The accumulation standard refers to the actual allowable concentration of a specific chemical substance in the sediment that does not cause harm to the benthic organisms or the quality of the overlying water body.It is not only the improvement of water quality benchmarks, but also the basis for evaluating sediment pollution and ecological risks, and a basic element of lake ecological environmental quality evaluation. Foreign research on sediment benchmarks began in the 1980s, but has not yet formed a complete and comprehensive a unified sediment benchmark system. Due to the complexity of the migration, transformation, bioaccumulation and interface processes of pollutants in sediments, there is still a lack of key research methods. Many domestic scientists have done a lot of useful exploration, but research is still relatively fragmented, and no national authorities have issued benchmark standards for lake sediments.
meant to illustrate?
There is an urgent need to make up for the lack of the existing sediment benchmark system.