Adsorption behavior of optical brightening agent on microfibrillated cellulose studied through inverse liquid chromatography: The need to correct for axial dispersion effect

摘要

Highlights?Inverse Liquid Chromatography was used to study adsorption capacity of micro fibrillated cellulose.?The packing of the column with micro fibrillated cellulose caused important axial dispersion.?Using an inverse method considering axial dispersion provided a satisfactory fitting to the chromatogram data.AbstractInverse liquid chromatography is a technique for studying solid/liquid interaction and most specifically for the determination of solute adsorption isotherm. For the first time, the adsorption behaviour of microfibrillated cellulose was assessed using inverse liquid chromatography. We showed that microfibrillated cellulose could adsorb 17?mg/g of tetrasulfonated optical brightening agent in typical papermaking conditions. The adsorbed amount of hexasulfonated optical brightening agent was lower (7?mg/g).The packing of the column with microfibrillated cellulose caused important axial dispersion (展开▼