| 有机污染物在水体表面微层的富集行为 |
| 摘要点击 1043 全文点击 1602 投稿时间：1998-10-10 |
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| 中文关键词 表面微层 富集行为 邻苯二甲酸酯 表面活性剂 |
| 英文关键词 microlayer enrichment phthalates surfactant |
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| 中文摘要 |
| 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。 |
| 英文摘要 |
| Enrichment behavior of dibutyl phthalate(DBP),di-(2-ethyl)hexyl phthalate (DEHP)and anionic surfactant in the waters surface microlayer were studied in this paper.Results of field analysis showed that the phthalates enriched in the microlayer of small blocked lakes,and enrichment multiple ranged between 1～11,being strongly affected by the physical.chemical properties of water and collection methods.Study in indoor microcosm revealed that DBP amd DEHP enriched in the surface microlayer of the microcosm with the enrichment factors being 2.81 and 1.98 respectively.Algae,particulate and humic acid also gathered in the surface microlayer.When surfactant and humic acid were added,the enrichment of the phthalates decreased with their concentrations.Study 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 destroyed.Concentration of surfactant in water could also influence the enrichment. |
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