| 李茹枫,林建德,冯成洪,邵坚,李艳霞,刘静玲.沉积物不同组分对雌二醇(17β-E2)吸附性能研究[J].农业环境科学学报,2015,34(5):973-978. |
| 沉积物不同组分对雌二醇(17β-E2)吸附性能研究 |
| Adsorption of 17β-E2 on Different Components of Sediments |
| 投稿时间：2015-02-02 |
| DOI：10.11654/jaes.2015.05.021 |
| 中文关键词: 雌二醇 沉积物 有机质 铁锰氧化物 吸附 |
| 英文关键词: 17β-E2 sediment organic matter iron and manganese oxides adsorption |
| 基金项目:北京市高等学校青年英才计划项目(YETP0235);国家水体污染控制与治理科技重大专项(水专项)(2011ZX07209-006) |
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| 中文摘要: |
| 以长江口不同理化性质沉积物为研究基质,以雌二醇为研究对象,探讨沉积物中有机质、铁锰氧化物及矿物组分对沉积物理化性质及雌二醇(17β-E2)吸附的影响,对比分析不同pH值、盐度下不同组分沉积物对17β-E2的吸附性能。结果表明:有机质、铁锰氧化物含量影响沉积物比表面积,17β-E2吸附同时发生在沉积物表面孔隙及层间;不同组分沉积物对17β-E2的吸附量随时间呈线性快速增加趋势,直至吸附平衡;有机质迟滞沉积物对17β-E2的吸附过程,铁锰氧化物的影响相对较小。整体上,17β-E2在沉积物上的吸附量随pH值增加而下降,随盐度增加而增加。 |
| 英文摘要: |
| 17β-E2 has recently become research focus because of its low concentrations, strong hazard and widespread distribution in the environment. However, its environmental behaviors are still unclear. The present study investigated the adsorption behaviors of 17β-E2 on different composition of sediments(e.g., organic matter, iron and manganese oxides, and clay minerals) from the Yangtze Estuary. The effects of pH and salinity on the adsorption capacity of 17β-E2 were also examined. The specific surface area of sediments was closely related to organic matter and iron and manganese oxides. Adsorption of 17β-E2 simultaneously occurred on the surface and at the interlayer of the sediments. The adsorption capacity sharply increased with adsorption time until adsorption equilibrium. The adsorption isotherms were fitted well with different adsorption equilibrium models. Organic matter delayed the adsorption process, while iron and manganese oxides exhibited little impact on the adsorption. Overall, the adsorption capacity of 17β-E2 on the sediments decreased with pH rise, but increased with salinity elevation. |
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