ABSTRACT
T im e -d e p en d e n t p h ase d is trib u tio n re la tio n sh ip s fo r so rp tio n o f T C B on C h e lsea so il a re illu s tra te d in F ig u re 4. T h e P D R is s lig h tly m o re lin ea r fo r th e 1 -day c o n tac t tim e (n = 0 .8 6 ) as co m p ared to th e 7 -d ay o r 14-day P D R s (n ~ 0 .80 ). M o reo v e r, Kf, th e so rp tio n cap ac ity o f C h e lse a so il fo r T C B , in c rease s fro m 0 .093 (p g /g ) /(L /p g )n to 0 .295 (p g /g ) /(L /p g )n fro m d ay 1 to d ay 7. T he P D R d o e sn ’t ap p e a r to ch an g e s ig n ifican tly fro m d ay 7 to day 14. A m o re lin e a r P D R fo r d ay 1 im p lies so lu te so rp tio n to m in e ra ls an d th e am o rp h o u s o rg an ic m a tte r d o m ain as illu s tra te d sch em a tica lly in F ig u re 1. T h e s tab iliza tio n o f n b y d ay 7 in d ica tes th a t th e so lu te m o lecu les h av e accessed all en e rg e tica lly h e te ro g en e o u s so rb en t d o m a in s (7). B ey o n d th is , Kf c o n tin u es to in c re a se s lo w ly a s th e so lu te co n tin u es to “p en e tra te” in to th e co n d en sed o rg an ic m a tte r d o m ain an d th e so rp tio n p ro ce ss p ro ce ed s to w a rd s tru e th e rm o d y n am ic eq u ilib riu m .
