Adsorption Behavior Of Trichloroethylene On Natural Soils And Relevant Influencing Factors

Trichloroethylene (TCE) is one of the organic solvent, widely used in industry. However, with its large-scale application, the soil and groundwater was polluted seriously, which became ubiquitous environmental problem. Thus, this paper studied the sorption behaviors of TCE on natural soils, in order to forecast their environmental behavior and latency harm. The influencing factors were also discussed.The adsorptive dynamics results showed that: the time of equilibrium adsorption of TCE by natural soils had no obvious connection with weight of soil. The adsorption of TCE on natural soils could be divided into four stages: rapid-adsorption, slow-down adsorption, slow-speed adsorption and equilibrium adsorption. When the adsorptive system was shaken for over 40 hours, the sorption rate didn't grow up and the concentration of solid and liquid phase almost kept stable, which revealed equilibrium was achieved. Consequently, the time of equilibrium adsorption was fixed for 42 hours.The research on adsorptive isotherms of TCE pointed out that adsorptive behavior of the TCE tallied with the linear equation, and the correlation coefficient reached over 0.99.The minerals in soils adsorbed no or little TCE, while the organic matters were the most contributor.Consiquently, the adsorption of TCE by natural soils was...