文献类型：期刊文献

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

作者：Hu Y.; Li K.; Li Y.; Liu H.; Guo M.; Ye X.; Wu Z.; Lee K.

机构：[1]CAS Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources & Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, 810008, China;[2]College of Ocean and meteorology, Guangdong Ocean University, Zhanjiang, 524088, China;[3]Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul, 03722, South Korea

年份：2019

卷号：4

期号：2

起止页码：617

外文期刊名：ChemistrySelect

收录：Scopus(收录号：2-s2.0-85060260438)

语种：英文

外文关键词：Adsorption Mechanism; Dye; Electrostatic Interaction; Ionic Strength; pH

外文摘要：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. ? 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim