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嘉兴市北部湖荡区沉积物磷释放通量估算及影响因素研究

马迎群 迟明慧 温泉 曹伟 秦延文 刘志超 杨晨晨

马迎群, 迟明慧, 温泉, 曹伟, 秦延文, 刘志超, 杨晨晨. 嘉兴市北部湖荡区沉积物磷释放通量估算及影响因素研究[J]. 环境工程技术学报, 2020, 10(2): 212-219. doi: 10.12153/j.issn.1674-991X.20190090
引用本文: 马迎群, 迟明慧, 温泉, 曹伟, 秦延文, 刘志超, 杨晨晨. 嘉兴市北部湖荡区沉积物磷释放通量估算及影响因素研究[J]. 环境工程技术学报, 2020, 10(2): 212-219. doi: 10.12153/j.issn.1674-991X.20190090
MA Yingqun, CHI Minghui, WEN Quan, CAO Wei, QIN Yanwen, LIU Zhichao, YANG Chenchen. Fluxes and influencing factors of phosphorus release in sediments in northern lacustrine areas of Jiaxing City[J]. Journal of Environmental Engineering Technology, 2020, 10(2): 212-219. doi: 10.12153/j.issn.1674-991X.20190090
Citation: MA Yingqun, CHI Minghui, WEN Quan, CAO Wei, QIN Yanwen, LIU Zhichao, YANG Chenchen. Fluxes and influencing factors of phosphorus release in sediments in northern lacustrine areas of Jiaxing City[J]. Journal of Environmental Engineering Technology, 2020, 10(2): 212-219. doi: 10.12153/j.issn.1674-991X.20190090

嘉兴市北部湖荡区沉积物磷释放通量估算及影响因素研究

doi: 10.12153/j.issn.1674-991X.20190090
详细信息
    作者简介:

    马迎群(1982—),男,副研究员,主要从事水污染化学研究,mayq@craes.org.cn

    通讯作者:

    秦延文 E-mail: qinyw@craes.org.cn

  • 中图分类号: X524

Fluxes and influencing factors of phosphorus release in sediments in northern lacustrine areas of Jiaxing City

More Information
    Corresponding author: Yanwen QIN E-mail: qinyw@craes.org.cn
  • 摘要: 为了解沉积物磷释放对水体磷污染的影响,以嘉兴市北部湖荡区为研究对象,结合薄膜扩散梯度技术(DGT)对湖荡区(汾湖、莲泗荡、北官荡)沉积物磷释放通量进行研究,分析磷释放影响因素,并对沉积物磷释放对上覆水体的影响进行了评估。结果表明:汾湖、莲泗荡和北官荡采样点沉积物-上覆水界面DGT-P(溶解性有效态磷)浓度总体表现为莲泗荡(0.735 mg∕L)>北官荡(0.154 mg∕L)>汾湖(0.077 mg∕L)。垂向分布上,3个湖荡采样点表层沉积物中DGT-P浓度均高于上覆水,但在沉积物-上覆水界面±10 mm范围内表现各不相同,其中汾湖采样点沉积物-上覆水界面DGT-P没有明显的浓度梯度,说明沉积物向上覆水释放磷能力较弱,而莲泗荡采样点呈现明显的浓度梯度,沉积物有较强的释放磷能力,北官荡采样点介于二者之间。各湖荡采样点沉积物-上覆水界面磷释放通量对上覆水体的影响有限,其中莲泗荡采样点磷释放通量最高,为0.490 mg∕(m 2·d),对上覆水体的贡献率也最大(1.93%),表现为磷“源”;其次为北官荡采样点,其磷释放通量为0.047 mg∕(m 2·d),对上覆水体的贡献率为0.24%;汾湖采样点磷释放通量接近0,表现为磷“汇”。相关性分析结果表明,铁氧化物还原溶解对沉积物-上覆水界面磷的迁移转化过程具有重要影响,同时有机质矿化过程对沉积物磷释放的影响也不容忽视。

     

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  • 收稿日期:  2019-05-23
  • 刊出日期:  2020-03-20

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