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首页> 外文期刊>Environmental Pollution >Effects of riverine suspended particulate matter on the post-dredging increase in internal phosphorus loading across the sediment-water interface
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Effects of riverine suspended particulate matter on the post-dredging increase in internal phosphorus loading across the sediment-water interface

机译：河流悬浮颗粒物对整个沉积物-水界面中内部磷负荷的疏d后增加的影响

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摘要

Dredging is frequently used in the river mouths of eutrophic lakes to reduce internal phosphorus (P) loading from the sediment. However, the accumulation of P-adsorbed suspended particulate matter (SPM) from the inflowing rivers negatively affects the post-dredging sediment-water interface and ultimately increases internal P loading. Here, a 360-d experiment was carried out to investigate the influence of riverine SPM on the efficacy of dredging in reducing internal P loading. SPM was added to dredged and undredged sediments collected from the confluence area of Lake Chaohu. Several parameters related to internal P loading, including oxygen profile, soluble reactive P, and ferrous iron across the sediment-water interface, organic matter, alkaline phosphatase activity, and P fractions, were measured throughout the experimental period. The results showed that the P content (especially mobile P) in the sediment increased to the pre-dredging level with the accumulation of SPM in the dredged sediment. In addition, the P flux across the sediment-water interface increased with the accumulation of SPM. Several characteristics of SPM, including high organic matter content, mobile P, high activity of alkaline phosphatase, and high biological activity, were considered correlated with the post-dredging increase in internal P loading. Overall, this study showed that the heavily contaminated riverine SPM regulates the long-term efficacy of dredging as a nutrient management option in the confluence area. Management is needed to avoid or reduce this phenomenon during dredging projects of this nature. (C) 2015 Elsevier Ltd. All rights reserved.
机译：富营养化湖泊的河口经常进行疏ging，以减少沉积物中的内部磷（P）含量。但是，来自流入河流的P吸附的悬浮颗粒物（SPM）的积累会对疏affect后的沉积物-水界面产生负面影响，并最终增加内部P的负荷。在这里，进行了3​​60天的实验，以研究河流SPM对疏internal降低内部P负荷的功效的影响。将SPM添加到从巢湖合流地区收集的疏ed和未疏sediment沉积物中。在整个实验期间，测量了与内部P负载相关的几个参数，包括氧分布，可溶性P和穿过沉积物-水界面的二价铁，有机物，碱性磷酸酶活性和P分数。结果表明，随着疏PM底泥中SPM的积累，底泥中的磷含量（尤其是活动性磷）增加到疏-前水平。另外，穿过沉积物-水界面的P通量随着SPM的积累而增加。 SPM的几个特征，包括高有机质含量，可移动的P，碱性磷酸酶的高活性和高的生物活性，被认为与内部P负荷的挖掘后增加相关。总体而言，这项研究表明，受污染严重的河流SPM调节了汇合区疏as作为养分管理选择的长期功效。在这种性质的疏projects工程期间，需要管理层避免或减少这种现象。 （C）2015 Elsevier Ltd.保留所有权利。

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  • 来源
    《Environmental Pollution》 |2016年第4期|165-172|共8页
  • 作者

    Liu Cheng; Shao Shiguang; Shen Qiushi; Fan Chengxin; Zhang Lei; Zhou Qilin;

  • 作者单位

    Chinese Acad Sci, Nanjing Inst Geog & Limnol, State Key Lab Lake Sci & Environm, 73 East Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China|Univ Chinese Acad Sci, Beijing 100049, Peoples R China;

    Hohai Univ, Coll Hydrol & Water Resource, Nanjing 210098, Jiangsu, Peoples R China;

    Chinese Acad Sci, Nanjing Inst Geog & Limnol, State Key Lab Lake Sci & Environm, 73 East Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China;

    Chinese Acad Sci, Nanjing Inst Geog & Limnol, State Key Lab Lake Sci & Environm, 73 East Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China;

    Chinese Acad Sci, Nanjing Inst Geog & Limnol, State Key Lab Lake Sci & Environm, 73 East Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China;

    Chinese Acad Sci, Nanjing Inst Geog & Limnol, State Key Lab Lake Sci & Environm, 73 East Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China|Univ Chinese Acad Sci, Beijing 100049, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Suspended particulate matter; Dredging; Internal phosphorus loading; Sediment-water interface; Lake Chaohu;

    机译：悬浮颗粒物疏red内部磷负荷沉积物-水界面巢湖;

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