• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Lakes & Reservoirs >Forms of particulate phosphorus in suspension and in bottom sediment in the Danube Delta
【24h】

Forms of particulate phosphorus in suspension and in bottom sediment in the Danube Delta

机译：多瑙河三角洲悬浮液和底部沉积物中磷颗粒的形式

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In the summer of 1995, samples of suspended solids and bottom sediments were collected from the lower course of the Danube, downstream from potential pollution sources such as tributaries draining industrialised and densely populated watersheds (the Jiu, Olt, Arges and Ialomita rivers) or big cities on the border of the river (Tulcea, Galati, Braila), and from the Danube Delta. Chemical and toxicological analyses were carried out on these samples. In the present paper, the results of the measurements of the forms of particulate phosphorus are discussed. Phosphorus occurring in the bottom sediments and the suspended solids has various origins and chemical forms. These forms may be operationally defined as: organic phosphorus (OP), apatite inorganic phosphorus (AP) and non-apatite inorganic phosphorus (NAIP). The AP shows low variability, ranging from 350 to 400 p.p.m. for suspended solids and from 425 to 500 p.p.m. for bottom sediments. This is essentially due to the detrital origin of this form. These values are typical for freshwater sediments in European rivers. The NAIP, which originates both from natural sources and from human pollution, shows a high variability. This indicates that the nutrient pollution is derived from both point and non-point sources in the watershed. The NAIP concentrations of 800 p.p.m. (Vadul Oii) and 850 p.p.m. (Oltenita) are very high (fourfold the average for European rivers), indicating that strong anthropogenic sources of phosphorus are present in the lower Danube watershed. As the NAIP is potentially bioavailable, its high concentration may contribute to eutrophication in the lower Danube and the Danube Delta.
机译：1995年夏季，从多瑙河下游，潜在的污染源（例如，支流工业化和人口稠密的集水区（九河，奥尔特河，阿尔热河和雅洛米塔河）或大流域）下游采集了悬浮固体和底部沉积物的样本。沿河边界的城市（塔尔恰，加拉茨，布赖拉），以及多瑙河三角洲。对这些样品进行了化学和毒理学分析。在本文中，讨论了颗粒磷形态的测量结果。底部沉积物中的磷和悬浮固体中的磷有多种来源和化学形式。这些形式可在操作上定义为：有机磷（OP），磷灰石无机磷（AP）和非磷灰石无机磷（NAIP）。 AP显示出低变异性，范围从350到400p.p.m。适用于425至500 p.p.m.的悬浮固体用于底部沉积物。这主要是由于这种形式的有害来源。这些值是欧洲河流中淡水沉积物的典型值。来自自然资源和人类污染的NAIP表现出很大的可变性。这表明营养物污染来自流域的点源和非点源。 NAIP浓度为800 p.p.m. （瓦杜尔·瓦伊（Vadul Oii））和下午850点（Oltenita）很高（欧洲河流平均水平的四倍），这表明在多瑙河下游流域存在大量的人为磷源。由于NAIP具有潜在的生物利用性，因此其高浓度可能有助于多瑙河下游和多瑙河三角洲的富营养化。

著录项

  • 来源
    《Lakes & Reservoirs》 |2000年第2期|105-110|共6页
  • 作者

    V. Bostan; J. Dominik; M. Bostina; M. Pardos;

  • 作者单位

    Institute F.-A. Forel The University of Geneva 10 Route de Suisse CH-1290 Versoix Switzerland and National Institute of Marine Geology and Geo-ecology (GeoEcoMar) 23–25 D. Onciul Str. RO-70318 Bucharest Romania;

    Institute F.-A. Forel The University of Geneva 10 Route de Suisse CH-1290 Versoix Switzerland and;

    National Institute of Marine Geology and Geo-ecology (GeoEcoMar) 23–25 D. Onciul Str. RO-70318 Bucharest Romania;

    Institute F.-A. Forel The University of Geneva 10 Route de Suisse CH-1290 Versoix Switzerland and Institute F.-A. Forel The University of Geneva 10 Route de Suisse CH-1290 Versoix Switzerland and;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Danube Delta; fractionation; particulate phosphorus; sediment; suspended solids;

    机译：多瑙河三角洲;分馏;颗粒磷;沉积物;悬浮固体;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号