Adsorption of methylene blue dye onto alginate-bioglass membranes: response surface method, isotherm, and kinetic studies

Authors : Hasan TÜRE

Pages : 538-552

Doi:10.17714/gumusfenbil.1245309

View : 143 | Download : 121

Publication Date : 2023-07-15

Article Type : Research Paper

Abstract :In this research, environment-friendly composite membranes based on alginate insert ignore into journalissuearticles values(ALG); and bioglass nanoparticles insert ignore into journalissuearticles values(BGs); were prepared by the solvent casting technique and utilized as adsorbents for the elimination of methylene blue insert ignore into journalissuearticles values(MB); from water. Zeta potential of the particles was determined to be -24.9 mV by laser dynamic light scattering insert ignore into journalissuearticles values(DLS);, and their sizes were found to be 773 and 777 nm by transmission electron microscopy insert ignore into journalissuearticles values(TEM); and DLS analysis, respectively. Atomic force microscope insert ignore into journalissuearticles values(AFM); analysis revealed that increasing the BGs content from 1 to 5% w/v caused the root mean square roughness of membranes to increase from 159.38 to 182.03 nm. The adsorption process was successfully modeled and optimized using a hybrid response surface methodology integrated central composite design insert ignore into journalissuearticles values(RSM-CCD);. A statistical analysis was utilized to examine and optimize the effects of three important independent variables insert ignore into journalissuearticles values(concentration of BGs insert ignore into journalissuearticles values(1-5% w/v);, pH of the solution insert ignore into journalissuearticles values(3-9);, and initial dye level insert ignore into journalissuearticles values(15-45 mg L-1);); on MB adsorption performance. The findings indicated that the quadratic model was suitable for prediction of MB\`s removal. Optimized experimental parameters were found to be a pH of 9, a contact time of 120 min, an initial MB concentration of 45 mg L-1, and a BGs concentration of 1% insert ignore into journalissuearticles values(w/v);. Freundlich isotherm and pseudo-second-order kinetic models were found to be the best-fitting models in isotherm and kinetic studies, respectively. Dubinin-Radushkevich insert ignore into journalissuearticles values(D-R); isotherm model predicted a chemical mechanism for MB adsorption onto the composite alginate membranes.
Keywords : Aljinat, Biyoaktif cam, Metilen mavisi, Optimizasyon, Cevap yüzey yöntemi