Dyes Adsorption onto Fe3O4-Bis(trimethoxysilylpropyl)amine Composite Particles: Effects of pH and Ionic Strength on Electrostatic Interactions

被引：15
|
作者：
Hu, Yaoqiang [1 ,2 ,3 ]
Li, Kexin [1 ,2 ]
Li, Yuting [1 ,2 ]
Liu, Haining [1 ,2 ,4 ]
Guo, Min [1 ,2 ]
Ye, Xiushen [1 ,2 ,4 ]
Wu, Zhijian [1 ,2 ]
Lee, Kangtaek [4 ]
机构：
[1] Chinese Acad Sci, Qinghai Inst Salt Lakes, CAS Key Lab Comprehens & Highly Efficient Utiliza, Xining 810008, Qinghai, Peoples R China
[2] Chinese Acad Sci, Qinghai Inst Salt Lakes, Key Lab Salt Lake Resources Chem Qinghai Prov, Xining 810008, Qinghai, Peoples R China
[3] Guangdong Ocean Univ, Coll Ocean & Meteorol, Zhanjiang 524088, Peoples R China
[4] Yonsei Univ, Dept Chem & Biomol Engn, Seoul 03722, South Korea
来源：
CHEMISTRYSELECT | 2019年 / 4卷 / 02期
关键词：
Dye; Adsorption Mechanism; Electrostatic Interaction; pH; Ionic Strength; CARBON-COATED MONOLITH; METHYLENE-BLUE; AQUEOUS-SOLUTION; ENHANCED ADSORPTION; REMOVAL; ORANGE; DEGRADATION; ADSORBENT; HYDROPHOBICITY; NANOPARTICLES;
D O I：
10.1002/slct.201803241
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Hydrophobic, electrostatic interactions, and hydrogen bonding play important roles in dyes adsorption. Solution pH and ionic strength of aqueous solutions are important factors affecting dye adsorption by influencing the aforementioned interactions. In order to understand adsorption mechanism of dye on the mesoporous particles, Fe3O4-bis(trimethoxysilylpropyl)amine (Fe3O4-TSPA) composite particles were used to adsorb methyl orange (MO), methyl blue (MB), and neutral red (NR) from aqueous solutions. Fe3O4-TSPA particles were found to be effective in removing acidic dyes at pH < 8.5. The adsorption amount of MB was nearly 0.047 mmol/g at pH 2. The adsorptions of MO and MB were found to be significantly influenced by electrostatic interactions. Based on the effect of NaCl on the adsorption, it was concluded that the electrostatic attraction was suppressed by high ionic strength, but suppression was less significant when electrostatic attraction was strong.
引用
收藏
页码：617 / 622
页数：6
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