有机污染物在水体表面微层的富集行为

研究邻苯二甲酸二丁酯（ＤＢＰ），邻苯二甲酸二异辛酯（ＤＥＨＰ）和阴离子表面活性剂在水体表面微层的富集行为．现场分析结果表明邻苯二甲酸酯在小型封闭湖泊表面微层中存在富集现象，富集倍数在１～１１之间，湖水的理化性质及采样方式均影响富集倍数的大小．室内微宇宙研究表明ＤＢＰ和ＤＥＨＰ在微宇宙水体表面微层中均存在富集现象，富集倍数分别为２．８１和１．９８，藻类、颗粒物和腐殖酸也同时在微宇宙水体表面微层中富集．当水体中加入表面活性物质和腐殖酸时，邻苯二甲酸酯（ＤＢＰ、ＤＥＨＰ）在表面微层的富集倍数随加入的２种物质浓度的增大而降低．对阴离子表面活性剂的富集动力学研究表明，当表面微层遭到破坏后，其在表面微层达富集平衡需较长时间，水体浓度也影响富集倍数

Enrichment Behavior of Organic Pollutants in Waters Microlayer

Enrichment behavior of dibutyl phthalate(DBP),di(2ethyl)hexyl phthalate (DEHP)and anionic surfactant in the waters surface microlayer were studied in this paperResults of field analysis showed that the phthalates enriched in the microlayer of small blocked lakes,and enrichment multiple ranged between 111,being strongly affected by the physicalchemical properties of water and collection methodsStudy in indoor microcosm revealed that DBP amd DEHP enriched in the surface microlayer of the microcosm with the enrichment factors being 281 and 198 respectivelyAlgae,particulate and humic acid also gathered in the surface microlayerWhen surfactant and humic acid were added,the enrichment of the phthalates decreased with their concentrationsStudy on the enrichment dynamics of anionic surfactant showed that long period of time was needed for the surface to reach enrichment equilibrium in the surface microlayer after it was destroyedConcentration of surfactant in water could also influence the enrichment