利用生物燃料提取微藻废料吸附去除铯。
Adsorptive removal of cesium using bio fuel extraction microalgal waste.
机构信息
Department of Applied Chemistry, Faculty of Science & Engineering, Saga University, Honjo 1, Saga 840-8502, Japan.
Department of Applied Chemistry, Faculty of Science & Engineering, Saga University, Honjo 1, Saga 840-8502, Japan; Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St. John's, NL, Canada A1B 3X5.
出版信息
J Hazard Mater. 2014 Apr 30;271:196-201. doi: 10.1016/j.jhazmat.2014.02.003. Epub 2014 Feb 12.
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 1M 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.
一种吸附凝胶是通过使用浓硫酸交联的简单化学处理从提取生物柴油油后的微藻废物中制备的。该吸附剂在略酸性至中性 pH 范围内对水溶液中的 Cs(+)表现出明显的高选择性和吸附能力，而对 Na(+)的吸附能力则较低。吸附遵循 Langmuir 等温线，从 Langmuir 模型计算出的凝胶对 Cs(+)的最大吸附容量为 1.36 mol kg(-1)。使用填充有吸附剂的柱子在 pH 6.5 下成功地将痕量浓度的 Cs(+)离子从 Na(+)离子中分离出来。在柱操作中，凝胶对 Cs(+)的吸附容量为 0.13 mol kg(-1)。尽管吸附的 Cs(+)离子很容易用 1M 盐酸溶液洗脱，但由于这种吸附剂具有可燃性，因此建议将其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。
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