Abstract：The adsorption layer of low elevation greenbelt in roadway of sponge city can purify the pollution in urban roadway stormwater effectively and manage the stormwater runoff at the same time. The adsorption characteristics of different adsorption material of adsorption layer for COD and heavy metals Pb, Zn, Cd, Ni were investigated by adsorption isothermal tests. The results indicate that the optimized mass ratio for coal-based activated carbon and steel slag is 9∶1. Adsorption kinetics test shows that the order of the time of adsorption equilibrium is Pb, COD, Ni, Zn, Cd. The pseudo-second-order equation provides the best correlation to the experimental data for all the contamination. The results of falling head-water-rising conductivity test show that the best mass ratio for sand, coal-based activated carbon and steel slag is 80∶18∶2, and the saturated permeability coefficient of adsorption layer filler with the degree of compaction of 90% is 1.60×10?6m/s, which meets the requirement.
尤星源 吴 建 杜延军 周实际. 下沉式绿地新型截污功能层材料对路面径流COD#br#
和重金属的吸附动力学研究[J]. 土木工程学报, 2019, 52(S2): 170-179.
You Xingyuan Wu Jian Du Yanjun Zhou Shiji. Dynamic adsorption study of COD and heavy metals of unban roadway stormwater pollutions with adsorption layer of low elevation greenbelt. 土木工程学报, 2019, 52(S2): 170-179.
