A comparative study of tin profiles with other metals and phosphorus patterns in lacustrine sediments: Mobility and pollution

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Abstract
Tin profiles in three sediment cores of lake Geneva were compared with patterns of mobile elements and of metals related to anthropogenic flux in order to estimate tin mobility, fluxes and fate in lacustrine sediments. It appears that the mobility of tin is rather low in the studied anoxic lacustrine sediments. The average tin anthropogenic flux at site M 1, adjacent to Vidy sewage plant discharge outlet, is at least 2.6 μg cm‐2 y‐1 . However, the average tin flux at site L 14 (255 m depth) and site L 16 (305 m depth) are 0.23 and 0.12 μg cm‐2 y‐1 respectively. Therefore, the main anthropogenic source of tin is sewage and the major sink of tin in the near‐shore polluted areas is participate deposit, which immobilises tin in the sediment column.