Chapter 4 Biogeochemical cycles and remobilisation of the actinide elements

摘要: Publisher Summary This chapter reviews the inputs of key actinide elements to natural environment examine global cycling U in context iron cycle and review possible roles microbial processes remobilization behavior actinides. The mobility systems is controlled by their partitioning between aqueous particulate phases, which turn affected speciation. Actinide that occur predominantly phase may be rapidly widely dispersed via riverine discharge ocean currents remain bioavailable indefinitely. By contrast, associated with particulates undergo more limited transportation, where sedimentation can near point discharge, estuarine, tidal fiat, salt marsh sediments acting as sinks. species dependent on a range competing mechanisms.