@article{aees2018631,
author={Ahmad, Muhammad Muneeb},
title={Equilibrium and Kinetics Study for Adsorption of 2,4-Dinitrophenol from Aqueous Solutions by Using <i>Cucumis Sativus</i> Peels and Kidney Bean Shells as New Low-cost Adsorbents},
journal={Applied Ecology and Environmental Sciences},
volume={6},
number={3},
pages={70--78},
year={2018},
url={http://pubs.sciepub.com/aees/6/3/1},
issn={2328-3920},
abstract={Main goal of this study was to investigate the adsorptive potential of 2,4-Dinitrophenol (2,4-DNP) from aqueous solutions onto <i>Cucumis Sativus</i> peels (CSPs) and kidney bean shells (KBS). These adsorbents were used first time to adsorb 2,4-DNP from aqueous solutions. Both the adsorbents were pretreated with 37% HCl to enhance the 2,4-DNP uptake ability. Adsorption parameters such as influence of pH, adsorbent dose, contact time and initial concentration of 2,4-DNP were determined. Maximum % adsorption of 2,4-DNP take place, at pH of 4.0, initial concentration of 40 mg/L, contact time of 120 min and adsorbent dose of 100 mg which was 93.13% for <i>Cucumis sativus</i> peels and 99.02% for kidney bean shells. Kidney bean shells was found to be more efficient in adsorption of 2,4-DNP from aqueous solutions as compared to <i>Cucumis sativus </i>peels. Kinetic study indicated that the adsorption of 2,4-DNP was best followed by pseudo second order kinetic model. Results show that the rate of adsorption was better controlled by intra-particle diffusion as well as film diffusion. It was accomplished that the adsorption of 2,4-DNP onto <i>Cucumis sativus</i> peels and kidney bean shells was best defined by Langmuir adsorption model and maximum adsorption capacities of both the adsorbents were obtained by Langmuir equation which were 47.61 mg/g for <i>Cucumis sativus</i> peels and 52.63 mg/g for kidney bean shells. It is concluded that agricultural waste such as <i>Cucumis sativus</i> peels and kidney bean shells can be used as low-cost adsorbents for adsorption of 2,4-DNP from aqueous solution at large scale in replacement of high cost adsorbents.},
doi={10.12691/aees-6-3-1}
publisher={Science and Education Publishing}
}