Aquatic cycling of mercury

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Abstract

This chapter examines crucial processes in the aquatic cycling of mercury (Hg) that may lead to microbial production of neurotoxic and bioaccumulative methylmercury (MeHg), and highlights environmental conditions in the Everglades that make it ideal for MeHg production and bioaccumulation. The role of complexation of Hg2+ in surface water, especially by dissolved organic matter (DOM), in the transport of mercury to sites of microbial methylation are discussed. Photochemical reactions important in Hg cycling in surface water are also discussed. A principal focus of the chapter is on the environmental conditions that promote MeHg production, especially the role of sulfide and DOM in transport of inorganic Hg into bacteria for methylation, and the types of bacteria that have the ability to methylate Hg. Finally, perturbations to the ecosystem (e.g., fire and drought) that have important effects on Hg cycling are discussed.

Additional publication details

Publication type Book chapter
Publication Subtype Book Chapter
Title Aquatic cycling of mercury
Chapter 1
DOI 10.1007/978-3-030-32057-7_1
Year Published 2019
Language English
Publisher Springer
Contributing office(s) Eastern Energy Resources Science Center
Description 12 p.
Larger Work Type Book
Larger Work Subtype Monograph
Larger Work Title Mercury and the Everglades. A synthesis and model for complex ecosystem restoration
First page 1
Last page 12