Coconut Shell Activated Carbon/CoFe2O4

摘要

Composite for the Removal of Rhodamine B from Aqueous Solution Coconut shell activated carbon loaded with cobalt ferrite(CoFe2O4)composites(CAC/CoFe2O4)was synthesized via the single-step refluxing router mefhod to manufacture adsorbents.The adsorbents were then applied to remove Rhodamine B(RhB)from aqueous environments via adsorption.The properties of coconut shell activated carbon(CAC)and CAC/CoFe2O4 were investigated through the usage of electron microscopic methods(SEM: Scanning Electron Microscopy,EDS: Energy Dispersive X-ray),powder X-ray diffraction(XRD),and Fourier transform infrared spectroscopy(FTIR).A series of batch experiments were implemented to evaluate the influences of various experimental parameters(initial pH,RhB concentration,contact time,and dosage of CAC/CoFe2O4)on the adsorption process.It was found that CoFe2O4 was successfully attached to activated carbon particles and had the suitable adsorption capacity for RhB at a molar ratio of 1:2:200 corresponding to the Co: Fe:CAC order.The removal efficiency and adsorption of RhB were optimal at a pH level of 4.The maximum adsorption capacity was 94.08 mg/g at an initial concentration of 350 mg/L and adsorbent dosage of 0.05g/25mL.Freundlich and Langmuir's models fitted well with the results obtained from the experimental data.The pseudo-second-order model also suited the most for RhB adsorption with the most remarkable correlation coefficient(R~2 = 0.934).The adsorption process was controlled by a chemisorption mechanism through electrostatic attraction,hydrogen bonding interactions,and π-π interactions.