Production of modified bentonite via adsorbing lignocelluloses from spent liquor of NSSC process

Bioresour Technol. 2014 Dec:174:152-8. doi: 10.1016/j.biortech.2014.10.014. Epub 2014 Oct 23.

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.

Keywords: Adsorption; Bentonite; Biorefinery; Lignocelluloses; NSSC spent liquor.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adsorption
  • Bentonite / chemistry*
  • Biological Oxygen Demand Analysis
  • Biotechnology / methods*
  • Kinetics
  • Lignin / chemistry*
  • Molecular Weight
  • Nephelometry and Turbidimetry
  • Polyethylenes / chemistry
  • Polysaccharides / chemistry
  • Quaternary Ammonium Compounds / chemistry
  • Sulfites / chemistry*
  • Temperature
  • Thermogravimetry
  • Time Factors
  • Waste Disposal, Fluid*

Substances

  • Polyethylenes
  • Polysaccharides
  • Quaternary Ammonium Compounds
  • Sulfites
  • lignocellulose
  • Bentonite
  • poly-N,N-dimethyl-N,N-diallylammonium chloride
  • hemicellulose
  • Lignin