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The comparison of supernatants’ Pb2+concentration in SiO2and SiO2-PEGMA solutions. The initial concentration of Pb2+ is 100 mg/l; the volume of Pb2+ is 10 ml; the weight of nanoparticles is 50 mg; the adsorption times are 0.5, 1, 2, and 3 h; and the temperature is 25°C.
