Bioremoval of methylene blue from aqueous solutions by Syringa vulgaris L. hull biomass
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ORIGINAL ARTICLE
Bioremoval of methylene blue from aqueous solutions by Syringa vulgaris L. hull biomass Ekrem Gulluce1 · Mehmet Karadayi2 · Medine Gulluce2 · Gokce Karadayi3 · Volkan Yildirim2,4 · Dilfuza Egamberdieva5,6 · Burak Alaylar7 Received: 4 April 2020 / Revised: 26 August 2020 / Accepted: 30 August 2020 / Published online: 8 September 2020 © Society for Environmental Sustainability 2020
Abstract The adsorption capacity of Syringa vulgaris L. (the common lilac) hull was investigated in this study for methylene blue dye removal. Biosorption assays were performed with varying dye concentration, contact time, pH, biosorbent dosage and temperature. Besides, the equilibrium, thermodynamics and kinetics of the process were designated for the evaluation of the biosorption process. According to the results, removal of the dye reached up to 97.5% for the optimized reaction conditions (adsorbent dose: 2.5 g; stirring speed: 150 rpm; initial dye conc. 5 mg/L; temperature: 333 K; agitation time: 30 min and pH: 6). Kinetic study recommended the pseudo-second order kinetic model with regression coefficient (R2 > 0.999) as being able to better define kinetic data than pseudo-first order and Elovich kinetic models. The biosorption isotherm data were analyzed using Freundlich, Langmuir, Dubinin–Radushkevich and Temkin isotherms for the proposed biosorption process. The endothermic and spontaneous nature of the proposed process was revealed by the thermodynamic studies. Finally, it is concluded that S. vulgaris L. hull biomass can be employed as an economically reasonable, eco-friendly, and sustainable biosorbent in the treatment of industrial effluents containing methylene blue-like dyes. Keywords Biosorption · Syringa vulgaris · Methylene blue · Equilibrium studies · Kinetics · Thermodynamics
Introduction
* Burak Alaylar [email protected] 1
Department of Environmental Engineering, Faculty of Engineering, Atatürk University, Erzurum, Turkey
2
Department of Biology, Faculty of Science, Atatürk University, Erzurum, Turkey
3
Department of Molecular Biology and Genetics, Faculty of Science, Atatürk University, Erzurum, Turkey
4
East Anatolia High Technology Application and Research Center, Atatürk University, Erzurum, Turkey
5
Department of Microbiology, Faculty of Biology, National University of Uzbekistan, Tashkent, Uzbekistan
6
Leibniz Centre for Agricultural Landscape Research (ZALF), Müncheberg, Germany
7
Department of Molecular Biology and Genetics, Faculty of Science and Art, Agri Ibrahim Cecen University, Agri, Turkey
Today, mankind faces major dilemma regarding the industrial development, which has increased the welfare of civilizations, while has led to irreversible destruction to ecosystems (Singh et al. 2017). Recent studies emphasize the necessity of new biotechnological approaches to eliminate the parameters that have negative effects on ecosystems in order to ensure sustainable and safe development (Alvi et al. 2018; Khurana et al. 2017; Sun et al. 2018; Yan et al. 2017). In this reg
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