Removal of Cs+ and Sr2+ from water using MWCNT reinforced Zeolite-A beads

被引：49
|
作者：
Vipin, Adavan Kiliyankil [1 ]
Ling, Sun [1 ]
Fugetsu, Bunshi [1 ]
机构：
[1] Hokkaido Univ, Grad Sch Environm & Earth Sci, Kita Ku, Kita 10,Nishi 5, Sapporo, Hokkaido 0600810, Japan
来源：
MICROPOROUS AND MESOPOROUS MATERIALS | 2016年 / 224卷
关键词：
Cesium; Strontium; Zeolite-A; Alginate; Multiwalled carbon nanotubes; CALCIUM ALGINATE BEADS; CESIUM IONS; SORPTION; BLUE; ADSORBENTS; COPPER;
D O I：
10.1016/j.micromeso.2015.11.024
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Removal of hazardous radioactive cesium and strontium was an unresolved problem. Therefore, we developed a novel adsorbent for the removal of both cesium and strontium ions by encapsulating zeolite-A into MWCNT-reinforced alginate gel. The performance of beads was systematically evaluated by batch sorption experiments, followed by equilibrium and kinetic studies with different mathematical models. Experimental data gave better mathematical fitting towards pseudo-second-order kinetic model and Langmuir isotherm model, which means that the uptake mechanism was monolayer chemisorption involving an ion exchange. The maximum theoretical Cs+/Sr2+ sorption capacity of MWCNT modified zeolite-A beads was 113/107 mg/g, and that of without MWCNT was 102/96 mg/g, respectively. The effective surface area, encapsulation ability and sorption capacity of adsorbent were improved by MWCNT. (C) 2015 Elsevier Inc. All rights reserved.
引用
收藏
页码：84 / 88
页数：5
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