Mercury and Sulfur Redox Cycling Affect Methylmercury Levels in Rice Paddy Soils across a Contamination Gradient.

ABSTRACT: Methylmercury (MeHg) contamination in rice via paddy soils is an emerging global environmental issue. An understanding of mercury (Hg) transformation processes in paddy soils is urgently needed in order to control Hg contamination of human food and related health impacts. Sulfur (S)-regulated Hg transformation is one important process that controls Hg cycling in agricultural fields. In this study, Hg transformation processes, such as methylation, demethylation, oxidation, and reduction, and their responses to S input (sulfate and thiosulfate) in paddy soils with a Hg contamination gradient were elucidated simultaneously using a multi-compound-specific isotope labeling technique (²⁰⁰Hg^II, Me¹⁹⁸Hg, and ²⁰²Hg⁰). In addition to Hg^II</

SUBMITTER: Liu J 

PROVIDER: S-EPMC10234277 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature