| 引用本文: | 李宝,范成新,丁士明,张路,钟继承,尹洪斌,赵斌.滇池福保湾沉积物磷的形态及其与间隙水磷的关系.湖泊科学,2008,20(1):27-32. DOI:10.18307/2008.0104 |
| LI Bao,FAN Chengxin,DING Shiming,ZHANG Lu,ZHONG Jicheng,YIN Hongbin,ZHAO Bin.Phosphorus species in sediments and their relationships with soluble phosphorus concentrations in interstitial waters of Fubao Bay in Lake Dianchi. J. Lake Sci.2008,20(1):27-32. DOI:10.18307/2008.0104 |
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| 滇池福保湾沉积物磷的形态及其与间隙水磷的关系 |
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李宝1,2, 范成新1, 丁士明1, 张路1, 钟继承1,2, 尹洪斌1,2, 赵斌3
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1.中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室, 南京 210008;2.中国科学院研究生院, 北京 100049;3.西安建筑科技大学, 西安 710055
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| 摘要: |
| 研究了滇池福保湾沉积物中磷的地球化学形态及间隙水中PO43--P含量的垂向分布特征.福保湾沉积物磷形态空间差异大,河口区TP高达(5630.59±424.25)mg/kg,东西沿岸区TP只有200-300mg/kg,无机磷(I-P)是TP的主要部分,占TP的55%-74%,铁/铝结合态磷(Fe/Al-P)是I-P的主要组成部分,约占I-P的90%,不稳定性磷∞P)含量很低,只占TP含量的0.5%.福保湾沉积物具有极高的Fe/Al-P含量,说明湾内具有很高的内源磷负荷,这与福保湾水体严重富营养化和藻类暴发关系密切.湖湾沉积磷的垂向分布规律较复杂,但基本上是随深度增加而减小,说明福保湾周边区域近几年人类活动作用加强,褐保湾污染有加重的趋势.在湾内不同区域应用Peeper(渗吸膜式)技术,获得了间隙水中PO43-P的垂向分布特征,PO43--P浓度自上覆水向下层间隙水呈先升后降,反映它们有自间隙水向上覆水扩散的趋势.福保湾间隙水PO43--P浓度同沉积物L-P含量具有显著正相关性(α=0.05),但Fe/Al-P、Ca-P、org-P和TP含量未发现有明显的相关关系. |
| 关键词: 沉积物 磷 形态分布 Peeper 间隙水 滇池 |
| DOI：10.18307/2008.0104 |
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| 基金项目:国家高技术研究发展计划(863)项(2005AA601010050201);国家自然科学基金项目(20577053,40601087);中国科学院知识创新工程项目(KZCX3-SW-348)联合资助. |
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| Phosphorus species in sediments and their relationships with soluble phosphorus concentrations in interstitial waters of Fubao Bay in Lake Dianchi |
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LI Bao1,2, FAN Chengxin1, DING Shiming1, ZHANG Lu1, ZHONG Jicheng1,2, YIN Hongbin1,2, ZHAO Bin3
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1.State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, CAS, Nanjing 210008, P. R. China;2.Graduate School of Chinese Academy of Sciences, Beijing 100049, P. R. China;3.Xi'an University of Architecture and Technology, Xi'an 710055, P. R. China
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| Abstract: |
| This paper presents investigations on geochemical species of phosphorus in sediments and vertical distributions of PO43--Pin interstitial waters of Fubao Bay in Lake Dianchi. The sediments of Fubao Bay had high TP contents, with the maximum value of(5630.59±424.25)mg/kg. I-P(inorganic phosphorus) was the major part of TP, which was about 55%-74% of TP. Fe/Al-P (P bound to Al, Fe and Mn oxides and hydroxides) was the major part of I-P, which was about 90% of I-P. The contents of L-P(labile phosphorus)were very low, which was about 0.5％of TP. The Fe/Al-P contents in sediments were very high, which were highly correlated withhigh eutrophication phenomenon and algae blooming events in Fubao Bay, implying a strong diffusion trend for sediment phosphorusin Fubao Bay. Vertical distributions of sediment phosphorus species were complicated, exhibiting a little disorder in both increasedand decreased trends with the depth. This feature was related to the ecosystem conditions, pollutant discharge and sediment dynamicconditions in Fubao Bay. Peeper technique (in situ dialysis membrane samplers) was used to sample interstitial waters in sediments, andvertical distributions of PO43--P were achieved in the waters. The results showed that concentrations of PO43--P in interstitial waters hadgeneral increases followed by decreases with the depth, reflecting a possible diffusion trend for PO43--P from interstitial waters to overlyingwaters. Regression analyses showed that concentrations of PO43--P in the interstitial waters were positively correlated with L-P contents |
| Key words: Sediment phosphorus species distribution Peeper interstitial water Lake Dianchi |
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