| Media is one of the key factors fortreatment performanceof the constructed wetland. Forsterite and furnace slag were used to compare the characteristics of phosphorous adsorption. Results of batch test showed that the phosphorus adsorption process of both forsterite and furnace slag fitted with the Langmuir isothermal adsorption equation very well, and their saturation adsorption capacities were 161.29 mg·kg-1 and 666.67 mg·kg-1, respectively. The pseudo second-order rate equation could fit the experimental data of forsterite and furnace slag well（R2 were 0.982 1 and 0.983 4, respectively）, and the phosphorus desorption from both forsterite and furnace slag was low. At the column height of 600 mm and hydraulic loading rate（HLR） of 0.8 m3·（m2·d）-1, results of dynamic adsorption test showed that both the forsterite packed column and furnace slag packed column had significant performance of phosphorous removal, i.e., 77.4% and 87.8% of the average removal rates, respectively. All these results clearly showed that both forsterite and furnace slag were suitable as media of the constructed wetland for phosphorus removal. |
