Efficiency of adsorbents for removal of organosulphur compounds in water

Four carbonaceous adsorbents - Ambersorb XEN-563, Carbochem LQ830, Carboche m LQ1000 and Morganite FY5 - were evaluated in terms of adsorptive capacity for organosulphur compounds (thiodiglycol, ethyl 2-hydroxyethylsulphide, 1 ,4-thioxane, ethyl vinylsulphide) in water. The adsorption isotherms in sin gle-solute and multi-component systems were fitted to Freundlich isotherms which give a first-cut estimation of the adsorptive capacities and breakthr ough times. All four adsorbents demonstrated decreasing adsorptive capacity with increasing polarity of the adsorbates. Morganite FY5 and Ambersorb XE N-563 exhibited the highest adsorptive capacity for the selected adsorbates . The study was also extended to six non-carbonaceous adsorbents - Amberlit e XAD-4 and XAD-7; Biobeads SM2, SM4 and SM7; and molecular sieve 13X. The overall efficiency of adsorption of the four vessicants was SM4 > XAD-4 > S M2 > SM7 > XAD-7 > 13X. (C) 1998 Published by Elsevier Science Ltd. All rig hts reserved.