Fluvial transport and risk of mercury in a gold mining area

摘要: My thesis is part of an overall environmental program evaluating the and human health stress in areas Nicaragua affected by anthropogenic emission metals man-made organic substances. I examine fluvial transport mercury contextually associated with extent contamination observed a gold mining area. Field measurements (Papers I, II, IV, V), experimental assays (Paper III), risk assessment VI) are used investigation on basin scale. Even though same processes mechanisms apply for accumulation movement river ground water systems, local hydrogeological climatic conditions together dynamic activity make site specific. Therefore, consider that efforts to elucidate fate dependence settings its implication humans compulsory assessing impact poorly-controlled use areas. Hence, take actions protection. At scale, flowing thought export dissipate pollution. rivers streams mercury-enriched waste disposal. Notwithstanding, levels concern sediments. Since sediments threat organisms exposes riverine populations through consumption mercury-contaminated fish, sediment phase has been particular importance from perspective health. it great involved partitioning river, interaction groundwater system such sensitive watersheds low, evaluation also needed, because bio-concentrates bioaccumulates exposed receptors. The results my studies may help promote control contribute development quality criteria can be regulatory purposes developing country. insights gained investigations carried out Sucio call care monitoring. Together other findings reported studies, core useful information implement alternatives abatement basin. (Less)