| 湖泊沉积物中水溶性有机质对吸附磷的影响 |
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| 引用本文： | 王圣瑞,金相灿,赵海超,周小宁.湖泊沉积物中水溶性有机质对吸附磷的影响[J].土壤学报,2005,42(5):805-811. |
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| 作者姓名： | 王圣瑞 金相灿 赵海超 周小宁 |
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| 作者单位： | 中国环境科学研究院湖泊生态环境研究中心,北京,100012 |
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| 基金项目： | 国家重点基础研究发展规划项目“湖泊富营养化过程与蓝藻水华暴发机理研究”（2002CB412304）资助.致谢中国科学院地球化学研究所吴丰昌研究员等协助了本研究的T0C分析,在此表示感谢. |
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| 摘 要： | 以分别属于不同营养水平的五里湖和东太湖沉积物为研究对象,通过吸附试验,研究了水溶性有机质(DOM)对沉积物吸附磷酸盐等温线和动力学曲线的影响。结果表明:(1)DOM没有改变沉积物吸附磷动力学曲线的基本趋势,在前10 h内,沉积物对磷的吸附具有较大速度,20 h后基本达到吸附平衡;DOM提高了沉积物吸附磷的速度,特别是提高了0-0.5 h内的吸附速度,其中东太湖沉积物由82.34 mg kg-1h-1增加到97.18 mg kg-1 h-1,五里湖沉积物由12.21 mg kg-1h-1增加到59.17 mg kg-1h-1;(2)DOM明显改变了沉积物吸附磷等温线,对沉积物吸附磷具有促进作用,提高了沉积物吸附磷的效率,其中东太湖沉积物,DOM使其对磷的吸附效率由123.3 L kg-1增加到164.8 L kg-1,五里湖沉积物,DOM使其对磷的吸附效率由94.56 L kg-1增加到206.3 L kg-1;(3)DOM对有机质含量较高、严重污染的五里湖沉积物吸附磷的影响大于对有机质含量较低、中营养水平的东太湖沉积物的影响。
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| 关 键 词： | 湖泊沉积物 水溶性有机质 磷酸盐 吸附 |
| 收稿时间： | 2004-07-16 |
| 修稿时间： | 2004-07-162005-04-22 |
EFFECT OF DOM ON PHOSPHATE SORPTION IN LAKE SEDIMENTS |
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| Wang Shengrui,Jin Xiangcan,Zhao Haichao and Zhou Xiaoning.EFFECT OF DOM ON PHOSPHATE SORPTION IN LAKE SEDIMENTS[J].Acta Pedologica Sinica,2005,42(5):805-811. |
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| Authors: | Wang Shengrui Jin Xiangcan Zhao Haichao and Zhou Xiaoning |
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| Affiliation: | Research Center of Lake Environment, Chinese Research Academy of Environment Science, Beijing 100012, China |
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| Abstract: | Effects of DOMs extracted from lake sediments different in trophic level from the Wuli Lake and the East Taihu Lake on phosphate sorption isotherms and sorption kinetics were studied through sorption experiment. The results indicate that: (1) DOM did not show much effect on phosphate sorption kinetics in lake sediments. Phosphate sorption proceeded at a high rate during the first 10 hrs, and basically reached equilibrium after 20 hrs. But the phosphate sorption rate was increased by DOM, especially during the initial period of 0 - 0.5 h, from 82.34 to 97.18 mg kg-1 h-1 in the sediment from the East Taihu Lake, and from 12.21 to 59.17 mg kg-1 h-1 in the sediment from the Wuli Lake; (2) DOM obviously changed the phosphate sorption isotherms of the sediments, suggesting it enhanced the sorption process and improved the efficiency of phosphate sorption on the lake sediments, from 123 .3 to 164.8 L kg-1 on the sediment from the East Taihu Lake and from 94.56 to 206.3 L kg-1 on the sediment from the Wuli Lake; (3) The effect of DOM on phosphate sorption was greater on the sediment from the Wuli Lake that was high in pollution and in organic matter content than that on the sediment from the East Taihu Lake that was moderate in nutrient level and low in organic matter content. |
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| Keywords: | Lake sediment DOM Phosphate Sorption |
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