Hemp Modified with Betaine as a Green and Efficient Adsorbent for Removal of Anionic Dyes from Water
2024
Milošević, Milena | Marinković, Aleksandar | Vuksanović, Marija | Veličković, Zlate | Đuričković, Ivan | Najdanović, Božidar | Knežević, Nataša
In this work, natural lignocellulosic material, hemp fiber (HF), was functionalized with betaine and then cross-linking with tartaric acid to produce membrane (MHB-TA) effective in a two anionic dyes removal, Acid Blue 92 (AB92) and Congo Red (CR), from water. The obtained MHB-TA was structurally and morphologically characterized using FTIR and SEM analysis. The effects of initial dye concentration, pH, contact time, and temperature of anionic dyes on adsorption were studied in adsorption experiments performed by batch systems. The calculated maximum adsorption capacities of 352.27 mg g-1 and 382.63 mg g-1 for AB92 and CR, respectively, were obtained from Langmuir model fitting at 25°C. The calculated thermodynamic parameters indicate that the process is spontaneous and endothermic with participation of both physisorption and chemisorption processes. The kinetic experimental parameters were fitted through a pseudo-second-order model and a Weber–Morris model. The results present the high applicability of MHB-TA for wastewater purification.
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Editeur University of Belgrade, Technical faculty in Bor (Serbia)
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