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  • 1 Department of Chemistry, Liverpool Polytechnic, Byrom Street, L3 3AF Liverpool, England
  • 2 Chemical Defence Establishment, Porton, Wiltshire England
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A study has been made on the effect of pH upon the equilibrium adsorption capacity of triethyl phosphate, dimethyl phosphate and orthophosphate on to activated carbon cloth. It is shown that for molecular phosphates no dependence upon pH exists, whilst the adsorption of ionic phosphates exhibit a strong pH dependence. These adsorption trends may be explained in terms of pKa values, ionic strength and the surface charge of the activated carbon cloth is aqueous solution.