Development of Polymer‐Metal Oxide Hybrid Based on Chitosan‐Tartaric Acid/
MnO
2
Nanoparticles for Crystal Violet Dye Remo
Ahmed Saud Abdulhameed, Samaa Abdullah, Abeer A. Altamimi, Mahmoud Abualhaija ABSTRACT
In this study, chitosan polymer was chemically modified via tartaric acid crosslinking and functionalized with MnO 2 nanoparticles to develop a multifunctional polymer nanocomposite for the efficient adsorption of crystal violet dye from water. The physicochemical features of the prepared material (chitosan‐tartaric acid/MnO 2 nanoparticle, CHI‐TA/MnO 2 ) were thoroughly characterized using XRD, FTIR spectroscopy, BET surface area analysis, pH pzc determination, and SEM–EDX analysis. The adsorption performance of the CHI‐TA/MnO 2 nanocomposite toward crystal violet dye was systematically investigated and optimized using a Box–Behnken design (BBD) approach, enabling the identification of optimal operational conditions for maximum crystal violet dye removal. Optimization using the BBD model indicated that the optimal adsorption conditions for crystal violet dye removal (90.49%) were an adsorbent dosage of 0.073 g of CHI‐TA/MnO 2 , a solution pH of approximately 10, and a contact time of 55 min. The adsorption process of CV dye by CHI‐TA/MnO 2 followed the Freundlich isotherm and pseudo‐first‐order kinetics, indicating heterogeneous surface interactions, while thermodynamic parameters revealed a spontaneous and endothermic nature. The CHI‐TA/MnO 2 nanocomposite exhibited a maximum adsorption capacity of 283 mg/g. These results confirm the high potential of the developed polymer nanocomposite for effective treatment of dye‐contaminated wastewater.