title: Effect of sample pretreatment on sorption of acetophenone by soils and sediments.
abstract: The effect of several sample pretreatment storage techniques, the effect of degree of grinding, and the effect or organic matter removal on the sorption of acetophenone was examined. No significant difference in the sorption of acetopheonone was observed when air-dried, freeze-dried, oven-dried, frozen, or samples kept at 2 degrees C (fresh) were compared. All pretreatment storage techniques resulted in linear sorption isotherms and gave good fits to the modified Freundlich equation (Cs = Kp . Cw). No significant differences in sorption constants (Kp) were observed for samples with a 2 mm maximum diameter when compared to samples ground to 0.6 mm maximum diameter or 0.25 mm maximum diameter. Organic matter removal resulted in decreased Kp values for samples containing more than 1% organic carbon initially but increased Kp values for samples containing less than 1% organic carbon before removal. Expandable 2:1 clay mineral content was significantly correlated with adsorption of acetophenone after organic matter removal.
mesh_terms: D000098:Acetophenones; D002244:Carbon; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D005612:Freeze Drying; D005615:Freezing; D006358:Hot Temperature; D010316:Particle Size; D012987:Soil; D013048:Specimen Handling
chemical_list: D000098:Acetophenones; D012987:Soil; D002244:Carbon