A study on the flux, speciation, and budget of mercury in controlled experimental ecosystems

Lu Xiankun; K. W. Johnson; F. A. Whitney; C. S. Wong; Wu Jinping

doi:10.1007/BF02844999

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A study on the flux, speciation, and budget of mercury in controlled experimental ecosystems

Updated：2023-05-16

- A study on the flux, speciation, and budget of mercury in controlled experimental ecosystems
- Journal of Oceanology and Limnology Vol. 5, Issue 2, Pages: 146-160(1987)
- Affiliations：
  
  1. Shandong College of Oceanology
  2. Institute of Ocean Sciences
  3. Third Institute of Oceanography
- Author bio：
- Funds：
- DOI：10.1007/BF02844999
  CLC：
- Published：1987
- Accepted：
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Xiankun, L., Johnson, K.W., Whitney, F.A. et al. A study on the flux, speciation, and budget of mercury in controlled experimental ecosystems., Chin. J. Ocean. Limnol. 5, 146–160 (1987). https://doi.org/10.1007/BF02844999
DOI：

Xiankun, L., Johnson, K.W., Whitney, F.A. et al. A study on the flux, speciation, and budget of mercury in controlled experimental ecosystems., Chin. J. Ocean. Limnol. 5, 146–160 (1987). https://doi.org/10.1007/BF02844999 DOI：

摘要

Abstract

The lowest addition of mercury (0.1 ug Hg 1−1) was used in CEEs for research on mercury flux

speciation and budget. The removal behavior of mercury by phytoplankton in water columns of CEEs can be described by first order kinetic equations for total and particulate mercury in the CEE spiked by mercury. The removal rate of mercury in water columns depends on the size and productivity of phytoplanton in a water column to which mercuric ions were added. A 4.4 day half-life time and a 2.8 day half-life time for total and particulate mercury respectively was obtained in diatom bloom. During microflagellate bloom a 30 day total mercury half-life time was estimated with increase of particulate mercury in the water column. The 0.010 ug Hg cm−2y−1 mercury flux rate that was attained in the control bag agreed with the values from field measurements in Saanich Inlet where the bags were launched. The proportion of total mercury to dissolved and particulate mercury depended also on the size

productivity

and concentration of mercury in a water column. A more or less constant distribution of mercury species in the control bag was observed as follows: dissolved Hg 0.73

particulate Hg 0.27

inorganic Hg 0.42

dissolved organic Hg 0.31. After spiking with mercury

the particulate mercury rose rapidly and reached to over 70% of the total mercury. The concentration factor of mercury by phytoplankton in the CEEs in the order of 105 was consistent with the results from field measurements in Saanich Inlet. The mercury recovery from the water column

sediment

water with sediment

and the CEE bag walls was only 52.3% of total mercury spiked in the CEE. The losses of mercury by vaporization into the ambient air and diffusion through the wall of the enclosure should be considered.

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references

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