The efficacy of seashells as a new adsorbent for removal of phenol from aqueous solutions was studied by performing batch equilibrium tests under different operating parameters such as solution pH, adsorbent dose, initial phenol concentration, and temperature. The phenol removal efficiency remained unaffected when the initial pH of the phenol solution was in the range of 3–8. The amount of phenol adsorbed increased with increasing initial phenol concentration while it decreased with increasing temperature. The adsorption equilibrium data showed excellent fit to the Langmuir isotherm model with maximum monolayer adsorption capacity of 175.27 mg g−1 at pH 4.0, initial phenol concentration = 50 mg L−1, adsorbent dose = 2 g and temperature = 293 K. Analysis of kinetic data showed that the adsorption process followed pseudo-second-order kinetics. Activation energy of the adsorption process, calculated using the Arrhenius equation, was found to be 51.38 kJ mol−1, suggesting that adsorption of phenol onto seashells involved chemical ion-exchange. The numerical value of the thermodynamic parameters (ΔG0, ΔH0 and ΔS0) indicated that adsorption of phenol onto seashells was feasible, spontaneous and endothermic under the examined conditions. The study shows that seashells can be used as an economic adsorbent for removal of phenol from aqueous solution.
Article navigation
Research Article|
February 27 2013
Removal of phenol from aqueous solution by adsorption onto seashells: equilibrium, kinetic and thermodynamic studies
Papita Das Saha
;
Papita Das Saha
1
Department of Biotechnology, National Institute of Technology-Durgapur, Mahatma Gandhi Avenue, Durgapur (WB) 713209, India
Search for other works by this author on:
Jaya Srivastava
;
Jaya Srivastava
1
Department of Biotechnology, National Institute of Technology-Durgapur, Mahatma Gandhi Avenue, Durgapur (WB) 713209, India
Search for other works by this author on:
Shamik Chowdhury
1
Department of Biotechnology, National Institute of Technology-Durgapur, Mahatma Gandhi Avenue, Durgapur (WB) 713209, India
E-mail: chowdhuryshamik@gmail.com
Search for other works by this author on:
Journal of Water Reuse and Desalination (2013) 3 (2): 119-127.
Article history
Received:
July 06 2012
Accepted:
August 10 2012
Citation
Papita Das Saha, Jaya Srivastava, Shamik Chowdhury; Removal of phenol from aqueous solution by adsorption onto seashells: equilibrium, kinetic and thermodynamic studies. Journal of Water Reuse and Desalination 1 June 2013; 3 (2): 119–127. doi: https://doi.org/10.2166/wrd.2013.070
Download citation file:
Close
Citation
Papita Das Saha, Jaya Srivastava, Shamik Chowdhury; Removal of phenol from aqueous solution by adsorption onto seashells: equilibrium, kinetic and thermodynamic studies. Journal of Water Reuse and Desalination 1 June 2013; 3 (2): 119–127. doi: https://doi.org/10.2166/wrd.2013.070
Download citation file:
Close