Adsorptive removal of cesium using bio fuel extraction microalgal waste
Adsorptive removal of cesium using bio fuel extraction microalgal waste
复制标题
利用生物燃料提取微藻废物吸附去除铯
DOI：
10.1016/j.jhazmat.2014.02.003
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发表时间：
2014
影响因子：
13.6
通讯作者：
Kinya Atsumi
中科院分区：
文献类型：
--
作者：
Katsutoshi Inoue;Manju Gurung;Birendra Babu Adhikari;Shafiq Alam;Hidetaka Kawakita;Keisuke Ohto;Minoru Kurata;Kinya Atsumi
提取生物柴油后，通过使用浓硫酸交联的简单化学处理，从微藻废物中制备吸附凝胶。在弱酸性至中性的pH范围内，该吸附剂对水溶液中的Cs+表现出比Na+更高的选择性和吸附能力。吸附遵循 Langmuir 等温线，根据 Langmuir 模型计算出凝胶对 Cs+ 的最大吸附容量为 1.36 mol kg−1。使用填充有 pH 6.5 吸附剂的柱成功地将水流中存在的痕量 Cs+ 离子与 Na+ 离子分离。柱操作中凝胶对 Cs+ 的吸附容量为 0.13 mol kg−1。尽管使用 1 M 盐酸溶液很容易洗脱吸附的 Cs+ 离子，但由于这种吸附剂的可燃特性，建议采用简单焚烧作为处理负载放射性 Cs+ 离子的吸附剂的替代方法。
An adsorption gel was prepared from microalgal waste after extracting biodiesel oil by a simple chemical treatment of crosslinking using concentrated sulfuric acid. The adsorbent exhibited notably high selectivity and adsorption capacity towards Cs+over Na+from aqueous solutions, within the pH range of slightly acidic to neutral. The adsorption followed Langmuir isotherm and the maximum adsorption capacity of the gel for Cs+calculated from Langmuir model was found to be 1.36 mol kg−1. Trace concentration of Cs+ions present in aqueous streams was successfully separated from Na+ions using a column packed with the adsorbent at pH 6.5. The adsorption capacity of the gel towards Cs+in column operation was 0.13 mol kg−1. Although the adsorbed Cs+ions were easily eluted using 1 M hydrochloric acid solution, simple incineration is proposed as an alternative for the treatment of adsorbent loaded with radioactive Cs+ions due to the combustible characteristics of this adsorbent.