The Table 2 reveals that Freundlich isotherm constants values are higher than the values of MCER, natural laterite, Fe modified clinoptilolite, RFe modified chabazite and clinoptilolite at all the stated conditions. This shows that coconut
fiber adsorbent perform better than these adsorbents. The Freundlich isotherm constant ‘n’ and Langmuir isotherm constant ‘b’ for coaly activated carbon are very high as compared to other stated adsorbents including coconut fiber adsorbent showing better bonding between adsorbate and adsorbent.