Vertical Distribution of Total Mercury and Methylmercury in Sediment of the Fugong Mangrove Area at Jiulong River Estuary, Fujian, China

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Abstract:

The concentrations and vertical distributions of total mercury (Hg) and methylmercury (methyl Hg) in the sediment of the Fugong mangrove area, located at the Jiulong River Estuary, Fujian, China, were investigated. The concentrations of total mercury were between 0.12∼0.17 and 0.11∼0.14 μg/g, while concentrations of methylmercury were between 0.15∼1.8 and 0.081∼0.58 ng/g (as mercury), in the dry and rainy seasons, respectively. The total mercury concentration was not correlated with the sampling depth. As the depth increased, methylmercury concentrations first increased to their maximum level at a depth of 10∼25 cm, and then decreased; this was similar to the vertical distribution characteristics of methylmercury/ total mercury ratios. The mangrove ecosystem was considered as a source of methylmercury for adjacent areas, due to the higher average methylmercury concentration in the mangrove sediment than other sediments nearby. Statistically significant logarithmic correlations, conic correlations, and negative correlations were observed for methylmercury and sulfide concentration, sediment organic matter, and sediment pH, respectively.

Keywords: mangrove ecosystem; methylmercury; sediment; total mercury; vertical distribution

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/106143012X13560205144731

Publication date: June 1, 2013

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  • Water Environment Research® (WER®) publishes peer-reviewed research papers, research notes, state-of-the-art and critical reviews on original, fundamental and applied research in all scientific and technical areas related to water quality, pollution control, and management. An annual Literature Review provides a review of published books and articles on water quality topics from the previous year.

    Published as: Sewage Works Journal, 1928 - 1949; Sewage and Industrial Wastes, 1950 - 1959; Journal Water Pollution Control Federation, 1959 - Oct 1989; Research Journal Water Pollution Control Federation, Nov 1989 - 1991; Water Environment Research, 1992 - present.
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