达里诺尔湖磷赋存特征及底泥释放影响因素

杨旭; 李畅游; 李文宝; 赵胜男; 郝世祺

doi:10.13961/j.cnki.stbctb.2018.04.015

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达里诺尔湖磷赋存特征及底泥释放影响因素

试验研究

- 达里诺尔湖磷赋存特征及底泥释放影响因素
- Characteristics of Phosphorus Occurrence and Influence Factors of Sediment Release in Dali-Nor Lake
- 水土保持通报 2018年38卷第4期页码：92-97
- 作者机构：
  
  内蒙古农业大学水利与土木建筑工程学院,内蒙古,呼和浩特,010018
- 作者简介：
- 基金信息：
  
  国家自然科学基金项目“冻融过程中湖泊污染物多介质迁移转化规律及机制研究”（51339002），“达里诺尔湖沉积物中正构烷烃类型演变及其对水环境变化的响应”（51469025），“冻融过程中污染物在湖泊冰水双介质体系迁移作用及机理研究”（51669022）;内蒙古自治区自然科学基金项目“现代沉积过程中内蒙古寒旱区达里诺尔湖氮、磷等营养元素季节迁移特征”（2016MS0552）;中国博士后科学基金（2014M562495XB）
- DOI：10.13961/j.cnki.stbctb.2018.04.015
  中图分类号：
- 纸质出版：2018
- 稿件说明：
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杨旭, 李畅游, 李文宝, 等. 达里诺尔湖磷赋存特征及底泥释放影响因素[J]. 水土保持通报, 2018,38(4):92-97.

YANG Xu, LI Changyou, LI Wenbao, et al. Characteristics of Phosphorus Occurrence and Influence Factors of Sediment Release in Dali-Nor Lake[J]. Bulletin of Soiland Water Conservation, 2018, 38(4): 92-97.
杨旭, 李畅游, 李文宝, 等. 达里诺尔湖磷赋存特征及底泥释放影响因素[J]. 水土保持通报, 2018,38(4):92-97. DOI： 10.13961/j.cnki.stbctb.2018.04.015.

YANG Xu, LI Changyou, LI Wenbao, et al. Characteristics of Phosphorus Occurrence and Influence Factors of Sediment Release in Dali-Nor Lake[J]. Bulletin of Soiland Water Conservation, 2018, 38(4): 92-97. DOI： 10.13961/j.cnki.stbctb.2018.04.015.

摘要

[目的]揭示封闭性内陆湖磷组成特点及底泥释放影响因素，为控制达里湖磷元素污染提供理论支持。[方法]对达里诺尔湖水体总磷（TP）、溶解性总磷（DTP）、溶解性无机磷（DIP），沉积物形态磷进行监测，并利用因子分析的方法对影响沉积物底泥释放的因素分类讨论。[结果]达里湖上覆水总磷（TP）均值2.00±0.02 mg/L，间隙水TP均值2.50±0.02 mg/L，沉积物TP在206.09~940.49 mg/kg之间。沉积物中无机磷（IP）占TP的47.9%，是沉积物主要的磷形态之一。钙磷（Ca-P）是IP中含量最多的形态磷（217.76±47.01 mg/kg），其次为铁铝结合态磷（Fe/Al-P，62.73±28.34 mg/kg）和交换态磷（Ex-P，36.50±19.13 mg/kg），有机磷（OP，200.28±135.13 mg/kg）含量占TP的41.8%；通过因子分析法将影响底泥释放的因素分为三类：沉积物TP，Ca-P，Fe/Al-P和生物有效性磷含量归为沉积物磷因子；水体pH，DO，Eh值以及间隙水磷含量归为界面影响因子；湖水水深归为湖泊自身特征因子。[结论]达里湖存在沉积物磷底泥释放的风险，根据因子分析的结果可知，影响沉积物底泥释放的因素分为沉积物磷、水—沉积物界面理化指标和湖水水深3大类。

Abstract

[Objective] In order to reveal the characteristics of phosphorus composition in closed inland lake

and the influencing factors of endogenous release.[Methods] The phosphorus content in different medium of Dali-Nor Lake was determined. Using factor analysis to classify the factors affecting sediment release.[Results] The average value of total phosphorus (TP) in the water on Dali-Nor Lake was 2.00±0.02 mg/L

and the mean value of interstitial water TP was 2.50±0.02 mg/L. The sediment TP is between 206.09 to 940.49 mg/kg. Inorganic phosphorus (IP) in sediments accounts for 47.9% of TP

which is one of the main forms of phosphorus in sediments. Followed by iron-aluminum bound phosphorus (Fe/Al-P

62.73±28.34 mg/kg) and exchangeable phosphorus (Ex-P

36.50±19.13 mg/kg) By using the factor analysis method to analyze the influence of 13 sediments release indicators

there are 4 main factors

the 13 indexes are divided into 3 categories:TP

Ca-P

Fe/Al-P and bioavailability of phosphorus content in sediments classified as phosphorus in sediments and interstitial water factor; phosphorus concentrations of pH

Eh of the water as the interface influence factor; The third is water depth to lakes characteristic factor.[Conclusion] There is a risk of release of sediment phosphorus sediment in Dali-Nor Lake. According to the results of factor analysis

the factors affecting sediment release are divided into three categories:sediment phosphorus

water-sediment interface physical and chemical indicators and lake water depth.

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