Removal of uranium (VI) from aqueous systems by nanoscale zero-valent iron particles suspended in carboxy-methyl cellulose

被引:51
作者
Popescu , Ioana-Carmen [1 ]
Filip, Petru [2 ]
Humelnicu, Doina [3 ]
Humelnicu, Ionel [3 ]
Scott, Thomas Bligh [4 ]
Crane, Richard Andrew [4 ]
机构
[1] ICPMRR Bucharest, R&D Natl Inst Met & Radioact Resources, Sect 2, Bucharest 202917, Romania
[2] CD Nenitescu Inst Organ Chem, Bucharest 71141, Romania
[3] Alexandru Ioan Cuza Univ, Fac Chem, Bucharest 700506, Romania
[4] Univ Bristol, Interface Anal Ctr, Bristol BS2 8BS, Avon, England
基金
英国工程与自然科学研究理事会;
关键词
ZEROVALENT IRON; URANYL IONS; NANOPARTICLES; DECHLORINATION; REMEDIATION; GROUNDWATER; ADSORPTION; REDUCTION; ELECTROCHEMISTRY; TRANSFORMATION;
D O I
10.1016/j.jnucmat.2013.07.018
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Carboxy-methyl-cellulose (CMC), a common "delivery vehicle" for the subsurface deployment of iron nanoparticles (INP) has been tested in the current work for the removal of aqueous uranium from synthetic water samples. A comparison of the removal of aqueous uranium from solutions using carboxy-methyl-cellulose with and without iron nanoparticles (CMC-INP and CMC, respectively) was tested over a 48 h reaction period. Analysis of liquid samples using spectrophotometry determined a maximum sorption capacity of uranium, Q(max), of 185.18 mg/g and 322.58 mg/g for CMC and CMC-INP respectively, providing strong evidence of an independent aqueous uranium removal ability exhibited by CMC. The results point out that CMC provides an additional capacity for aqueous uranium removal. Further tests are required to determine whether similar behaviour will be observed for other aqueous contaminant species and if the presence of CMC within a INP slurry inhibits or aids the reactivity, reductive capacity and affinity of INP for aqueous contaminant removal. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码:250 / 255
页数:6
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