RIASSUNTO
the aim of the present study is to determine the level of different heavy metals (Pb, Cd, Ni, Cu, Fe, Zn) and metalloid (As) in 3 components (water, sediment and fish) of a single pond production system. Samples of water, sediments and fish (Silurus glanis, Cyprinus carpio and Carrassius gibelio) were collected in april 2016 from a aquaculture pond (Mălina Pond) situated in the South-East part of Romania. The results point out the following accumulation descending trend in: water – Fe $(299 {mu} gL^{-1})gt$ Zn > Ni > As > Pb > Cu > Cd $(0.014 {mu} gL^{-1}$), sediments – Ni $(36.153 {mu} gg ^{-1}gt)$ Cu > Fe > As > Pb > Cd > Zn ($(0.128 mu g).g^{1}$) and fish muscle tissue – Fe $(14.83 pm 1.48 {mu} gg^{-1}$ in catfish, $19.64 pm 4.79 {mu} gg^-1$, in carp, $18.02 pm 0.56 {mu} gg^{-1}$ in prussian carp > Zn > Cu > Pb > Cd > As (LOD = below the detection limit). The estimated daily intake (EDI) was calculated for each analysed metal as it follows: EDICd = 0.003 for catfish, 0.004 for carp, 0.001 for prussian carp, $E_{Pb} = 0.006$ for catfish, 0.007 for carp, 0.004 for prussian carp, $EDI_{Cu}= 0.749$ for catfish, 0.663 for carp, 0.093 for prussian carp, $EDI_{Zn} = 1.828$ for catfish, 3.5 for carp, 5.33 for prussian carp. The EDI values were below the maximum tolerable values recommended by the WHO (World Health Organization) and FAO (Food and Agriculture Organization of the United Nations). The main conclusion of this research is that the fish produced in Mălina Pond is safe for human consumption, from the heavy metals content point of view. Also, the present paper can help identify specific heavy metals accumulation trends in the water environment in future research.