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Efficient Removal of Toxic Bromothymol Blue and Methylene Blue from Wastewater by Polyvinyl Alcohol

Agarwal, Shilpi and Sadegh, Hamidreza and Monajjemi, Majid and Hamdy, Abdel Salam and Ali, Gomaa A. M. and Memar, Amir O. H. and Shahryari-ghoshekandi, Ramin and Tyagi, Inderjeet and Gupta, Vinod Kumar (2016) Efficient Removal of Toxic Bromothymol Blue and Methylene Blue from Wastewater by Polyvinyl Alcohol. Journal of Molecular Liquids, 218. pp. 191-197. ISSN 0167-7322

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Removal of bromothymol blue (BTB) and methylene blue (MB) from wastewater using polyvinyl alcohol (PVA) has been elucidated in the present work.PVA exhibited high adsorption capacity and more active sites for the highly efficient removal of these toxic dyes. The impact of several variables such as concentration, contact time, pH and temperature were studied. The optimum pH and contact time for the high efficient removal were found to be 6 and 10 min, respectively. The adsorption isotherms were well interpreted by Freundlich and Langmuir models. The maximum adsorption capacities obtained from Langmuir model were 276.2 and 123.3 mg g− 1 for BTB and MB, respectively. In addition, the removal efficiencies for both adsorbates respectively, were found to be 98.65 and 61.32%. Several adsorption kinetic models were used to fit the experimental data, such as simple-first-order, the pseudo-first-order, pseudo-second-order and intraparticle diffusion models. The adsorption process concurrently adapted to the pseudo-second-order kinetics and it was found to be the best fitting model with the obtained experimental data.

Item Type: Article
Uncontrolled Keywords: Adsorption; Kinetic models; Polyvinyl alcohol; Bromothymol blue; Methylene blue; Wastewater treatment
Subjects: Q Science > QD Chemistry
Faculty/Division: Faculty of Industrial Sciences And Technology
Depositing User: Mrs. Neng Sury Sulaiman
Date Deposited: 31 Mar 2016 02:25
Last Modified: 25 Aug 2016 05:30
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