Study on the adsorption behavior of diesel oil in groundwater by soils with different physicochemical properties
The static adsorption experiment was conducted to study the adsorption behavior of diesel oil in water by soil with different physicochemical properties.The results showed that the adsorption kinetics of diesel oil on soils with different physical and chemical properties could reach equilibrium within 24 h.The quasi-second-order kinetic model(R2was 0.92-1.00)could better describe the adsorption kinetics of diesel oil on soils.The adsorption process was dominated by chemical adsorption.The adsorption isotherm was consistent with the Langmuir isotherm adsorption model,indicating that the adsorption of diesel oil on soil was monolayer adsorption,which was similar to irreversible adsorption.The amount of diesel oil adsorbed by oil polluted soil was less than that by unpolluted forest soil.The amount of diesel oil adsorbed by soil in water was positively correlated with the content of organic matter,and gradually increased with the decrease of soil particle size and pH.
万方数据
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