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.