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Adsorption isotherm, kinetic and mechanism studies of 2-nitrophenol on sedimentary phosphate

Hind Yaacoubi, Zuo Songlin, Mustapha Mouflih, Mina Gourai, Said Sebti


Sedimentary phosphate (SP) was used as an adsorbent for the removal of 2-nitrophenol from aqueous solutions in an attempt to investigate (the feasibility of) its application (to) in wastewater purification.  The adsorbent was characterized by X-ray diffraction (XRD), IR spectroscopy, Fluorescence X and BET.  The results indicated that the SP (was) is francolite (Ca10 (PO4,CO3)6F2) and mesoporous. The effect of the adsorption time and the pH of the solution were studied. The pseudo-first-order, pseudo-second-order and intraparticle diffusion models were used to fit adsorption data in the kinetic studies. The equilibrium isotherms were determined using the Langmuir, Freundlich and Dubinin-Radushkevich models. The results show that the Dubinin-Radushkevich isotherm had better agreement with the 2-nitrophenol adsorption on SP with a correlation coefficient of 0.98, an equilibrium adsorption capacity of 633 mg. g-1 and a corresponding contact time of 2 h. The results imply that intraparticle diffusion could be summarized as the basic rate-controlling mechanisms during 2-nitrophenol adsorption on SP.

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- G. Busca, S. Berardinelli, C. Resini and L. Arrighi, Technologies for the removal of phenol from fluid streams. J. Hazard. Mater, 2008, 160, 265-288.

- A. Kumar, S. Kumar and D. V. Gupta, Adsorption of phenol and 4-nitrophenol on granular activated carbon in basal salt medium: Equilibrium and kinetics, J. Hazard. Mater, 2007, 147, 155-166.

- M. T. A. Reis, O. M. F. de Freitas, M. R. C. Ismael and J. M. R. Carvalho, Recovery of phenol from aqueous solutions using liquid membranes with Cyanex 923, J. Membrane Sci., 2007, 305, 313-324.

- T. A. Egerton, P. A. Christensen, R. W. Harrison and J. W. Wang, The effect of UV absorption on the photocatalytic oxidation of 2-nitrophenol and 4-nitrophenol, J. Appl. Electrochem., 2005, 35, 799-813.

- C. Yang, Y. Qian, L. Zhang and J. Feng, Solvent extraction process development and onsite trial-plant for phenol removal from industrial coal-gasiï¬cation wastewater, J. Chem. Eng., 2006, 117, 179-185.

- A. Hassine et al., Palladium supported on natural phosphate: catalyst for Suzuki coupling reactions in water, Appl. Catal. A, 2013, 450, 13-18.

- A. Aklil, M. Mouflih and S. Sebti, Removal of heavy metal ions from water by using calcined phosphate as a new adsorbent, J. Hazard. Mater, 2004, 112, 183-190.

- M. Mouflih, A. Aklil, N. Jahroud, M. Gourai and S. Sebti, Removal of lead from aqueous solutions by natural phosphate, Hydrometallurgy, 2006, 81, 219-225.

- M. Mouflih, A. Aklil and S. Sebti, Removal of lead from aqueous solutions by activated phosphate, J. Hazard. Mater, 2005, 119, 183-188.

- H. Yaacoubi, O. Zidani, M. Mouflih, M. Gourai and S. Sebti, Removal of cadmium from water using natural phosphate as adsorbent, Procedia Eng., 2014, 83, 386-393.

- X. Cao, L. Q. Ma, D. R. Rhue and C. S. Appel, Mechanisms of lead, copper, and zinc retention by phosphate rock, Environ. Pollut., 2004, 131, 435-444.

- A. Denizli, G. Okan and M. Ucar, Dye-affinity microbeads for removal of phenols and nitrophenols from aquatic systems, J. Appl. Polym. Sci., 2002, 83, 2411-2418.

- J. C. Cannata et al., Adsorption of phenol and nitrophenols by carbon nanospheres: Effect of pH and ionic strength, Sep. Purif. Technol., 2011, 80, 217-224.

- S. Hamidouche et al., Simultaneous sorption of 4-nitrophenol and 2-nitrophenol on a hybrid geocomposite based on surfactant-modified pillared-clay and activated carbon, Chem. Eng. J., 2015, 279, 964-972.

- H. B. Senturk, Removal of phenol from aqueous solutions by adsorption onto organomodified Tirebolu bentonite: Equilibrium, kinetic and thermodynamic study, J. Hazard. Mater., 2009, 172, 353-362.

- S. Brunauer, The Adsorption of Gases and Vapours; Oxford University Press: London, 1944, 150.

- A. Abdelwahab and N. K. Amin, Adsorption of phenol from aqueous solutions by Luffa cylindrica fibers: Kinetics, isotherm and thermodynamic studies, Egypt. J. Aquat. Res., 2013, 39, 215-223.

- T. Kalayci, B. Bardakçi and N. K. Kınaytürk, Removal of 2-Nitrophenol by Linde Type A (LTA) zeolites, Int. J. Phys. Sci., 2013, 8 (1), 1-5.

- H. S. Wahab, Molecular modeling of the adsorption and initial photocatalytic oxidation step for para-nitrophenol on nano-sized TiO2 surface, Surf. Sci., 2012, 606, 624-633.

- J. Zhang, C. Wu, A. Jia and B. Hu, Kinetics, equilibrium and thermodynamics of the sorption of p-nitrophenol on two variable charge soils of Southern China, Appl. Surf. Sci., 2014, 298, 95-101.

- Y. Ma et al., Preparation of a novel magnetic microporous adsorbent and its adsorption behavior of p-nitrophenol and chlorotetracycline, J. Hazard. Mater. 2014, 266, 84-93.



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