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Effects of NH4+ concentration, solution/soil ratio and temperature on NH4+ adsorption were studied in a Eum-Orthic Anthrosol. The slopes of the soil NH4+ adsorption isotherms and the fitted n, the coefficient for the adsorption intensity, and k, the coefficient related to adsorption capacity, of the Freundlich equation increased with increasing solution/soil ratio (SSR) and with decreasing temperature (T). For the range of experimental conditions, the value of (?)q/(?)c, the rate of change of the amount of NH4+ adsorbed in the soil solid phase (q) with respect to the equilibrium concentration of NH4+ in soil solution (c), was 0.840, indicating that q increased with increasing c. From 2 to 45℃, (?)q/(?)SSR, the rate of change of q with respect to SSR, decreased from 2.598 to 1.996, showing that q increased with increasing SSR, while its increasing rate decreased with temperature. From SSR 1:1 to 20:1,(?)q/(?)T, the rate of change of q with respect to T, decreased from -0.095 to -0.361, indicating that q
Effects of NH4 + concentration, solution / soil ratio and temperature on NH4 + adsorption were studied in a Eum-Orthic Anthrosol. The slopes of the soil NH4 + adsorption isotherms and the fitted n, the coefficient for the adsorption intensity, and k, the coefficient related to For the range of experimental conditions, the value of (?) q / (?) c, the rate of change of the amount of NH4 + adsorbed in the soil solid phase (q) with respect to the equilibrium concentration of NH4 + in soil solution (c), was 0.840, indicating that increased with increasing c. From 2 to 45 ° C, (?) q / (?) SSR, the rate of change of q with respect to SSR, decreased from 2.598 to 1.996, showing that q increased with increasing SSR, while its increasing rate decreased with temperature. From SSR 1: 1 to 20: 1, (? ) q / (?) T, the rate of change of q with respect to T, decreased from -0.095 to -0.361 , indicating that q