Posgrado en Ingeniería y Ciencias Aplicadas FCQI-CIICAp, Universidad Autónoma del Estado de Morelos, Avenida Universidad 1001, Col. Chamilpa, Cuernavaca Morelos 62209, México.
Water Sci Technol. 2010;62(1):77-84. doi: 10.2166/wst.2010.252.
The degradation of used cooking safflower oil aqueous solutions by photolysis, Fenton, and photo Fenton under solar light is reported. The processes were carried out in a photochemical reactor with recirculation. Operating variables such as, pH, oil concentration and molar ratio of [H(2)O(2)]:[oil] were investigated to test their effects on the treatment efficiency of Fenton process. Also the iron catalyzed decomposition of hydrogen peroxide in the solar photo Fenton reaction was studied under different experimental conditions. The degree of oil oxidation was monitored by the measurements of chemical oxygen demand (COD) analyses. It was found that at pH 2.6 and a molar ratio of [H(2)O(2)]:[oil] of 489:1 were more efficient for COD abatement. The experimental results showed that the sole effect of the solar irradiation (photolysis) aided to decrease approximately 65% of COD at neutral pH in a reaction time period of 15 h; whereas a decrease of 47% and approximately 90% of COD was obtained by Fenton and photo Fenton treatment, respectively, after a reaction time of 50 min. It was observed a decrease in the decomposition of H(2)O(2) in the solar photo Fenton process, in subsequent additions of H(2)O(2), and H(2)O(2) + Fe(2+).
报告了用过的红花油水溶液在太阳光下通过光解、芬顿法和光芬顿法降解的情况。这些过程在带有循环的光化学反应器中进行。考察了操作变量，如 pH 值、油浓度和[H2O2]：[油]摩尔比，以测试它们对芬顿法处理效率的影响。还研究了在不同实验条件下铁催化的过氧化氢在太阳能光芬顿反应中的分解。通过化学需氧量（COD）分析来监测油的氧化程度。结果发现，在 pH 值为 2.6 和[H2O2]：[油]摩尔比为 489:1 时，COD 的去除效率更高。实验结果表明，在 15 小时的反应时间内，单独的太阳辐射（光解）有助于在中性 pH 值下降低约 65%的 COD；而在 50 分钟的反应时间后，芬顿法和光芬顿法处理分别降低了 47%和约 90%的 COD。在太阳能光芬顿过程中观察到 H2O2 的分解减少，随后添加 H2O2 和 H2O2 + Fe2+。
