Study on cellulose microfilaments based composite spheres: Microwave-assisted synthesis, characterization, and application in pollutant removal. (15th December 2018)

• Record Type: Journal Article
• Authors: Li, Yuan; Xiao, Huining; Pan, Yuanfeng; Zhang, Min; Ni, Shuzhen; Hou, Xiaobang; Hu, Erfeng
• Is Part Of: Journal of environmental management. Volume 228(2018)
• Page Start: 85
• Page End: 92
• Publication Date: 2018-12-15
• Subjects: Cellulose filaments spheres -- Microwave-assisted -- Thermal-responsive -- Adsorption -- Kinetics; Environmental policy -- Periodicals; Environmental management -- Periodicals; Environment -- Periodicals; Ecology -- Periodicals; 363.705
• DOI: 10.1016/j.jenvman.2018.09.021
• Languages: English
• ISSNs: 0301-4797

Abstract

Abstract: A novel study of synthesizing the temperature-responsive polymer grafted cellulose filaments/Poly (N-isopropylacrylamide) (NIPAM) spheres (P-MCCBs) was carried out for the removal of dyes and heavy metal ions. The novelty of the presented work consists of the application of the nano-sized pore-forming agent (Calcium Carbonate) and the introduction of a temperature-responsive monomer (NIPAM) while preparing the adsorbents. In addition, the spherical adsorbents were synthesized through an in-situ free radical polymerization using a microwave-assisted heating approach. The morphology, chemical structure, pH, and thermal sensitivity of P-MCCBs were characterized properly. The adsorption and desorption behaviors of dyes and heavy metal ions on P-MCCBs were also investigated. The results showed that P-MCCBs exhibited a fast adsorption rate, the adsorption equilibrium reached within 80 min and 40 min for MB and Pb 2+, respectively (25 °C). Moreover, around 5–8% and 20% of adsorbed MB and Pb 2+ were released at the temperature above 45 °C. The adsorption kinetics followed pseudo-second-order model, and the desorption process was fit well using Higuchi and Korsmeyer-Peppas models. These results indicated that P-MCCBs could be served as a novel material for controllable adsorption and desorption processes of various contaminants. Graphical abstract: Highlights: A novel study on temperature-responsive cellulose filaments spheres (P-MCCBs). P-MCCBs exhibited the temperature sensitivity on contaminants adsorption. A controllable desorption process of methylene blue and Pb 2+ was observed. The mechanism of the desorption process was studied using various kinetics models. P-MCCBs is a sustainable renewable bio-adsorbent for effluent treatment.