热带海洋学报 ›› 2015, Vol. 34 ›› Issue (4): 83-89.doi: 10.11978/j.issn.1009-5470.2015.04.012CSTR: 32234.14.j.issn.1009-5470.2015.04.012

• 环境海洋学 • 上一篇    下一篇

珠江口磨刀门水域溶解态Cd、Pb分布的潮流变化特征*

石荣贵1, 2, 龙爱民2, 吴玲玲1, 兰圣迎1   

  1. 1. 国家海洋局南海环境监测中心, 广东 广州 510300;
    2. 热带海洋环境国家重点实验室(中国科学院南海海洋研究所), 广东 广州 510301;
  • 收稿日期:2014-08-27 出版日期:2015-08-10 发布日期:2015-08-21
  • 通讯作者: 吴玲玲。E-mail: wulingling1998@163.com
  • 作者简介:石荣贵(1984~), 男, 福建省龙岩市人, 助理工程师, 硕士, 主要从事海洋化学测试与分析工作。E-mail: rgshi2010@126.com
  • 基金资助:

    全球变化研究国家重大科学研究计划(2010CB951201); 国家自然科学基金广东省联合基金(U0933005)

Tidal variation in the distributions of dissolved Cd and Pb in the Modaomen Channel of the Pearl River Estuary

SHI Rong-gui1, 2, LONG Ai-min2, WU Ling-ling1, LAN Sheng-ying1   

  1. 1. South China Sea Environment Monitoring Center, State Oceanic Administration, Guangzhou 510300, China;
    2. State Key Laboratory of Tropical Oceanography (South China Sea Institute of Oceanology, Chinese Academy of Sciences), Guangzhou 510301, China;
  • Received:2014-08-27 Online:2015-08-10 Published:2015-08-21
  • Supported by:

    ; *感谢中国科学院南海海洋研究所王军、张镇秋和李先鹏在现场采样过程中给予的大力协助。

摘要:

潮流引起的水动力变化, 对河口水体中重金属的迁移转化行为具有重要的作用。于2011年9月进行了两个航次的断面与定点连续调查, 研究了潮流变化特别是咸潮入侵对磨刀门Cd、Pb分布的影响。结果表明, 小潮期间从河端到海端溶解态Cd浓度显著升高, 水柱Cd浓度发生分层现象, 大潮期间Cd的分布形式主要受海水稀释作用的影响; 磨刀门溶解态Pb大潮、小潮的断面分布特征较为复杂, 与Cd分布特征存在较大差异。小潮定点连续调查期间, Cd分层明显, Pb的分层则不显著; 大潮定点连续调查期间, 受到强咸潮的作用, Cd、Pb分布主要受物理稀释作用的影响。

关键词: Cd, Pb, 潮流, 磨刀门

Abstract:

Tides can cause changes in hydrodynamics and have great influence on the fate of heavy metals in estuary. The distributions of dissolved Cd and Pb in the Modaomen Channel were investigated in September 2011. During neap tide, Cd concentration increased from river end member to sea end member; Cd stratification was also found. The fate of Cd was subjected to dilution by sea water of low Cd concentration during spring tide. There were large differences of sectional distribution characteristics between Cd and Pb. The sectional distribution of Pb was complicated. During the neap tide anchor survey, Cd stratification was obvious. During the spring tide anchor survey when strong salt-water intrusion occurred, the fates of Cd and Pb were mainly decided by physical dilution of sea water.

Key words: Cd, Pb, tide, Modaomen Channel