乙酸膨润土对孔雀石绿的吸附去除

doi:10.16085/j.issn.1000-6613.2016.03.043

化工进展 ›› 2016, Vol. 35 ›› Issue (03): 944-949.DOI: 10.16085/j.issn.1000-6613.2016.03.043

乙酸膨润土对孔雀石绿的吸附去除

覃岳隆¹, 张寒冰^1,2, 陈宁华¹, 施华珍², 冼东成¹, 童张法², 唐艳葵¹

1 广西大学环境学院, 广西南宁 530004;
2 广西大学化学化工学院, 广西石化资源加工及工程强化技术重点实验室, 广西南宁 530004

收稿日期:2015-09-22 修回日期:2015-11-10 出版日期:2016-03-05 发布日期:2016-03-05
通讯作者: 张寒冰,博士,硕士生导师,主要从事工业废水处理研究与教学工作。E-mail:coldicezhang0771@163.com.
作者简介:覃岳隆(1990-),男,硕士研究生,主要从事工业废水处理。E-mail:qinyl036@sina.com.
基金资助:
国家自然科学基金(21166004,51168001,21576055)、广西教育厅科研资助项目(LX2014005)及广西石化资源加工及过程强化技术重点实验室主任课题基金(2013Z004)项目。

Malachite green adsorption on acetic acid bentonite

QIN Yuelong¹, ZHANG Hanbing^1,2, CHEN Ninghua¹, SHI Huazhen², XIAN Dongcheng¹, TONG Zhangfa², TANG Yankui¹

1 School of Environment, Guangxi University, Nanning 530004, Guangxi, China;
2 Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, Guangxi, China

Received:2015-09-22 Revised:2015-11-10 Online:2016-03-05 Published:2016-03-05

摘要/Abstract

摘要： 为提高膨润土对染料的吸附性能,制备了有机酸改性膨润土-乙酸膨润土(AAB).对AAB 进行了N₂-BET、FTIR 和XRD 表征分析,同时考察了影响乙酸膨润土(AAB)去除孔雀石绿(MG)的主要因素,并进行了吸附动力学和吸附等温模型研究。研究结果表明,乙酸分子已成功负载在天然膨润土(RB)上,AAB 的比表面积为 45m2/g;层间距为1.721nm;在实验条件下,用0.4g/L 的吸附剂处理300mg/L 的MG,MG 的脱色率达到99%; pH 值为1～12 时,AAB 对MG 的脱色率均达到97%以上;低浓度的十二烷基苯磺酸钠(SDBS)能提高AAB 对MG 的去除率,而加入十六烷基三甲基溴化铵(CTAB)会产生很强的抑制作用;AAB 对MG 的吸附符合 Langmuir 模型,Langmuir 吸附容量高达1250mg/g;MG 在AAB 上的吸附先是一个快速吸附阶段,然后逐渐到达吸附平衡,符合准二级动力学模型。总之,AAB 环保无毒,在MG 去除方面具有用量低、适应pH 值范围广、吸附容量大和吸附快速的优势。

关键词: 乙酸膨润土, 吸附, 孔雀石绿, 吸附模型

Abstract: In order to improve the dyes adsorption properties of bentonite,organic acid modified bentonite(AAB)was prepared. AAB were characterized by N₂-BET,FTIR and XRD. In addition, main influencing factors of malachite green(MG) removal by AAB were investigated,with the adsorption isotherms and adsorption kinetics of MG on AAB were also studied. The results showed that the specific surface area of AAB was 45m2/g;the acetic acid molecule was successfully loaded on raw bentonite(RB),with the interlamellar spacing was 1.721nm. Under experimental conditions, decolorizing rate reached 99% when the adsorption dosage for 300mg/L MG with 0.4g/L AAB. The decolorizing rate of MG by AAB remained more than 97% within the initial pH 1-12 range. MG adsorption on AAB can be improved by low concentration sodium dodecyl benzene sulfonate(SDBS). On the other hand,cetyl trimethyl ammonium bromide(CTAB) suppressed MG adsorption on AAB obviously. MG adsorption on AAB followed Langmuir model and the Langmuir adsorption capacity was 1250mg/g. The adsorption process of MG was a fast adsorption stage,then gradually reached the adsorption equilibrium,which can be described by pseudo-second-order model. In summary,AAB is an environmental friendly absorbent for MG removal follow with low adsorbent dosage,rapid adsorption rate,a broad pH rang and high adsorption capacity.

Key words: acetic acid bentonite(AAB), adsorption, malachite green(MG), adsorption model

中图分类号:

覃岳隆, 张寒冰, 陈宁华, 施华珍, 冼东成, 童张法, 唐艳葵. 乙酸膨润土对孔雀石绿的吸附去除[J]. 化工进展, 2016, 35(03): 944-949.

QIN Yuelong, ZHANG Hanbing, CHEN Ninghua, SHI Huazhen, XIAN Dongcheng, TONG Zhangfa, TANG Yankui. Malachite green adsorption on acetic acid bentonite[J]. Chemical Industry and Engineering Progree, 2016, 35(03): 944-949.

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乙酸膨润土对孔雀石绿的吸附去除

Malachite green adsorption on acetic acid bentonite

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