KINETICS OF ZINC SORPTION BY SOME CALCAREOUS SOILS OF IRAN

摘要: The kinetics of Zn sorption by ten calcareous soils Iran were measured and fitted to several equations (zero-, first-, second-, third-order, parabolic diffusion, simple Elovich, exponential equations). Two initial concentrations zinc i.e. 20 80 mg l -1 used observations carried out for 100 hours. time required reach the near equilibrium state was about 24 hours, which most in solution had been sorbed. Zero-order, third-order did not adequately describe kinetics. Both Elovich data. Regression analysis indicated that total CaCO 3, active clay content, specific surface area closely related coefficients these two equations. magnitude positively soil properties. Thus, can be predicted from data collected during routine evaluation.