Novel application of nanoscale zero valent iron and bimetallic nano-Fe/Cu particles for the treatment of cesium contaminated water

Tamer Shubair, Osama Eljamal, Ahmed M. E. Khalil, Atsushi Tahara, Nobuhiro Matsunaga

研究成果: Contribution to journalArticle査読

38 被引用数 (Scopus)

抄録

Following the accident at the Fukushima Daiichi Nuclear Power Plant in 2011, radioactive cesium was released
into the environment in large amounts and heavily contaminated drinking water in Fukushima and neighboring
prefectures. In this research, the capability of nanoscale zero valent iron (nZVI) and bimetallic nano-Fe/Cu
particles for cesium removal from aqueous solutions was evaluated for the first time. The nanoparticles were
characterized by TEM, XRD, SEM-EDS and BET-N2 adsorption. The effect of several variables such as initial
cesium concentration, contact time, pH, temperature, competing cations and dosage of the nanoparticles on the
sorption behavior of cesium was studied using a batch technique. The obtained results showed that nZVI and
nano-Fe/Cu particles displayed effective performance for removal of cesium. For both nanoparticles, the removal
efficiency exceeded 99% at initial cesium concentration of 1 mg/L and 1 g/L doses. The experimental data were
well fitted to the pseudo-second-order kinetic model, which means that the overall rate constant of cesium
sorption process was controlled by chemisorption. The rate constant of nano-Fe/Cu particles was larger than that
of nZVI, indicating a faster kinetic sorption by nano-Fe/Cu particles. The thermodynamic parameters indicated
exothermic and spontaneous nature of the sorption process. The Langmuir, Freundlich and Redlich-Peterson
isotherm models were also used to fit the equilibrium data. nZVI and nano-Fe/Cu particles exhibited excellent
selective sorption toward cesium in the simulated contaminated water after Fukushima accident. The current
work demonstrated that nZVI and nano-Fe/Cu particles can be considered as promising materials for cesium
removal from contaminated waters.
本文言語英語
ページ(範囲)4253-4264
ページ数12
ジャーナルJournal of Environmental Chemical Engineering
6
4
出版ステータス出版済み - 6 6 2018

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