Adsorption of Nitrite Ions from Wastewater Using Bio-sorbents Derived from Azadirachta indica Plant

Article type: Research Article

Authors: Suneetha, M.^a | Ravindhranath, K.^{b; *}

Affiliations: [a] Department of Chemistry, Acharya Nagarjuna University, Guntur - 522510, India | [b] Dept of Chemistry, K.L. University, Vaddeswaram - 522502, Dt. Guntur, India

Correspondence: [*] Corresponding Author. [email protected]

Abstract: 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.

Keywords: Nitrite removal, batch adsorption, Azadirachta indica, application

DOI: 10.3233/AJW-170017

Journal: Asian Journal of Water, Environment and Pollution, vol. 14, no. 2, pp. 71-79, 2017