Z.S Saljoghi - Department of Fisheries and Environmental Sciences, Faculty of Natural Resources, University of Tehran, Iran
G Rafiee - Department of Fisheries and Environmental Sciences, Faculty of Natural Resources, University of Tehran, Iran
A Malekpour - Faculty of Sciences, University of Isfahan, Isfahan, Iran
M Bakhtyari - Department of Fisheries and Environmental Sciences, Faculty of Natural Resources, University of Tehran, Iran

Water treatment is one of the main challenging sectors in recirculation aquaculture systems. Recently, cost effective and highly efficient water remediation techniques have been widely acknowledged. New ion exchangers (AmberliteRIA410 and puroliteA200) are of the great interest due to their ability to remove trace concentrations of anionic species, which are frequent in aquaculture effluent. These systems are still in their infancy and there is not enough information in this regard. Ion absorption capacity of the ion exchanger resins were studied for nitrite, nitrate, phosphate and sulfate at different effluent temperatures (10, 15 and 20 C) and pHs (6, 65, 7, 75, 8). Resins were modifiedby NaOH, before their application. Results indicated that higher ion absorption coincided with higher effluent temperature (p<0.05). PuroliteA200 showed well arranged trend in this regard compared with AmberliteRIA410. Different pH had versatile effect on ion absorption capacity and didn't follow a regular trajectory.Resins showed better ion absorption for nitrate and sulfate.

Amberlite RIA410, Purollitea200, Anion Absorption, Recirculating Aquaculture System, Toxic Anions