有机膨润土对模拟废水中苯酚的吸附特性

doi:10.16085/j.issn.1000-6613.2017.02.046

化工进展 ›› 2017, Vol. 36 ›› Issue (02): 735-741.DOI: 10.16085/j.issn.1000-6613.2017.02.046

有机膨润土对模拟废水中苯酚的吸附特性

陈焕利^1,2, 邢宝林^1,2, 谌伦建^1,2, 徐冰^1,2, 苏毓^1,2, 郭晖^1,2

1 河南理工大学化学化工学院, 河南焦作 454003;
2 煤炭安全生产河南省协同创新中心, 河南焦作 454003

收稿日期:2016-06-27 修回日期:2016-08-25 出版日期:2017-02-05 发布日期:2017-02-05
通讯作者: 邢宝林,博士、副教授,从事洁净煤技术及炭材料方面的研究。E-mail:baolinxing@hpu.edu.cn。
作者简介:陈焕利(1991-),女,硕士研究生,研究方向为洁净煤技术。E-mail:chenhuanlihpu@163.com。
基金资助:
国家自然科学基金（51404098，51174077）及河南省国际科技合作项目（152102410047）。

Adsorption of phenol from simulated wastewater by organic bentonite

CHEN Huanli^1,2, XING Baolin^1,2, CHEN Lunjian^1,2, XU Bing^1,2, SU Yu^1,2, GUO Hui^1,2

1 College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454003, Henan, China;
2 Collaborative Innovation Center of Coal Work Safety, Henan Province, Jiaozuo 454003, Henan, China

Received:2016-06-27 Revised:2016-08-25 Online:2017-02-05 Published:2017-02-05

摘要/Abstract

摘要： 以商品化有机膨润土为吸附剂来处理含酚模拟废水，在利用低温N₂物理吸附仪、扫描电镜（SEM）和傅里叶红外光谱仪（FTIR）系统研究有机膨润土微观结构及表面化学性质的基础上，系统考察了吸附时间、吸附剂用量、温度及溶液pH等因素对模拟废水中苯酚吸附特性的影响，并探讨其吸附过程的动力学。结果表明，该有机膨润土的比表面积及总孔容分别可达31.7m²/g和0.113cm³/g，孔径主要分布在3~24nm，属于典型的介孔材料，且具有明显的片层结构和较为丰富的表面官能团。吸附时间、吸附剂用量、温度及溶液pH是影响苯酚脱除的重要因素。当吸附时间为120min、吸附剂用量为2g、温度为30℃、溶液pH为7时，有机膨润土对模拟废水中苯酚的脱除率和吸附量分别为71.32%和1.78mg/g。有机膨润土对苯酚的吸附过程可用伪二级动力学模型描述。

关键词: 有机膨润土, 苯酚, 废水, 吸附, 动力学, 脱除率

Abstract: Commercial organic bentonite was used as adsorbent to treat the phenol simulated wastewater. The microstructure and surface chemical properties of organic bentonite were characterized by N₂ physical adsorption analyzer,scanning electron microscope (SEM)and Fourier transform infrared spectroscopy (FTIR). Effects of adsorption time,dosage of adsorbent,temperature and solution pH on phenol adsorption performance were investigated and the kinetic characteristics in adsorption process was also studied. The results showed that organic bentonite belongs to the typical mesoporous materials in which the specific surface area and total pore volume can reach 31.7m²/g and 0.113cm³/g,and the pore size distribution is in the range of 3-24nm. Moreover,the organic bentonite exhibits obvious lamellar structure and rich surface functional groups. Adsorption time,adsorbent dosage,temperature and solution pH are the important factors on phenol removal. When adsorption time is 120min,adsorbent dosage is 2g,temperature is 30℃and solution pH is 7,the phenol removal rate and adsorption capacity of organic bentonite can reach 71.32% and 1.78 mg/g,respectively. The adsorption of phenol on organic bentonite follows the pseudo-second-order kinetic model.

Key words: organic bentonite, phenol, waste water, adsorption, kinetics, removal rate

中图分类号:

TD875.5
X52

陈焕利, 邢宝林, 谌伦建, 徐冰, 苏毓, 郭晖. 有机膨润土对模拟废水中苯酚的吸附特性[J]. 化工进展, 2017, 36(02): 735-741.

CHEN Huanli, XING Baolin, CHEN Lunjian, XU Bing, SU Yu, GUO Hui. Adsorption of phenol from simulated wastewater by organic bentonite[J]. Chemical Industry and Engineering Progree, 2017, 36(02): 735-741.

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有机膨润土对模拟废水中苯酚的吸附特性

Adsorption of phenol from simulated wastewater by organic bentonite

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