Batch equilibrium experiments(OECD Guideline 106)were conducted to study therm odynamics and kinetics of norfloxacin(NOR)adsorption in four kinds of soils,namely Ustic Cambosols collected from Fengqiu of Henan, Ali-Perudic Ferrosols collected from Yingtan of Jiangxi, Gleyic-Stagnic Anthrosols collected from Changshu and Udic Argosols collected from Nanjing of Jiangsu.Results show that mechanism of NOR sorption in the four tested soils is controlled to a certain extent by pH of soil solution.With rising temperature(-88K,-98K and 308K),Fruendlich coefficients(K_f) of NOR sorption decreased in all the four soils and the change in enthalpy(v Hb)was significant at low soil pH and relatively slight at high soil pH,which was coincident with the results obtained from the four soils with pH adjusted with sodium hydroxide or hydrochloric acid solution.Forces of NOR sorption in the four soils varied greatlywith pH,so that different sorption behaviors were observed.At low pH(5.20~6.14),ion exchange and hydrogen bond predominated NOR sorption process;while at high pH(7.78~8.20),weaker Vander waals interaction and Hydrophobic bond were the control factors.Moreover,NOR sorption in the soils reached equilibrium quickly and the kinetics of NOR adsorption was best described by Elovich model and two-constant equation.