Effective Removal of Methylene Blue from Wastewater Using NiO and Triethanolamine-Modified Electrospun Polyacrylonitrile Nanofiber

OpenAlex İngilizce

Methylene blue is a type of azo pollutant that is used in the textile industry and endangers natural resources and human health by mixing wastewater into nature and drinking water. The aim of this study was to create active sites on the surface of PAN nanofibers for methylene blue (MB) adsorption. For this purpose, nanofibers obtained from polyacrylonitrile by the electrospinning method were modified with NiO nanoparticles (Ni) and treated with triethanolamine (TEA). The nanofiber obtained via treatment with tea was labeled as Am. The obtained nanofibers (Am/PAN/Ni-nl, PAN/Ni-nl, Am/PA-nl, and PAN-nl) were characterized comparatively by BET, FT-IR and SEM, and the adsorption performance was evaluated by time-dependent qe, isotherm, kinetic and thermodynamic graphs. The shortest equilibrium time of 20 min and the highest equilibrium amount of 45.96 mg g−1 were reached with 0.1 g of Am/PAN/Ni-nl. The Langmuir isotherm and pseudo-second-order kinetics were found to be appropriate, with an R2 value of 0.9987. The enthalpy change was calculated as −92.947 kJ mol−1. Using RSM, the adsorption for Am/PAN/Ni-nl obeyed the quadratic model and the adsorbent exhibited a maximum adsorption capacity of 52.3575 mg g−1 for methylene blue at pH 6, 25 °C and 140 ppm.