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    Preparation of a Novel Cellulose-Styrene Copolymer Adsorbent and Its Adsorption of Nitrobenzene from Aqueous Solutions

    Year: 2021

    Journal: Polymers, Volume 13, FEB

    Authors: Yang, Guifang; Lin, Na; Li, Yuan; Ye, Xiaoxia; Liu, Yifan; Lv, Yuancai; Lin, Chunxiang; Liu, Minghua

    Organizations: Natural Science Foundation of China [51908132, 21577018]; Open Foundation of the Fujian Provincial Key Laboratory of Ecology-Toxicological Effects and Control for Emerging Contaminants [PY19003]

    Keywords: cellulose; styrene; hydrophobicity; nitrobenzene; polymerization

    A novel cellulose-styrene copolymer adsorbent (cellulose-St) was prepared using free radical polymerization. Successful polymerization was confirmed through Fourier Transform Infrared Spectroscopy (FTIR), Carbon 13 Solid Nuclear Magnetic Resonance (C-13 NMR) Spectroscopy, Scanning Electron Microscopy (SEM), etc. Cellulose-St possessed good hydrophobicity, and the best water contact angle of cellulose-St samples could reach 146 degrees. It had the ability of adsorption for nitrobenzene (NB), and the adsorption process could be well described by the pseudo-second-order (R-2 > 0.99) and three-stage intraparticle diffusion (R-2 > 0.99) kinetic models. Furthermore, the dynamic adsorption experiments revealed that cellulose-St had the potential for continuous separation of NB in water, and the breakthrough point for the initial NB concentration of 10 mg/L reached 1.275 L/g. Moreover, cellulose-St exhibited excellent environmental adaptability that it could maintain its hydrophobicity and adsorption ability for NB in strong acids, strong alkalis, or organic solvents. The used cellulose-St could be reused after washing with ethanol and keep almost constant adsorption capacity after ten cycles.
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