Abstract
The adsorption of organic pollutants by soil has an important impact on their migration, transformation and bioavailability. Black soil is rich in organic matter that plays an essential role in adsorption, which indicates that black soil may have a high adsorption capacity for DBP. The significant DBP adsorption capacity of black soil was discovered through research into the adsorption kinetics and thermodynamic properties of DBP in black soil. This finding was consistent with pseudo-second-order kinetics. The adsorption was chemical adsorption, and intramolecular diffusion was a critical control step in the adsorption process. The adsorption equilibrium time was 24 h. Analyzing the effects of temperature, pH, ionic strength and other conditions, it was found that reducing the temperature promoted the adsorption of DBP. When the pH was 7, the adsorption capacity was the greatest. The capacity of DBP to adsorb was boosted by the rise in ionic strength, which also hindered DBP adsorption once it reached a certain threshold.
Published Version
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