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Liu L.,Zhejiang Sci-Tech University | Liu L.,National Engineering Laboratory of Textile Fiber Materials & Processing Technology | Xie J.P.,Zhejiang Sci-Tech University | Li Y.J.,Zhejiang Sci-Tech University | And 3 more authors.
Cellulose | Year: 2016

We present a simple synthetic method for the preparation of cellulose-g-poly(acrylic acid-co-acrylamide) materials with three-dimensional macroporous structure, which can be used for the environmental application as the reusable bioadsorbents. In the grafting copolymerization process, the acrylic acid and acrylamide are cross-linked with cellulose molecules to form three-dimensional interconnected porous structure. Due to the macropores and the abundant functional groups, the cellulose-based bioadsorbents exhibit excellent adsorption performance for the removal of nickel ions from aqueous solution with a maximum adsorption capacity of 171.8 mg/g. The adsorption of bioadsorbents to Ni2+ is accurately described by a pseudo-second-order kinetic model and the initial concentration-dependent adsorption isotherm suggests a Langmuir isotherm model. Furthermore, the cellulose-based bioadsorbents can be easily separated from the aqueous solution after adsorption and regenerated using 0.2 M HCl solution, which exhibits high adsorption capacity after six adsorption–desorption cycles. Importantly, the biodegradation rate of 53.1 wt% for the bioadsorbents is found after being incubated in the soil extraction solution for 90 days. Therefore, the eco-friendly cellulose-based bioadsorbents could be used for water purification effectively. © 2015, Springer Science+Business Media Dordrecht.

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