Department of Chemistry, State University of Maringá, Av. Colombo 5790, Maringá, Paraná 87020-900, Brazil.
Department of Chemistry, State University of Maringá, Av. Colombo 5790, Maringá, Paraná 87020-900, Brazil.
Sci Total Environ. 2017 Mar 1;581-582:1-9. doi: 10.1016/j.scitotenv.2016.11.177. Epub 2017 Jan 7.
This study reports on the investigation of the photodegradation of biodiesel (B100) in contact with water using TiO/HO. The TiO was characterized by X-ray diffraction analysis (XRD), pH point of zero charge (pH) and textural analysis. The results of the experiments were fitted to a quadratic polynomial model developed using response surface methodology (RSM) to optimize the parameters. Using the three factors, three levels, and the Box-Behnken design of experiment technique, 15 sets of experiments were designed considering the effective ranges of the influential parameters. The responses of those parameters were optimized using computational techniques. After 24h of irradiation under an Hg vapor lamp, removal of 22.0% of the oils and greases (OG) and a 33.54% reduction in the total of fatty acid methyl ester (FAME) concentration was observed in the aqueous phase, as determined using gas chromatography coupled with flame ionization detection (GC/FID). The estimate of FAMEs undergo base-catalyzed hydrolysis is at least 3years (1095days) and after photocatalytic treatment using TiO/HO, it was reduced to 33.54% of FAMEs in only 1day.
本研究报告了使用 TiO/HO 研究与水接触的生物柴油（B100）光降解的情况。采用 X 射线衍射分析（XRD）、pH 值零电荷点（pH）和比表面积分析对 TiO 进行了表征。实验结果采用响应面法（RSM）开发的二次多项式模型进行拟合，以优化参数。使用三因素、三水平和 Box-Behnken 实验设计技术，考虑到影响参数的有效范围，设计了 15 组实验。使用计算技术对这些参数的响应进行了优化。在汞蒸气灯照射 24 小时后，在水相中观察到油和油脂（OG）去除了 22.0%，脂肪酸甲酯（FAME）浓度总减少了 33.54%，这是通过气相色谱法与火焰离子化检测（GC/FID）确定的。估计 FAMEs 经历了碱催化水解，至少需要 3 年（1095 天），而在使用 TiO/HO 进行光催化处理后，仅在 1 天内就将 FAMEs 减少到 33.54%。
