表面活性剂对水溶液中萘普生光解行为的影响

摘要

为探究水体中表面活性剂对萘普生(NPX)的光解行为影响,研究了不同类型的表面活性剂存在下的 NPX 光解行为.结果表明,NPX的吸收峰主要在200~250 nm 处,与十二烷基苯磺酸钠(SDBS)、吐温-80(Tween-80)的吸收峰基本重合,但与十六烷基三甲基溴化铵(CTAB)的吸收峰基本没有重叠.CTAB为阳离子型表面活性剂,对 NPX的光解产生促进作用;SDBS 为阴离子型表面活性剂,Tween-80为非离子型表面活性剂,对 NPX的光解产生抑制作用,且SDBS的抑制作用更强.NPX的光解能力受 pH的影响表现为酸性> 碱性>中性,且CTAB存在时光解能力更强.%Effects of surfactants on photo-degradation of naproxen(NPX)in aqueous solution were investigated using different surfactants.Results showed that NPX absorption peak were at 200-250 nm,overlapped with an anionic surfactant sodium dodecyl benzene sulfonate(SDBS)and a non-ionic surfactant Tween-80,but a cationic surfactant cetriamonium bromide(CTAB).CTAB enhanced the photo-degradation of NPX,while SDBS and Tween-80 not.The inhibition of SDBS was stronger than Tween-80.The effect of pH on NPX photo-degradation showed acidic condition>basic condition>central condition.NPX photo-degradation was enhanced when the presence of CTAB.