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Published on: February 12, 2019
High Efficiency of the Graphene-Decorated Boron Nitride for Dye Removal from Aqueous Solution: Modeling and
Romuald Teguia Doumbi1,2, Paulino Vasco Mariano Muguirrima1, Artur de Morais1
1Postgraduate Program in Materials Science and Engineering, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte 59078-970, Brazil.
Abstract:
This study reports the use of graphene-decorated boron nitride (GBN) as an efficient adsorbent for azo dyes, with the aim of treating textile wastewater. GBN was synthesized by a facile route and characterized by XRD, SEM/EDS, TGA-DTA, and BET analyses, revealing a microporous and crystalline structure. Methyl orange (MO) was adopted as a model dye, and batch adsorption experiments were optimized by using response surface methodology (RSM) with pH, adsorbent mass, and initial MO concentration as variables. Results showed that the pH and adsorbent mass were the main factors influencing MO removal. Under optimal conditions (pH 2, 0.062 g of adsorbent, 100 mg/L MO), GBN reached a high adsorption capacity of 322.5 mg/g in 20 min and retained good performance after 10 reuse cycles. The synergistic properties of graphene and boron nitride make GBN a promising material for efficient textile wastewater treatment.
