Аннотация:Economically cheap adsorbents have been investigated for nitrite removal from aqueous solution through batch adsorption studies. The adsorbents prepared from different parts of the plant, Azadirachta indica, are used in study. Effect of various physicochemical parameters, namely pH, adsorbent dose, contact time, initial concentration of the nitrite ion and effect of interfering ions present in water are studied. The experimental data is analyzed using Freundlich and Langmuir isotherms to determine the mechanism of adsorption process. It is found that the Langmuir model fitted well. The kinetics of adsorption process is studied using pseudo first-order and pseudo second-order models. It is observed that the kinetics of the process followed the pseudo second-order model. The methodology developed is successfully used to real groundwater samples polluted with nitrite ions.
