研究报告
许晓伟,黄岁樑.海河沉积物对菲的吸附解吸行为研究[J].环境科学学报,2011,31(1):114-122
海河沉积物对菲的吸附解吸行为研究
- Adsorption-desorption behaviors of phenanthrene on sediments from the Haihe River
- 基金项目：国家自然科学基金(No.51079068);天津市科技支撑计划重点项目(No.09ZCGYSF00400);国家水体污染控制与治理重大专项(No.2009ZX07209-001,2008ZX07314-005-011);水利部公益性行业科研专项子课题(No.200801135)
- 作者
- 单位
- 许晓伟
- 水环境数值模拟研究室, 环境污染过程与基准教育部重点实验室, 天津市城市生态环境修复与污染防治重点实验室, 环境科学与工程学院南开大学, 天津 300071
- 黄岁樑
- 水环境数值模拟研究室, 环境污染过程与基准教育部重点实验室, 天津市城市生态环境修复与污染防治重点实验室, 环境科学与工程学院南开大学, 天津 300071
- 摘要：采用北运河坝河断面、海河干流邓善沽断面及葛沽镇断面表层沉积物及南开花园土为吸附剂,以菲为吸附质进行一系列吸附动力学和吸附-解吸平衡实验研究.结果表明,菲在各颗粒物上的吸附动力学过程,在2～12h内基本可达吸附平衡,刚开始吸附速率很快,然后迅速降低,并逐渐稳定;菲在各颗粒物上的等温平衡吸附可用线性等温线方程及Freundlich方程较好地拟合;不同来源颗粒物对菲的吸附能力随颗粒物中有机质含量增加而增强;葛沽镇颗粒物经高温灼烧处理后,其吸附能力明显降低;各天然颗粒物及不同温度灼烧处理的颗粒物对菲的解吸行为存在不同程度地滞后,灼烧颗粒物的滞后性远远大于原颗粒物,颗粒物中的有机质组分及性质对菲的解吸滞后有重要影响.
- Abstract：Surface sediments from three typical sampling sites of the Haihe River and the Beiyunhe River and surface soil of Nankai University Garden were collected as sorbents,and sorption-desorption behaviors of phenanthrene onto/off of the different particles were experimentally investigated. The sorption of phenanthrene reached equilibrium in 2～12 hours,with a high sorption rate initially and a low sorption rate immediately thereafter. The sorption isotherm of phenanthrene could be described well by the linear equation and the Freundlich equation. The sorption amount of phenanthrene onto particles was directly proportional to the content of organic matter in the particles. The amount of phenanthrene sorbed by Geguzhen sediments which were sintered at a high temperature was much lower than that by the original sediment. Desorption hysteresis of phenanthrene on different sample particles were different,and the desorption hysteresis of phenanthrene on the sintered particles was more pronounced than on the natural particles. The differences in composition,structure and properties of organic matters of particles were the main factors affecting the desorption hysteresis behavior.
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