Uranyum serisi elementler ve diger bazı ağır metallerin sulu ortamlardan polimerik adsorbanlarla soğurumunun incelenmesi

Abstract

In this study; adsorption of uranium and thorium series elements CU, Ac, Pb,Bi and Tl) from the solution of a radioactive rock sample provided from fluorite areaat the north-west of Kuluncak-Malatya-TURKEY and also adsorption of uraniurnand lead from the aqueous media by a new polymeric adsorbent was investigated.The adsorbent is prepared by amidoximation (lPNa) of Interpenetrating PolyrnerNetworks (IPNs) synthesized by garnma irradiation of polyethylene glycolacrylonitrilesolution.The effects of adsorbent mass, particle shape and size, pH and solutionconcentration to the adsorption of these elements were determined by UV -visiblespectrofotometric and garnma spectrometric methods.The optimum particle size were determined 0.6-1.0 mm for all experiments.The optimum mass of the adsorbent were determined as 25 mg for the rock and leadsolution and 10 mg for the uranyl solution. The optimum concentrations and pH value s were determined for the rock, lead and uranyl solutions as 1.0-200 fgIL, 2.5-3; 14 mg Pb2+ IL, 4-5 and 10 g UO;+ IL, 3 respectively.The maximum adsorption value s of each elements obtained from theadsorption isotherms (L, or H type according to Giles) were found as 75%, 43%,95%, 38% for Ac, Pb, Bi and Tl for the adsorption from the radioactive rocksolution; ~804 mg U/g IPNa for uranium from aqueous uranyl nitrate solution; ~450mg U/g IPNa for uranium from uranium added radioactive rock solution; ~ 7 mg Pb/gIPNa for Icad from aqueous lead nitrat e solution. The adsorption sequence of theelements was found as Ac>Pb>Bi>TI from the radioactive rock solution.lt was concluded that the polymeric adsorbent could be effectively used forU, Ac, Pb, Bi and Tl adsorption from radioactive rock solution and also for theuranium and lead adsorption from aqueous salt solutions.