碘
吸附
化学
生物炭
化学吸附
铋
樟脑
物理吸附
单层
无机化学
有机化学
热解
生物化学
作者
Ying Xie,Hongyi Chen,Bingyu Mei,Lingyi Jia,Yong Zhang
标识
DOI:10.1016/j.ces.2023.119205
摘要
Herein, Bi2O3 loaded with camphor leaves-derived biochar (Bi2O3@CLBC) was prepared to capture gaseous iodine. Bi2O3@CLBC was provided with a loose structure, high reactivity and relatively good thermal stability, leading to a high uptake capacity. The capture behavior of iodine on Bi2O3@CLBC was well described by the Pseudo-first-order and Langmuir models, demonstrating the occurrence of monolayer chemisorption on Bi2O3@CLBC. The maximum adsorption amount of Bi2O3@CLBC for iodine was 885.8 mg/g. The chemical uptake played a leading role in capturing volatile iodine, including the direct reaction between Bi2O3 particles and iodine vapor and the charge transfer between the –OH on biochar and iodine to generate a coordination complex. The pores on the surface of biochar could also capture some iodine through physical adsorption. In one word, this work was expected to offer a green treatment method for the excess of camphor leaves and an exceptional adsorbent for iodine uptake from spent fuel.
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