in theory which was consistent with the maximum adsorbing capacity
measured by experiment (305 mg/g).
3.4. Adsorption isotherms
Adsorption isotherms are of importance in the design of adsorption
systems because they can reflect the surface characteristics of the adsorbent
in micro level as well as the adsorption characteristics of adsorption
capacity, adsorption strength and absorption state. Adsorption
equilibrium data have been fitted by Henry, Langmuir and Freundlich
at 25 °C, 35 °C and 45 °C. Among these, linear fitting results at 25 °C
were shown in Fig. 4 and Table 2. The Henry, Langmuir and Freundlich
equation have the forms listed below