BIOACCUMULATION OF CHROMIUM AND NICKEL APPLIED TO SINGLE AND BINARY FOR A SHORT TIME IN Ceratophyllum demersum, A ROOTLESS AQUATIC MACROPHYTE

Abstract

This study was undertaken to investigate bioconcentrations of Cr and Ni in single and binary tratments by C. demersum. The macrophyte was treated with 0.1, 1 and 10 mg L^-1 Cr and Ni concentrations their combinations (0+0, 0.1+0.1, 1+1 and 10+10 mg L^-1 Cr plus Ni). Chromium and nickel accumulation capacities of the macrophyte were found to be different. Compared to Ni, more Cr was accumulated in the macrophyte tissues. Binary applications of Cr and Ni have generally reduced metal uptake compared to single applications. There was a decrease in bioconcentration factors with increased external the metal concentrations. It was concluded that the macrophyte can bioaccumulate in its tissues by uptake more metal from the environment at low concentrations.