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As the atmospheric arsenic(As)concentration is generally high in East Asia.The current study preliminarily evaluate and project the impacts of atmospheric As deposition on human multimedia exposure in the PRD region,South China,based on a most preservative exposure scenario.The deposition samples were collected using automated wet-dry samplers continuously from Mar.to Dec.2015.Water surface was specifically used for dry deposition.The observational As deposition flux was incorporated in to the environmental media accumulation models and human exposure models established by the USEPA.