much
difference after five cycles
Key words: activated carbon fiber; o-nitroaniline; adsorption; regeneration
邻硝基苯胺是染料、制药、塑料等行业的重要原质量轻、比表面积大、微孔丰富、孔径小、分布窄、吸
料和中间体,毒性比苯胺大,可通过皮肤吸收和呼吸附速度快、吸附能力强、再生条件温和等优点,近年
道吸入进人人体,对人体健康和生物环境危害极大,来在水处理方面的应用研究逐渐增加”,而采用
属环境优先控制污染物和处理难度较大的化合
ACF处理邻硝基苯胺废水的研究尚未见有报道。
物。目前对邻硝基苯胺废水处理有氧化法2】、电
解法]、离子交换吸附们等方法。这些方法存在着不文以毡形ACF为吸附剂,邻硝基苯胺水溶液为处
处理成本高、操作复杂、处理剂不能循环利用、后处理对象,通过静态吸附、动态吸附和吸附剂再生,研
理重新污染等一个或多个缺点,难以在实际废水处究ACF对邻硝基苯胺的吸附行为,为废水中对邻硝
理中得以普遍应用。活性炭纤维(ACF)作为一种新基苯胺的处理、回收及ACF的循环利用提供必要的
型高效吸附剂,与传统颗粒与粉状活性炭相比,具有参考。
收稿日期:2010-03-22修改稿日期:2010-03-29
基金项目:浙江省自然科学基金2006年资助项目(Y405377);浙江省教育厅资助项目(20070512
作者简介:陈晓英(1981-),女,浙江台州人,台州学院实验师,从事无机材料研究。电话:13586104101,E-mail:cxy198
tac. edu. cn
通讯联系人:朱仙弟,电话:0576-85231211,E-mail:zxdyxy@tze.edu.cn