Work

Adsorption kinetics and isotherms for the removal of rhodamine B dye and Pb+2 ions from aqueous solutions by a hybrid ion-exchanger

Year: 2016

Type: article

Abstract: The capacity of synthesized hybrid ion exchanger was found for removal of rhodamine B dye and Pb+2 ions from aqueous solution. The effect of different reaction conditions such as sample dosage, pH, ionic strength, contact time and concentration on removal of rhodamine B dye and lead ions was studied. Experimental results of pH and ionic strength showed that hydrophobic-hydrophobic interactions might be the dominant force of attraction for the rhodamine B and lead ions onto synthesized hybrid exchanger system. Adsorption equilibrium isotherms were analyzed by Langmuir, Freundlich, Dubinin-Radushkevich, Tempkin and Redlich-Peterson and Sips models. Langmuir model was found to show the best fit for experimental data and the maximum adsorption capacity was found to be 82.3 and 182.7 mg g−1 for lead ions and 76.4 and 156.8 mg g−1 for rhodamine B at 20 and 50 °C, respectively. The experimental kinetic of the data was analyzed using pseudo-first-order, pseudo-second-order and Weber-Morris intra-particle kinetic models and the results showed that pseudo-second-order kinetic model described the ion exchange kinetics accurately for rhodamine B and lead ions. Thermodynamic activation parameters such as ΔG∗, ΔS∗ and ΔH∗ were also calculated.

Source: Arabian Journal of Chemistry

DOI: 10.1016/j.arabjc.2016.11.009

Authors: Saruchi, Vaneet Kumar

Institutions: DAV University, CT Group Of Institutions

Language: English

Topic: Adsorption and biosorption for pollutant removal

Subfield: Water Science and Technology

Field: Environmental Science

Domain: Physical Sciences

SDG: Clean water and sanitation

Open Access status: hybrid

Estimated APC paid: $1,490