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生态学杂志 ›› 2011, Vol. 30 ›› Issue (05): 1004-1007.

• 汞的生物地球化学专辑 • 上一篇    下一篇

泉州湾红树林湿地沉积物中汞分布及形态特征

于瑞莲1,2**,胡恭任1,刘越1,杨翼1   

  1. 1华侨大学环境科学与工程系, 福建厦门 361021|2中国科学院城市环境与健康重点实验室, 福建厦门 361021
  • 出版日期:2011-05-08 发布日期:2011-05-08

Mercury distribution and speciation in the sediments of mangrove wetland in Quanzhou Bay.

YU Rui-lian1,2**, HU Gong-ren1, LIU Yue1, YANG Yi1   

  1. 1Department of Environmental Science and Engineering, Huaqiao University, Xiamen 361021, Fujian, China|2Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, Fujian, China
  • Online:2011-05-08 Published:2011-05-08

摘要: 采集了泉州湾红树林湿地表层沉积物样品,测定了沉积物中不同形态汞的含量,研究了汞的分布特征、赋存形态及其生物有效性。泉州湾红树林湿地表层沉积物中总汞含量范围0.03~0.22 mg·kg-1,除14#采样点外,其余各采样点均符合海洋沉积物质量(GB 18668-2002)Ⅰ类标准;沉积物中不同形态汞占总汞的比例为可氧化态(84.0%)>残渣态(14.0%)>可还原态(1.8%)>弱酸溶态(0.2%);沉积物中汞的生物有效性较高,对红树林生态系统存在一定的潜在危害。

关键词: 香根草, 富营养化, 水体净化

Abstract: Surface sediments were sampled from the mangrove wetland in Quanzhou Bay to study the distribution, speciation, and bio-availability of mercury in the sediments. The total mercury content in the sediments ranged in 0.03-0.22 mg·kg-1, which met the first class standard of Marine Sediment Quality (GB 18668-2002), with the exception of that at site 14. The average proportion of different speciation mercury to total mercury in the sediments presented a sequence of oxidizable (84.0%) > residual (14.0%) > reducible (1.8%) > weak acid soluble (0.2%). The relatively high bio-availability of mercury in the sediments indicated certain potential hazard to the mangrove ecosystem.

Key words: Vetiveria zizanioids, Eutrophication, Purification of water body