title: Production of modified bentonite via adsorbing lignocelluloses from spent liquor of NSSC process.
abstract: In this work, the adsorption of lignocelluloses from spent liquor (SL) of neutral sulfite semi chemical (NSSC) pulping process on bentonite was investigated. It was observed that 0.26g/g of lignin and 0.27g/g of hemicelluloses from SL were adsorbed on bentonite under the conditions of 50°C, 100rpm and 40g/gSL/bentonite after 3h of treatment. The adsorptions of lignin and hemicellulose were increased to 1.8g/g and 0.45g/g, respectively, via adding 15mg/g of polydiallyldimethylammonium chloride (PDADMAC) in the system of SL/bentonite. The turbidity and COD removals were improved from 69% to 93% and from 25% to 38% by adding PDADMAC to the SL/bentonite system, respectively. The increase in the heating value of bentonite (from 0 to 15.4MJ/kg) confirmed the adsorption of lignocelluloses. The modified bentonite can be used as filler in corrugated medium paper production or as fuel.
authors.affiliation: Chemical Engineering Department, Lakehead University, 955 Oliver Road, Thunder Bay, Ontario P7B 5E1, Canada.
authors.forename: Farshad
authors.initials: F
authors.lastname: Oveissi
authors.affiliation: Chemical Engineering Department, Lakehead University, 955 Oliver Road, Thunder Bay, Ontario P7B 5E1, Canada. Electronic address: pfatehi@lakeheadu.ca.
authors.forename: Pedram
authors.initials: P
authors.lastname: Fatehi
mesh_terms: D000327:Adsorption; D001546:Bentonite / Q000737:chemistry*; D057919:Biological Oxygen Demand Analysis; D001709:Biotechnology / Q000379:methods*; D007700:Kinetics; D008031:Lignin / Q000737:chemistry*; D008970:Molecular Weight; D009391:Nephelometry and Turbidimetry; D011095:Polyethylenes / Q000737:chemistry; D011134:Polysaccharides / Q000737:chemistry; D000644:Quaternary Ammonium Compounds / Q000737:chemistry; D013447:Sulfites / Q000737:chemistry*; D013696:Temperature; D013818:Thermogravimetry; D013997:Time Factors; D014865:Waste Disposal, Fluid
chemical_list: D011095:Polyethylenes; D011134:Polysaccharides; D000644:Quaternary Ammonium Compounds; D013447:Sulfites; C036909:lignocellulose; D001546:Bentonite; C041004:poly-N,N-dimethyl-N,N-diallylammonium chloride; C007916:hemicellulose; D008031:Lignin
keywords: Adsorption; Bentonite; Biorefinery; Lignocelluloses; NSSC spent liquor