Adsorption Behavior of Methylene Blue on Ethylenediaminetetraacetic Dianhydride Modified Neem (Azadirachta indica) leaf powder

摘要

Neem {Azadirachta indica) leaf powder was modified using a chelating agent, ethylenediaminetetaraacetic dianhydride (EDTAD) and the adsorption performance in removing methylene blue (MB) was investigated under batch mode. The EDTAD modified neem leaf powder (ENLP) was characterized by spectroscopic technique and elemental analysis. Fourier transform infrared (FTIR) spectra indicated that the ROH, RCOOR, RCOO~- and RNH_2 groups were involved in the removal of MB. The maximum adsorption capacity calculated from the Langmuir isotherm model was 178.57 mg/g at 318 K. Adsorption kinetic was found to be fitted well with the pseudo-first-order model. This study suggests that ENLP can be an attractive adsorbent for MB removal from diluted industrial wastewater.