  Environmentally-benign high-performance graphene oxide (GO)/alginate-based
absorbents were prepared to eliminate acridine orange selected as a typical
dye. Characterizations demonstrated GO well encapsulated and its promotion of
pore formation on structure. Kinetic studies exhibited that the addition of GO
shortened the adsorption equilibrium time, raised the initial rate and the
adsorption capacity. Isotherm studies indicated the adsorptive behavior
followed Langmuir type, and higher maximum capacity was obtained in the
presence of GO. The adsorption positively responded to pH increased from acidic
to weakly alkaline. At low pH, GO would contribute dominantly to the
adsorption, whereas alginate component was inhibited.
