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Removal of Rhodamine B from Water by Benzyl-Functionalized Ionic Liquids
被引:6
|作者:
Fan, Yunchang
[1
]
Dong, Xing
[1
]
Li, Yun
[1
]
Zhong, Yingying
[2
]
Miao, Juan
[1
]
Hua, Shaofeng
[1
]
机构:
[1] Henan Polytech Univ, Coll Phys & Chem, Jiaozuo 454003, Peoples R China
[2] Technol Ctr Ningbo Entry Exit Inspect & Quarantin, Ningbo, Zhejiang, Peoples R China
基金:
中国国家自然科学基金;
关键词:
pi-pi Stacking;
Benzyl-functionalized ionic liquids;
Extraction;
Triphenylmethane dyes;
AQUEOUS-SOLUTIONS;
AZO DYES;
EXTRACTION;
DEGRADATION;
THERMODYNAMICS;
ADSORPTION;
D O I:
10.1002/clen.201500363
中图分类号:
X [环境科学、安全科学];
学科分类号:
08 ;
0830 ;
摘要:
The removal of rhodamine B by benzyl-functionalized ionic liquids (ILs) from water was carried out. Effects of aqueous pH value, concentration of rhodamine B, phase volume ratio, and the presence of salt on the extraction efficiency have been investigated. Experimental results showed that the extraction efficiency of rhodamine B decreased with the increase of pH value. Thermodynamic studies indicated that hydrophobic interaction is the main driving force, besides, pi-pi stacking, electrostatic interaction, and salting-out effect are also important for the extraction of rhodamine B. Notably, the quantitative extraction of rhodamine B into 1-butyl-3-benzylimidazolium bis(trifluoromethylsulfonyl) imide ([C(4)Bzim]NTf2) was achieved even at the phase volume ratio V-w/V-IL = 500: 1. After extraction, [C(4)Bzim]NTf2, could be directly reused at least five times. These results suggest that the [C(4)Bzim]NTf2 has potential application in the removal of rhodamine B from water.
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页码:1106 / 1112
页数:7
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