| metal speciation in sediment and their bioaccumulation in fish species of three urban rivers in bangladesh. | six trace metals (chromium [cr], nickel [ni], copper [cu], arsenic [as], cadmium [cd] and lead [pb]) were measured in sediments and soft tissues of three commonly consumed fish species (channa punctatus, heteropneustes fossilis, and trichogaster fasciata) collected from three urban rivers around dhaka city, bangladesh. the abundance of total metals in sediments varied in the decreasing order of cr > ni > pb > cu > as > cd. sequential extraction tests showed that the studied metals were predomina ... | 2015 | 25213477 |