黏胶基活性碳纤维吸附吡啶

doi:10.16085/j.issn.1000-6613.2015.07.041

化工进展 ›› 2015, Vol. 34 ›› Issue (07): 2055-2059.DOI: 10.16085/j.issn.1000-6613.2015.07.041

黏胶基活性碳纤维吸附吡啶

薛蓓¹, 张小平¹, 李楠², 张培¹

1 华南理工大学环境与能源学院, 广东广州 510006;
2 76349部队, 广东广州 510650

收稿日期:2014-11-26 修回日期:2014-12-26 出版日期:2015-07-05 发布日期:2015-07-05
通讯作者: 张小平,教授,研究方向为固体废弃物回收及循环利用。E-mail:xpzhang@scut.edu.cn。
作者简介:薛蓓(1991—),女,硕士研究生,从事水处理研究。
基金资助:
国家自然科学基金项目(21377041, 21037001)。

Adsorption characteristics of pyridine on rayon-based activated carbon fiber

XUE Bei¹, ZHANG Xiaoping¹, LI Nan², ZHANG Pei¹

1 School of Environment and Energy, South China University of Technology, Guangzhou 510006, Guangdong, China;
2 Group 76349, Guangzhou 510650, Guangdong, China

Received:2014-11-26 Revised:2014-12-26 Online:2015-07-05 Published:2015-07-05

摘要/Abstract

摘要： 采用黏胶基活性碳纤维(rayon-based ACF)吸附焦化尾水中的典型有机物吡啶, 考察了在不同时间、投加量、温度以及有机物影响的条件下, 黏胶基活性碳纤维对吡啶的静态吸附效果。从动力学、热力学和分子结构等方面来判断吸附类型, 并从理论上分析黏胶基活性碳纤维对模拟焦化尾水典型有机污染物的吸附过程。实验结果表明, 当吡啶废水的初始浓度为25mg/L时, 黏胶基活性碳纤维对吡啶的吸附在60min基本达到平衡, 最大吸附量为17.66mg/g;随着温度的升高, 吸附效率下降;共存有机物喹啉会抑制吡啶的吸附效率, 使黏胶基活性碳纤维对吡啶的吸附率显著降低;活性碳纤维吸附吡啶的过程符合Lagergren准二级动力学模型, 其相关系数>0.999, 在22℃的液相温度下, 吸附等温式为q=2.3138c_e^0.9540。热力学参数ΔH⁰、ΔG⁰均为负值, 表明该吸附是一个自发的放热过程。

关键词: 黏胶基活性碳纤维, 吸附, 吡啶, 喹啉, 动力学, 热力学

Abstract: This article studied the static adsorption of pyridine and quinoline on rayon-based activated carbon fiber(rayon-based ACF), investigated the influencing factors of adsorption efficiency and behaviors such as time, dose, temperature and organic compound, and analyzed the adsorption type and process of typical organic pollutants of coking water from the aspects of kinetic, thermodynamic and molecular structure. The results showed that when the initial concentration of pyridine wastewater was 25mg/L, the maximum adsorption capacity was 17.66mg/g and it took about 60min to reach the adsorption equilibrium. Adsorption efficiency decreased with increasing temperature. The presence of quinoline inhibited the adsorption efficiency of pyridine, and the adsorption rate of pyridine was significantly decreased. Pyridine adsorption processes of carbon fiber agreed with pseudo second-order kinetic model with the correlation coefficient of 0.9999. Freundlich isotherm of pyridine adsorption on the ACF at liquid temperature of 22℃ was q=2.3138c_e^0.9540. ΔG⁰ and ΔH⁰ were both negative, indicating spontaneous and exothermic adsorption.

Key words: Rayon-based activated carbon fiber, adsorption, pyridine, quinoline, kinetics, thermodynamics

中图分类号:

薛蓓, 张小平, 李楠, 张培. 黏胶基活性碳纤维吸附吡啶[J]. 化工进展, 2015, 34(07): 2055-2059.

XUE Bei, ZHANG Xiaoping, LI Nan, ZHANG Pei. Adsorption characteristics of pyridine on rayon-based activated carbon fiber[J]. Chemical Industry and Engineering Progree, 2015, 34(07): 2055-2059.

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黏胶基活性碳纤维吸附吡啶

Adsorption characteristics of pyridine on rayon-based activated carbon fiber

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