Preparation of hydrogel microsphere and its adsorption properties for bisphenol A
Hydrogel microspheres were synthesized via reverse emulsion/UV light polymerization and em-ployed as adsorbents for removing BPA from aqueous solution.Results demonstrated that the adsorption capacity was pH-independent below pH 8.0,and decreased when pH values greater than 8.0.The adsorp-tion process achieved an equilibrium state within 12 min,and the maximum adsorption capacity of the hy-drogel for BPA was4.71 mg/g.The adsorption process was fitted well with the pseudo-second order kinet-ic and the Freundlich linear isotherm model.Thermodynamic parameters reflected that BPA adsorbed by hydrogel was a spontaneous and exothermic progress.The hydrogel can be used for five cycles maintaining 100%of adsorption capacity.Excellent results were also achieved by applying hydrogel for spiked real surface waters,which accounted for more than 91%compared to simulated solution.
hydrogel microspherebisphenol Aadsorption isothermUV polymerizationwaste water treatment
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