| 太湖和呼伦湖沉积物对磷的吸附特征及影响因素 |
| 摘要点击 4707 全文点击 2109 投稿时间：2013-07-25 修订日期：2013-10-18 |
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| 中文关键词 太湖 呼伦湖 沉积物 磷 吸附 pH |
| 英文关键词 Lake Taihu Lake Hulun sediment phosphorus adsorption pH |
| 作者 | 单位 | E-mail | | 揣小明 | 河南理工大学应急管理学院, 安全与应急管理研究中心, 焦作 454000
南京大学环境学院, 污染控制与资源化研究国家重点实验室, 南京 210046 | chuaixm@hpu.edu.cn | | 杨柳燕 | 南京大学环境学院, 污染控制与资源化研究国家重点实验室, 南京 210046 | yangly@nju.edu.cn | | 程书波 | 河南理工大学应急管理学院, 安全与应急管理研究中心, 焦作 454000 | | | 陈小锋 | 南京大学环境学院, 污染控制与资源化研究国家重点实验室, 南京 210046 | | | 穆云松 | 中国环境科学研究院, 北京 100012 | |
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| 中文摘要 |
| 为了探索我国南北方湖泊沉积物对磷吸附特征的差异性，选取太湖和呼伦湖为研究对象，通过室内模拟实验，研究我国南北方典型代表湖泊沉积物对磷的吸附特征及其影响因素. 结果表明：① 太湖和呼伦湖沉积物对磷的最大吸附量分别为1428.57 mg·kg-1和56.81 mg·kg-1，前者对磷吸附容量远远高于后者，对上覆水体中磷削减发挥更重要的作用；② 与呼伦湖相比，太湖沉积物颗粒直径更小，比表面积更大，其对磷吸附能力更强；③ 两个湖泊沉积物磷吸附平衡时对磷的吸附量与Al、Fe、Mn总含量呈正相关关系 （P<0.05），与活性Al、Fe、Si、Mn呈显著正相关（P<0.01），与Si元素含量呈显著负相关（P<0.01），故Al、Fe、Mn总含量相对较高、Si含量相对较低的太湖沉积物对磷的吸附能力更强；④ 随着上覆水pH值的上升，两个湖泊沉积物对磷吸附能力均呈现下降的趋势，且pH上升对太湖沉积物磷吸附行为影响更大，因此，沉积物特性和上覆水pH值影响湖泊水体磷行为. |
| 英文摘要 |
| Lake Taihu and Lake Hulun in southern and northern China were selected for the investigation of differences in the characteristics and influencing factors of phosphorus (P) adsorption on the sediments of these two lakes by laboratory simulation experiment. The results showed that: ① The P adsorption capacity of sediment in Lake Taihu was much higher than that in Lake Hulun, and the maximum adsorption capability for the sediments in these two lakes was 1428.57 mg·kg-1 and 56.81 mg·kg-1, respectively; ② Compared with the sediments in Lake Hulun, the particle diameters from sediments in Lake Taihu were much smaller, and their specific surface areas were much larger, so their P adsorption capacity were much higher; ③ The equilibrium adsorbed amounts in these two lakes were correlated with the total amounts of Al, Fe, Mn(P<0.05) and significantly correlated to the contents of active Al, Fe, Si, Mn (P<0.01). However, there was significant negative correlation between the equilibrium adsorbed amounts and total Si contents for the sediments in these two lakes (P<0.01);④ The P adsorption capacity decreased as pH values in the overlying water increased, and the increase of pH values affected the adsorption behavior of phosphorus on the sediments in Lake Taihu much more obviously. Therefore, the characteristics of sediments and the variations of pH values in the overlying water affected the adsorption behavior of P on sediments in lake water body. |
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