研究了日光/Fenton法对辽河油田采油废水处理效果, 并分析了日光/Fenton法好于普通Fenton法的原因。 辽河油田采油废水主要含有苯类和烷烃类化合物, 日光/Fenton法对辽河油田采油废水处理效果与废水水层高度相关, 水层高度升高, COD去除率降低, 日光对本油田废水的穿透能力在1 m左右。 废水水层高度为40 cm左右时, 采油废水经日光/Fenton法处理后, COD由430降至63.2 mg·L-1。 通过紫外可见光谱法、 红外光谱法(FTIR)及X射线衍射法证明了利用日光/Fenton法处理辽河油田采油废水时体系中有聚铁生成, 聚铁的形态与普通Fenton体系生成的聚铁基本相同。 同时利用紫外光谱法研究了苯类及烷烃类的转化方式, 结果表明: 烷烃类在日光/Fenton和Fenton体系中的转化方式基本相同; 而苯类在日光/Fenton体系中的羟自由基作用下转化成具有光敏性的物质。 芳香族中间产物的光敏性是日光/Fenton法比普通Fenton法高效的原因。

The effect of disposing the oil wastewater in Liaohe Oilfield by sunlight/Fenton method was studied in this paper, and the reason why the sunlight/Fenton method was better than the common Fenton method was analyzed. The wastewater mainly contains benzene and alkane compounds. Effect of sunlight/Fenton method on oil field wastewater treatment in Liaohe was related to height of the water layer. The removal rate of aqueous COD decreased when the height of the water layer increased, and the penetration ability of sunlight to this oilfield wastewater was about 1 m. When the height of wastewater was about 40 cm, COD of wastewater reduced from 430 to 63.2 mg·L-1 after treatment of oil wastewater by sunlight/Fenton method. It is proved that the form of the poly ferric compounds generated in the system by using the UV-Vis spectroscopy, infrared spectroscopy (FTIR) and X-ray diffraction method (XRD) is the same as the poly ferric compounds generated by the common Fenton system. At the same time, the transformation processes of benzene and alkanes were studied by UV-Vis spectroscopy which indicated that the transformation processes of alkanes in sunlight/Fenton were as same as the common Fenton method; enzene could be converted into photosensitive molecules activated by hydroxyl radical in sunlight/Fenton system. Thus, the sensitivities of the aromatic intermediates are the reason why the sunlight/Fenton method is more efficient than the common Fenton method.