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生态学杂志 ›› 2011, Vol. 30 ›› Issue (05): 976-980.

• 汞的生物地球化学专辑 • 上一篇    下一篇

阿哈水库沉积物总汞及甲基汞分布特征

白薇扬1,2,冯新斌2**,何天容3,仇广乐2,闫海鱼2   

  1. 1重庆理工大学化学与化工学院, 重庆 400050;2中国科学院地球化学研究所环境地球化学国家重点实验室, 贵阳 550002;3贵州大学蔡家关校区喀斯特重点实验室, 贵阳 550003
  • 出版日期:2011-05-08 发布日期:2011-05-08

Distribution patterns of total mercury and methyl mercury in Aha Reservoir sediment.

BAI Wei-yang1,2, FENG Xin-bin2**, HE Tian-rong3, QIU Guang-le2, YAN Hai-yu2   

  1. 1School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400050, China|2State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China|3Key Laboratory of Karst Environment and Geohazard Prevention, Guizhou University, Guiyang 550003, China
  • Online:2011-05-08 Published:2011-05-08

摘要: 为弄清阿哈水库沉积物是否受到历史矿山废水输入对沉积物总汞及甲基汞垂直分布的影响,对沉积物总汞及甲基汞的含量和其垂直分布特征进行了研究。结果表明,阿哈水库沉积物总汞含量变化范围为160~252 ng·g-1,平均为210 ng·g-1,明显高于其他未受到污染的水库沉积物。沉积物中总汞含量随沉积物深度增加呈增加趋势,与其沉积环境有关。沉积物中甲基汞含量变化范围为0.2~7.2 ng·g-1,平均为1.8 ng·g-1,丰水期甲基汞含量随深度增加逐渐下降,且沉积物表层甲基汞含量显著高于枯水期,与丰水期表层有机物的增加和厌氧环境有关。

关键词: 水稻, CO2浓度增加, 物质生产与分配, 可溶性碳水化合物, 叶面积系数, 净同化率

Abstract: In order to make clear whether the sediment in Aha Reservoir was contaminated by the mercury (Hg) from mining wastewater drainage, an investigation was conducted on the vertical distribution patterns of total Hg (THg) and methyl Hg (MeHg) in the sediment. The THg concentration in the sediment ranged from 160 to 252 ng·g-1, with an average of 210 ng·g-1, being obviously higher than that in uncontaminated lakes. The THg concentration increased with sediment depth, which was related to the sediment environment. The MeHg concentration varied from 0.2 to 7.2 ng·g-1, with an average of 1.8 ng·g-1. In the period with abundant water, the MeHg concentration decreased with sediment depth, and that in sedment surface layer was obviously higher, as compared in low water period, which was related to the increased organic matter content and anaerobic enviroment in sedment surface layer in abundant water period.

Key words: Rice, Free air CO2 enrichment, Biomass accumulation and partition, Soluble carbohydrates, Leaf area index, Net assimilation rate