Relationship of Metal Contaminants with Acid-Volatile Sulphides (AVS) in Tropical Estuarine Sediments: Potential Influence on Metal Distribution and Bioavailability

摘要: The river transport of anthropogenic trace metals to coastal areas and the extent which these elements are trapped within systems issues great interest (Salomons Forstner 1984). Many studies have investigated input transported by estuarine waters ability sediments scavenge retain them (e.g. Bricker 1993; Lacerda et al.1993; Puig al.1999; Rozan Benoit 1999). Besides evident influence fluctuating metal loading hydrodynamic conditions, it has been widely demonstrated that biogeochemistry in water column underlying is critical determining efficiency removal from sediments. For example, changes sediment chemistry can occur conjunction with overlying redox conditions may lead remobilisation accumulated (Cooper Morse 1996). However, remobilised again be removed after being released (Warnken al. 2001). As presence geochemically reactive phases at elevated levels under a wide range sedimentary due variable differentiated organic matter supply disturbances), research on factors regulating diagenetic behaviour essential understanding pathways accumulation transfer elements, their potential bioavailability each particular environmental condition.