| 太湖不同营养水平湖区沉积物理化性质和磷的垂向变化 |
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| 引用本文： | 李 江,金相灿,姜 霞,刘利军.太湖不同营养水平湖区沉积物理化性质和磷的垂向变化[J].环境科学研究,2007,20(4):64-69. |
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| 作者姓名： | 李 江 金相灿 姜 霞 刘利军 |
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| 作者单位： | 1.宁夏大学 化学化工学院,宁夏 银川 750021;中国环境科学研究院 湖泊生态环境创新基地 国家环境保护湖泊污染控制重点实验室,北京 100012;宁夏医学院 基础学院,宁夏 银川 750004 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)
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国家自然科学基金 |
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| 摘 要： | 利用SMT标准测试程序对太湖3个不同营养水平湖区表层10 cm柱状沉积物进行磷赋存形态的垂向分析，并在此基础上讨论了沉积物有机质总量(w(OM))，细颗粒组成与磷赋存形态间的相关关系.结果表明,研究区各采样点沉积物的w(TP)平均值为437～1 650 mg/kg,最高为1 809 mg/kg; w(OM)平均值为17.93～38.76 mg/g;沉积物颗粒组成以粉砂和粘粒为主,占总量的49.64%～83.57%.不同湖区沉积物磷形态的垂向分布规律不同,总体上TP，无机磷(IP)，铁铝结合态磷(Fe/Al-P)表现出在表层富集的现象, 钙结合态磷(Ca-P)和有机磷(OP)随深度的变化不大; w(OM)自表层向下逐渐降低. 无机磷占沉积物中总磷的比例较大,且其含量与Fe/Al-P的含量密切相关.Fe/Al-P占TP的比例随沉积物污染程度的增加而升高,是与人类活动密切相关的;有机质总量与OP显著相关;粘粒比例随污染程度的增加逐渐增大.
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| 关 键 词： | 沉积物 磷形态 垂向变化 太湖 |
| 文章编号： | 1001-6929（2007）04-0064-06 |
| 收稿时间： | 2006/11/13 0:00:00 |
| 修稿时间： | 2006-11-132007-01-17 |
Vertical Changes of Physiochemical Characteristics and Phosphorus Concentrationsof Sediments from Different Trophic Regions of Taihu Lake |
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| LI Jiang,JIN Xiang-can,JIANG Xia and LIU Li-jun.Vertical Changes of Physiochemical Characteristics and Phosphorus Concentrationsof Sediments from Different Trophic Regions of Taihu Lake[J].Research of Environmental Sciences,2007,20(4):64-69. |
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| Authors: | LI Jiang JIN Xiang-can JIANG Xia and LIU Li-jun |
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| Affiliation: | 1.College of Chemistry and Chemistry Engineering, University of Ningxia, Yinchuan 750021, China ;2.State Environmental Protection Key Laboratory for Lake Pollution Control; Research Center of Lake Eco-environment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; 3.School of Basic Medical Science, Ningxia Medical College, Yinchuan 750004, China |
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| Abstract: | Vertical changes of phosphorus concentration in the sediments (0～10 cm)from the different trophic regions of Taihu Lake were investigated by using SMTprocedure. The relationships among phosphorus fractions, organic matter and particle constitutes were also discussed. The results indicate that the average concentrations of total phosphorus (TP) and organic matter (OM) are in the range of437～1 650 mg/kg and 17.93～38.76 mg/g respectively. The maximumconcentration of TP is 1 809 mg/kg. The main particles of sediment aresilt and clay, which account for 49.64%～83.57%.The concentrations of phosphorous fractions in their vertical distributions in sediment vary in different trophic lake regions. The concentrations of TP, inorganic phosphorus (IP) and Fe/Al-P decrease with the depths inthe sediment; and the concentrations of Ca-P and organic phosphorus (OP) show noobvious change with depth. The values of OM increase with the depths in the sediment. IP is the major fraction of phosphorus and has a good relationship with Fe/Al-P. Fe/Al-P is influenced significantly by people activities, with its concentration increasing with lake eutrophication. OM has great relationship with OP.The percentage of clay increases with the contamination. |
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| Keywords: | sediment phosphorus fractions trophie level Taihu Lake |
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