Mussel-inspired polydopamine decorated pomelo peel as a durable biosorbent for adsorption of cationic dyes
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ORIGINAL RESEARCH
Mussel-inspired polydopamine decorated pomelo peel as a durable biosorbent for adsorption of cationic dyes Yifei Zhan . Lin Yang . Jianwu Lan . Jiaojiao Shang . Siqi Chen . Xinmei Guan . Wenxu Li . Shaojian Lin
Received: 6 May 2020 / Accepted: 15 October 2020 Ó Springer Nature B.V. 2020
Abstract In this work, an eco-firendly biosorbent was simply fabricated via self-polymerization of polydopamine on the porous pomelo peel. The composition and morphology of the obtained polydopamine modified pomelo peel (PP-PDA) were confirmed by Fourier transform infrared, emission scanning electron microscopy and Brunauer-Emmett-Teller surface area measurements, respectively. Next, the adsorption capacity of the PP-PDA towards various anionic and cationic dyes was investigated. Interestingly, the PP-PDA exhibited high adsorption capacity towards cationic dyes with the maximum adsorption capacities of 434.78 mg/g for methylene blue, 208.33 mg/g for neutral red and 143.88 mg/g for malachite green, respectively. Due to this adsorption feature, the PP-PDA can achieve selective adsorption Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10570-020-03541-8) contains supplementary material, which is available to authorized users. Yifei Zhan and Lin Yang as co-first author have contributed equally to this work. Y. Zhan L. Yang J. Lan (&) J. Shang S. Chen X. Guan W. Li S. Lin (&) College of Biomass Science and Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu, China e-mail: [email protected] S. Lin e-mail: [email protected]
of cationic dyes from mixtures. Meanwhile, the adsorption kinetics and adsorption isotherms of the PP-PDA towards cationic dyes obeyed pseudo-second-order kinetic and Langmuir isotherm model, respectively. Additionally, the results presented that the adsorption capacity of the PP-PDA increased with the increment of pH value of the aqueous solution, however, its adsorption capacity decreased with increasing of the salt concentration. Most importantly, the fabricated PP-PDA could be easily regenerated, its adsorption capacity could be maintained well even after twenty cycles. Therefore, the as-prepared PPPDA can be employed as a promising biosorbent for dye-contaminated wastewater of treatment. Keywords Dye adsorption Biosorbent Pomelo peel Polydopamine Recyclability
Introduction Synthetic dye plays an important role in many industries, such as textile, paper, leather, and cosmetic, for endowing products with vibrant color (Kim et al. 2008; Lu et al. 2018). However, according to a report, it estimated that over 700 thousand tons were synthesized annually (Li et al. 2013). Meanwhile, approximately 20–30% of dyes are discharged during the practical application owing to the limited dyeing rate, resulting in the coloration and toxicity of the effluent.
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Cellulose
Moreover, the natural environment and the health of human beings are continually threatened by th
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