Mobility of Dissolved Organic Matter from the Suwannee River (Georgia, USA) in Sand-Packed Columns.

ABSTRACT: Transport of dissolved organic matter (DOM) from the Suwannee River and of synthetic polystyrene sulfonates (PSSs) was investigated in columns packed with naturally Fe/Al-oxide-coated sands from Oyster, Virginia. Surface-water samples were collected in May 2012 and processed by XAD-8 (humic substances; HPOA), XAD-4 (transphilic acids [TPIAs]), and reverse osmosis (broad range of components; NOM). Median transport time (R_o ) of PSSs increased with molecular weight (MW) from 1,000 to 8,000 Da but decreased for the largest PSS (18,000 Da), which is consistent with previous observations of MW effects on DOM adsorption and transport. Breakthrough curves (BTCs) of HPOAs and NOM were similar whereas TPIA transport was distinct; although all DOM samples had similar R_o

SUBMITTER: McInnis DP 

PROVIDER: S-EPMC4283060 | biostudies-literature | 2015 Jan

REPOSITORIES: biostudies-literature