Avolume-basedmethodformeasuringparticle-sizedistribution(PSD)fractaldimensionsofporousmediumswasdevelopedbyemployinglasersize-analyzingtechnology.ComparedwithconventionalapproachesofusinghydrometerorscreentodeterminePSD,thismethodcanavoidcalculationerrorsandmeasuresmallersize-scaleporousmedium.Inthispapertheexperimentalporousmediumswerebrownsoil,kaolinandsandsoil.Amicro-orderofmagnitude(10^-5m)inparticle-sizeintervalcouldbeshowninPSDresultsofbrownsoilandkaolin.Theexperimentsindicatedthatbrownsoilhadanearlymono-fractalPSDcharacter,whilekaolinandsandsoilshowedmulti-fractalPSDcharacters.Bytheadsorptionisothermexperiments,thePSDfractaldimensionsofthesandsoilwerealsofoundtokeepalinearlyincreasingrelationwiththelinearadsorptiveparametersofthesoilsindifferentintervalstoadsorbbenzenefromaqueoussolution.
