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p-Phenylenediamine functionalized magnetic graphene oxide nanocomposites   (PPD-MGO) were prepared and utilized in the adsorption and removal of   bisphenol A in aqueous solution. The novel nanomaterials were characterized   by transmission electron microscopy (TEM), Fourier infrared spectrometry   (FT-IR) and vibrating sample magnetometer (VSM). The factors affected the   adsorption of bisphenol A including adsorption time, temperature and pH of   solution, adsorption kinetics and isotherms were all investigated. The   results showed that PPD-MGO nanomaterial exhibited good adsorption ability   for bisphenol A and good resuability. The maximum adsorption capacity reached   155.0 mg g-1 at 45°C and pH 7. The removal rate was 99.2 % after three times   of adsorption with new nanomaterials. After five cycles adsorption, the   adsorption capacity of PPD-MGO remained at 94.0 %. The adsorption of   bisphenol A was found that fitted pseudo second order kinetics equations and   the Freundlich adsorption model. The experimental results showed the PPD-MGO   nanomaterial had a good adsorption ability to remove organic compounds in   aqueous solution

Adsorption and removal of bisphenol A from aqueous solution by p-phenylenediamine modified magnetic graphene oxide