Biosorption performance and cell surface properties of a fungal-based sorbent in azo dye removal coupled with textile wa
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ORIGINAL PAPER
Biosorption performance and cell surface properties of a fungal‑based sorbent in azo dye removal coupled with textile wastewater Hoda Nouri1 · Ehsan Azin1 · Aliyeh Kamyabi1 · Hamid Moghimi1 Received: 9 July 2020 / Revised: 17 September 2020 / Accepted: 31 October 2020 © Islamic Azad University (IAU) 2020
Abstract In this work, the biosorption ability of Sarocladium sp. dried biomass to remove Remazol Black dye has been studied. Optimum inoculum size and initial dye concentration were determined, and the salinity effect on the dye removal was evaluated. In the following, kinetic and isotherm of the adsorption were studied, and the adsorbent characteristics were determined using Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy, zeta potential, and Brunauer–Emmett–Teller analysis. Based on the results, maximum and minimum dye removal was determined at 1000 and 200 mg L−1 of Remazol Black dye as 54.39 and 24.02 mg g−1, respectively. Among the various azo dyes including Reactive yellow 145, Reactive blue 222, Reactive red 43, Direct blue 21, and Acid blue 161, dye removal capability of 87.96–97.43% was obtained. The solution salinity showed positive effect on the biosorption process. The biomass pretreatment with calcium nitrate enhanced the removal capacity by 70.48% and the maximum reduction in dye removal (− 61%) was obtained when the fungal biomass was treated by sodium hydroxide. Biosorption kinetic follows the first-pseudo-order model, and the obtained data best fits both Langmuir and Freundlich isotherm models. The maximum adsorption capacity of dried biomass for dye removal was 58.48 mg g−1. Based on FTIR, zeta potential value and pretreatment results, Yoshida H-binding, dipole–dipole H-binding, π–π and n–π interactions were probably involved in the dye adsorption process. The results showed that biomass has a high potential for different dyes adsorption from real textile wastewater. The present study declares the high potential of Sarocladium sp. dried biomass as an effective and inexpensive biosorbent which can be used for bio-treatment of effluents with multi-dyes.
Editorial responsibility: Anna Grobelak. Electronic supplementary material The online version of this article (https://doi.org/10.1007/s13762-020-03011-5) contains supplementary material, which is available to authorized users. * Hamid Moghimi [email protected] 1
Department of Microbial Biotechnology, School of Biology, College of Science, University of Tehran, Tehran 1417864411, Iran
13
Vol.:(0123456789)
International Journal of Environmental Science and Technology
Graphic abstract
Keywords Biosorption · Isotherm study · Remazol black dye · Sarocladium sp. · Textile wastewater
Introduction Azo dyes are the largest class of synthetic dyes that are widely used in various industries such as textile, food and cosmetics (Yang et al. 2005). Also, azo dyes comprise up to 70% of dyestuff used in textile manufacturers (Lang et al. 2013). They are characterized by the presence of –N=N– bond i
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