Mercury speciation including total Hg and methylmercury (MeHg) was measured in environmental matrices (soil, water, sediment) from artisanal small-scale gold mining (ASGM) areas in Kenya. The study characterises Hg cycling and MeHg formation in ASGM environments, which are a major source of Hg emissions globally. Not a food occurrence paper, but provides supply-chain context for Hg contamination of local food systems near ASGM sites.
Key numbers
- Total Hg and MeHg concentrations in soil, water, and/or sediment from ASGM sites in Kenya in full paper.
- MeHg formation rates and speciation fractions in full paper.
Methods (brief)
Hg speciation analysis distinguishing total Hg and MeHg. Method confirmed speciation-capable. Environmental matrices (not food). Kenya, Sub-Saharan Africa ASGM context.
Implications
Certification: ASGM areas contribute to local food-chain Hg contamination through soil and water contamination pathways. Relevant to supply-chain sourcing from affected regions. Courses: Illustrates MeHg formation pathways in mining-affected environments; relevant to understanding Hg bioaccumulation in local food systems. Microbiome: Mercury in soil affects microbial communities involved in MeHg methylation/demethylation cycles.