Santamaría Leticia, Korili Sophia A, Gil Antonio
INAMAT2, Departamento de Ciencias, Universidad Pública de Navarra, Campus de Arrosadía, 31006 Pamplona, Spain.
Materials (Basel). 2021 Nov 13;14(22):6852. doi: 10.3390/ma14226852.
The worldwide rise in biodiesel production has generated an excess of glycerol, a byproduct of the process. One of the most interesting alternative uses of glycerol is the production of solketal, a bioadditive that can improve the properties of both diesel and gasoline fuels. Even with its promising future, not much research has been performed on its toxicity in aqueous environments. In this work, solketal adsorption has been tested with two different commercial adsorbents: an activated carbon (Hydrodarco 3000) and a metal-organic framework (MIL-53). Diclofenac and caffeine were also chosen as emerging contaminants for comparison purposes. The effect of various parameters, such as the adsorbent mass or initial concentration of pollutants, has been studied. Adsorption kinetics with a better fit to a pseudo-second-order model, intraparticle diffusion, and effective diffusion coefficient were studied as well. Various isotherm equation models were employed to study the equilibrium process. The results obtained indicate that activated carbon is more effective in removing solketal from aqueous solutions than the metal-organic framework.
全球生物柴油产量的增加产生了过量的甘油，这是该过程的一种副产品。甘油最有趣的替代用途之一是生产缩酮，一种可以改善柴油和汽油燃料性能的生物添加剂。尽管其前景广阔，但关于其在水环境中的毒性研究却不多。在这项工作中，使用两种不同的商业吸附剂测试了缩酮的吸附性能：一种活性炭（Hydrodarco 3000）和一种金属有机框架（MIL-53）。还选择双氯芬酸和咖啡因作为新兴污染物进行比较。研究了各种参数的影响，如吸附剂质量或污染物初始浓度。还研究了与伪二级模型拟合更好的吸附动力学、颗粒内扩散和有效扩散系数。采用各种等温线方程模型研究平衡过程。所得结果表明，活性炭比金属有机框架更有效地从水溶液中去除缩酮。
