title: Adsorption of lignocelluloses of pre-hydrolysis liquor on calcium carbonate to induce functional filler.
abstract: In this work, we aimed at adsorbing the oligo-sugars of prehydrolysis liquor on precipitated calcium carbonate (PCC) to produce modified PCC. The results showed that the adsorptions of oligo-sugars, lignin and furfural were greater on porous PCC (PCC2) than on nano-sized PCC (PCC1) due to the larger surface area of PCC2. The adsorption reached its maximum in 5 h on PCC1, but it gradually increased on PCC2 due to the diffusion of oligo-sugars and lignin into the pores of PCC2. Also, the experimental isotherm and kinetic results were well fitted into Langmuir and pseudo-second order models, respectively. The adsorption was greater at a lower temperature (i.e. 40°C) and pH (i.e. 7). Alternatively, cationic poly acrylamide (CPAM) was added to the PHL/PCC system, which led to more promising results (than that to PHL/PCC system) with the maximum lignocelluloses adsorption of 0.36 g/g on PCC2, among which 0.22 g/g was oligo-sugars.
authors.affiliation: Department of Chemical Engineering, Lakehead University, Thunder Bay, Ontario, Canada P7B 5E1. pfatehi@lakeheadu.ca
authors.forename: Pedram
authors.initials: P
authors.lastname: Fatehi
authors.forename: Fadia C
authors.initials: FC
authors.lastname: Hamdan
authors.forename: Yonghao
authors.initials: Y
authors.lastname: Ni
mesh_terms: D031002:Acer / Q000737:chemistry; D000180:Acrylic Resins / Q000737:chemistry; D000327:Adsorption; D029662:Betula / Q000737:chemistry; D002119:Calcium Carbonate / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D006868:Hydrolysis; D007700:Kinetics; D008031:Lignin / Q000737:chemistry*; D032107:Populus / Q000737:chemistry; D013696:Temperature; D014934:Wood / Q000737:chemistry; D000099166:Polyacrylamides
chemical_list: D000180:Acrylic Resins; D002119:Calcium Carbonate; D008031:Lignin; D000099166:Polyacrylamides; C036909:lignocellulose