Research Article Removal of Dye from Wastewater Using a Novel Composite Film Incorporating Nanocellulose Ismat Ara Eti, 1 Marufa Khatun, 1 Most. Afroza Khatun, 1 Md. Owaleur Rahman, 1 K. M. Anis-Ul-Haque, 2 and Md. Jahangir Alam 1 1 Department of Chemical Engineering, Jashore University of Science and Technology, Jashore 7408, Bangladesh 2 Department of Chemistry, Jashore University of Science and Technology, Jashore 7408, Bangladesh Correspondence should be addressed to Md. Jahangir Alam; jahangirche@gmail.com Received 17 July 2022; Revised 27 October 2022; Accepted 24 November 2022; Published 20 January 2023 Academic Editor: Arunas Ramanavicius Copyright © 2023 Ismat Ara Eti et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Research shows that the composite material is used as an adsorbent to remove pollutants from wastewater. This work is aimed at producing a novel composite film comprising chitosan, polyvinyl alcohol, and cornstarch incorporating nanocellulose (CPCN). The composite film was prepared by a blending method wherein nanocellulose was extracted using a chemical method from banana bract. The prepared CPCN was characterized using Fourier-transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) with EDX to understand their molecular interaction and surface morphology, respectively. The effect of parameters including pH, adsorbent dosage, initial dye concentration, and contact time on the adsorption of methylene blue (MB) dye was studied. The maximum adsorption was found to be up to 63.13 mg/g MB with a pH of 10, adsorbent dosage of 2 g, an initial concentration of 150 ppm, and contact time of 120 min at room temperature (25 ° C) indicating a moderate adsorption capacity of the CPCN. Comparing the Langmuir and Freundlich adsorption isotherm models, the former fitted well with MB dye adsorption data, implying that the models can be applied to uptake MB dye by CPCN. In the kinetic adsorption experiment, the adsorbed dye almost reached equilibrium at about 120 min for the CPCN and followed the pseudo-second-order kinetic model. Therefore, the CPCN can be used as a potential adsorbent in wastewater treatment. 1. Introduction Recently, the highly polluting nature of conventional plastic films compelled scientists to consider the development of novel edible composite films [1]. The capacity of biopolymer-based conductive polymer composites (CPCs) to increase the shelf life or enhance the safety of food would open up numerous opportunities for active packaging in the food packaging industry [2, 3]. In addition, these kinds of materials can also be used as adsorbents in biological applications such as bio- sensors [4], drug delivery systems, neural electrodes, and bioactuators [5], as well as in wastewater treatment [6, 7], and water quality measurement [8]. Chitosan is a type of chi- tin that occurs naturally in the exoskeletons of crustaceans and contains a few acetyl groups. It is the second most abundant natural biopolymer by volume. Chitosan is a great film- forming material with outstanding gas permeability and cov- ered mechanical properties, as well as being biodegradable, nontoxic, and exhibiting significant antibacterial and antifun- gal activity and low oxygen and carbon dioxide permeability [9–11]. The PVA is a biopolymer with unique qualities such as excellent moisture absorption, fiber formability, biocompat- ibility, chemical tolerance, biodegradability, and swelling prop- erties. It is a copolymer of vinyl alcohol and vinyl acetate [12]. Cornstarch, a natural, affordable, and biodegradable polymer, has long been used as a substitute for synthetic polymers gen- erated from petroleum [13]. It is derived from the endosperm of the kernel and typically consists of 27% amylose and 73% amylopectin. On the other hand, nanomaterial attained from plant resources with various application forecasts has attracted significant attention. Nanocellulose is the natural fiber extracted from cellulose, the main structural component of plant cell walls. This material (nanocellulose) shows promise Hindawi Advances in Polymer Technology Volume 2023, Article ID 4431941, 9 pages https://doi.org/10.1155/2023/4431941