Research on anthracene absorption in Weihe River sediments

Experimental research on absorption of anthracene was carried out aiming at typical Weihe River sediments (clay, silt, fine sand, medium sand and coarse sand). The result shows that all absorption kinetic processes of anthracene absorption by various sediments in Weihe River are in accord with the second-order kinetic equation. The order of absorption rate is: coarse sand >;medium sand>;fine sand>;silt >;clay. Isothermal absorption research shows that isothermal absorption curve for absorption of anthracene in clay sediment is in accord with Henry equation and the same curves for silt, fine sand, medium sand and coarse sand sediments are in accord with both Henry equation and Freundich equation. At an initial anthracene concentration of 0.08-2.5 mg/L, absorption rate in clay sediment is from 98% to 99%. This paper aims at providing basic theoretical support to further research on relationship between polluted river and underground water.