EDTA-functionalized KCC-1 and KIT-6 mesoporous silicas for Nd3+ ion recovery from aqueous solutions

被引：114

作者：

Ravi, Seenu ^{[1
]}

Zhang, Siqian ^{[1
]}

Lee, Yu-Ri ^{[1
]}

Kang, Kyoung-Ku ^{[2
]}

Kim, Ji-Man ^{[3
]}

Ahn, Ji-Whan ^{[4
]}

Ahn, Wha-Seung ^{[1
]}

机构：

[1] Inha Univ, Dept Chem Engn, Incheon 402751, South Korea

[2] Chungnam Natl Univ, Dept Chem Engn & Appl Chem, Daejeon 305764, South Korea

[3] Sungkyunkwan Univ, Dept Chem, Seoul, South Korea

[4] Korea Inst Geosci & Mineral Resource KIGAM, 124 Gwahang No, Daejeon 305350, South Korea

来源：

JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY | 2018年 / 67卷

基金：

新加坡国家研究基金会;

关键词：

Adsorption; Rare earth elements; Mesoporous silica; KIT-6; KCC-1; RARE-EARTH-ELEMENTS; SOLVENT-EXTRACTION; ADSORPTION; SORPTION; ACID; PRECONCENTRATION; REMOVAL; BEHAVIOR; METALS; ZN(II);

D O I：

10.1016/j.jiec.2018.06.031

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Ethylenediaminetetraacetic acid (EDTA)-functionalized KIT-6 and KCC-1 mesoporous silicas were prepared via post-synthesis grafting and examined for their ability to promote the recovery of rare earth metal ions such as Nd3+ from an aqueous medium. The obtained adsorption isotherms were fitted to the Langmuir model, which gave a maximum adsorption of Nd3+ ions of 109.8 and 96.5 mg/g for KIT-6-EDTA and KCC-1-EDTA, respectively, at 25 degrees C and pH 6. The adsorption kinetic profile of KIT-6 was faster than KCC-1. KIT-6 was also proved to be more stable against desorption under acidic regeneration conditions. (C) 2018 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.

引用

页码：210 / 218

页数：9

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