利用薄膜扩散梯度技术估算红枫湖沉积物磷释放通量
Estimation of the Phosphorus Flux from the Sediment of Hongfeng Lake Using the Zr-Oxide Diffusive Gradient in Thin Films (Zr-Oxide DGT) Technique
查看参考文献34篇
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文摘
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湖水因季节性分层而导致底层滞水带缺氧的亚深水型湖泊,其沉积物内源磷释放对水体磷循环和富营养化有着重要影响。选取典型的高原亚深水型湖泊———贵州红枫湖为研究对象,借助氧化锆薄膜扩散梯度技术获取了5个代表性湖区沉积物有效磷(labile P)的原位、二维、高分辨分布信息,在此基础上估算夏季红枫湖沉积物内源磷释放通量。结果表明,红枫湖后五沉积物有效磷浓度最高,羊昌河、大坝次之,南湖中与北湖中较低。红枫湖沉积物labile P浓度在亚毫米水平上有很大差异,空间分布不均一,时间上夏季磷释放量为6270~ 7999 kg,占全湖水体总磷的22% ~ 28%。沉积物磷释放是红枫湖水体磷的重要来源,在湖泊富营养化防治过程中应予以重视。 |
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其他语种文摘
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Phosphorus(P) released from sediments has a great effect on the lake eutrophication,especially in the deep-water lakes. In this study,in situ two-dimensional,high-resolution distribution of labile P in sediments from five typical lake areas in the Hongfeng lake,a typical sub-deep lake,were characterized using the Zr-oxide diffusive gradients in thin films (DGT) technique,and the P flux in a summer time was accurately estimated. Our results showed that the labile P concentration in Houwu was the highest among five areas of the lake. Concentrations of labile P in sediments of Yangchang and Dam areas were slightly lower than that of Houwu,and the Mid-north and Mid-south areas have the lowest labile P concentrations. The distribution of labile P exhibited large heterogeneity at the sub-millimeter spatial resolution. The calculated P flux based on the diffusion model ranged from 6270 kg to 7999 kg,accounting for 22% to 28% of the total P of the water. Thus,the internal P is an important source for water P in the Hongfeng lake and should be taken seriously in the management of eutrophication. |
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来源
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矿物岩石地球化学通报
,2015,34(5):1014-1020 【核心库】
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DOI
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10.3969/j.issn.1007-2802.2015.05.017
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关键词
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红枫湖
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沉积物
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Zr-oxide DGT
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磷
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高分辨率
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地址
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1.
贵州大学资源与环境工程学院, 环境地球化学国家重点实验室, 贵阳, 550025
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中国科学院地球化学研究所, 环境地球化学国家重点实验室, 贵阳, 550002
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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
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1007-2802 |
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学科
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地质学 |
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基金
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国家科技支撑计划项目
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国家自然科学基金项目
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贵州省项目
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文献收藏号
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CSCD:5581880
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