Bisphenol A Removal from Water by Activated Carbon. Effects of the Carbon Characteristics and Solution Chemistry

摘要

The present study aimed to analyse the behaviour of different activated carbons in the adsorption and removal of bisphenol Arn(2-2-bis-4-hydroxyphenil propane) from aqueous solutions in order to know the parameters that determine this process. Tworncommercial activated carbons and one prepared in our laboratory from almond shells were used; they were texturally andrnchemically characterised, obtaining the surface area, pore size distribution, mineral matter content, elemental analysis,rnoxygen surface groups and pH of the point of zero charge ( pH pHPZC PZC), among other parameters. Adsorption isotherms ofrn), bisphenol A and adsorption capacities were obtained. The capacity of the carbons to remove bisphenol A was related to theirrncharacteristics. Thus, the highest adsorption capacity was found in the carbon sample with lowest pH pHPZC PZC. Influences of thern. Mineral matter present in the carbon samples and the solution chemistry (pH and ionic strength) were also analysed.