摘要
对3种典型酚类内分泌干扰物——双酚A（BPA）、辛基酚（OP）和壬基酚（NP）由水相到半透膜被动采样装置（SPMD）的富集动力学进行了实验室研究。研究发现,SPMD对OP和NP具有较好的富集效果,而对于BPA的富集能力较低。在4℃条件下,20 d内3种物质在水相和SPMD相间未达到分配平衡,而在15和25℃时,OP和NP可分别在3-15 d内达到分配平衡。将目标化合物的SPMD和水相分配平衡常数KSPMD实测值与经验计算值进行比较表明,二者之间存在较大偏差。改变水溶液pH值、碱度和硬度条件,观察其对目标化合物在SPMD相中的一日富集质量浓度ρs,1 d的影响。结果表明,在高pH值条件下,酚类目标污染物的离子化可导致其ρs,1 d的降低,而溶液碱度和硬度则对富集速率无显著影响。
This paper presents a laboratory experiment study on the enrichment dynamics of three typical phenolic endocrine disruptors,i.e.bisphenol A（BPA）,4-tert-octylphenol（OP）,and 4-nonylphenol（NP）,on a semi-permeable membrane device（SPMD）.It was found that OP and NP could be uptaken efficiently by SPMD,while the uptake efficiency of BPA was relatively low.Partition balance could not be reached for the three analytes at 4 ℃ during the 20 days period,but could for OP and NP at 15 or 25 ℃ in 3-15 days respectively The comparison between measured values and theoretical values of the lgKSPMD indicated the huge difference among them.The effects of water chemistry（pH,alkalinity,and hardness） on the 1 day uptake concentration of the three analytes by SPMD（ρs,1d） were also investigated.Results showed that ρs,1d of the three analytes all decreased significantly at high pH values,which might be explained by the ionization of analytes in water solution.However,the effects of water alkalinity and hardness on ρs,1d were unremarkable.
基金
国家自然科学基金项目(20807024)
高等学校博士学科点专向科研基金新教师基金(200800551051)
