Availability and mobility of heavy metal from sediments in To Lich and Kim Nguu river system

Abstract

    The present study was to evaluate the availability and mobility of heavy metals in the sediments in the To Lich and Kim Nguu River system through metals concentration obtained and its percentage to total concentration. Total 12 sediment samples were collected at the To-Lich, Kim-Nguu Rivers. The results showed that the highest extracted concentration of sediment samples was in the order Zn > Cr > Cu > Pb > Ni > Cd by 0.5M HCl and Cr > Zn > Ni > Cu > Pb > Cd by 0.1M HNO¬3. The extracted concentration by 0.5M HCl was higher than that of 0.1M HNO¬3 for all heavy metals except for Cr.