AloeVera as an effective biosorbent for the removal of thorium and barium from aqueous solutions

被引：19

作者：

Kapashi, Eleftheria ^{[1
]}

Kapnisti, Maria ^{[2
]}

Dafnomili, Argyro ^{[1
]}

Noli, Fotini ^{[1
]}

机构：

[1] Aristotle Univ Thessaloniki, Dept Chem, Thessaloniki 54124, Greece

[2] Int Hellen Univ, Sindos 57400, Greece

来源：

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 2019年 / 321卷 / 01期

关键词：

Biosorption; AloeVera; Thorium; Barium; Sorption isotherms-kinetics; METAL-IONS; HEAVY-METALS; RICE HUSK; ADSORPTION; SORPTION; BIOSORPTION; KINETICS; EQUILIBRIUM; RETENTION; CADMIUM;

D O I：

10.1007/s10967-019-06558-x

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The use of three biosorbents based on AloeVera wastes for the removal of thorium and barium from aqueous solutions (C-init: 5-200mgL(-1), pH 3 and 5) was investigated using radiochemical and spectroscopic techniques. The biosorbents (raw and modified materials by acidic and alkaline reagents) were characterized before and after sorption by SEM, XRD and FTIR. The alkaline modified materials exhibited significant removal efficiency (170 and 107.5mgg(-1) for thorium and barium, respectively). The equilibrium data were fitted by Langmuir and Freundlich models whereas leaching and desorption tests were also performed. Furthermore kinetics and thermodynamic data indicate a complex mechanism involving mainly physical sorption and surface precipitation.

引用

页码：217 / 226

页数：10

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