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Abstract
Recycling and reusing glass fiber waste (GFW) has become an environmental concern, as the means of disposal are becoming limited as GFW production increases. Therefore, this study developed a novel, cost-effective method to turn GFW into a mesoporous zeolite-like nanomaterial (MZN) that could serve as an environmentally benign adsorbent and efficient remover of methylene blue (MB) from solutions. Using the Taguchi optimizing approach to hydrothermal alkaline activation, we produced analcime with interconnected nanopores of about 11.7 nm. This MZN had a surface area of 166 m2 g−1 and was negatively charged with functional groups that could adsorb MB ranging from pH 2 to 10 and all with excellent capacity at pH 6.0 of the maximum Langmuir adsorption capacity of 132 mg g−1. Moreover, the MZN adsorbed MB exothermically, and the reaction is reversible according to its thermodynamic parameters. In sum, this study indicated that MZN recycled from glass fiber waste is a novel, environmentally friendly means to adsorb cation methylene blue (MB), thus opening a gateway to the design and fabrication of ceramic-zeolite and tourmaline-ceramic balls and ceramic ring-filter media products. In addition, it has environmental applications such as removing cation dyes and trace metal ions from aqueous solutions and recycling water.
Highlights
This study successfully developed a novel mesoporous analcime mesoporous zeolite-like nanomaterial (MZN) from the glass fiber waste to adsorb methylene blue (MB) from solutions effectively
The adsorption isotherms could be described by both the Langmuir adsorption isotherm model and the kinetics by the pseudo-second-order kinetic model
Thermodynamic parameters depicted that the reaction was both exothermic and reversible for MB
Summary
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. Glass fiber (GF) is commonly used as a reinforcement material, heat resistor, or stiffness filler in a wide variety of industries, such as renewable energy (wind turbines) [1], electronics (printed circuit boards) [2], automotive [3], aircraft, and aerospace [4]. Growth in the global glass fiber market is incremental, with a 4% rise expected for the period. As a large amount of waste is generated from these manufacturing processes, disposing of GF waste in an environmentally sound manner has become a serious issue. The development of a novel nanomaterial composed of glass fiber waste (GFW)
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