State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China.
Chemosphere. 2013 Nov;93(11):2877-82. doi: 10.1016/j.chemosphere.2013.08.082. Epub 2013 Sep 27.
Acetylacetone (AcAc) was employed as a photo-activator for the degradation of Acid Orange 7 (AO7) under UV irradiation. The feasibility of this process (named as UV/AcAc) was evaluated through comparison with the well-established UV/H2O2 process in terms of absorption spectrum and the biodegradability of the solutions. A complete decoloration of the AO7 solution could be fulfilled with AcAc at mM level. A self-acceleration phenomenon was observed for the UV/AcAc process. The pseudo first-order decoloration rate constant of AO7 in the UV/AcAc process was several times higher than that in the UV/H2O2 process, depending on the irradiation conditions. The BOD to COD ratio of the solutions increased from below 0.1 to above 0.3, along with a slight mineralization. Based on degradation product analysis, the possible pathways for AO7 degradation in the UV/AcAc process were proposed.
乙酰丙酮（AcAc）被用作光引发剂，在紫外光照射下降解酸性橙 7（AO7）。通过与已建立的 UV/H2O2 工艺相比，从吸收光谱和溶液的生物降解性两方面评估了该工艺（命名为 UV/AcAc）的可行性。在 mM 级别的乙酰丙酮存在下，AO7 溶液可以完全脱色。UV/AcAc 工艺中观察到自加速现象。在 UV/AcAc 工艺中，AO7 的拟一级脱色速率常数比 UV/H2O2 工艺高几倍，具体取决于辐照条件。溶液的 BOD/COD 比值从低于 0.1 增加到高于 0.3，同时略有矿化。基于降解产物分析，提出了在 UV/AcAc 工艺中 AO7 降解的可能途径。
