TY - JOUR TI - Isothermal adsorption experiment of nitrate nitrogen in bioretention media AU - Mei Ying AU - Xu Jun-Ya AU - Jia Pei-Qi AU - Zhu Xiao-Han AU - Liu Yu-Qi AU - Zhang Jian-Qi AU - Zhou Hang AU - Xiang Ya-Jun AU - Chang Ying AU - Bao Jun-Jiang JN - Thermal Science PY - 2021 VL - 25 IS - 3 SP - 2269 EP - 2278 PT - Article AB - Bioretentions can remarkably improve the rainwater quality. Though iron and aluminum as fillers in bioretentions can remove nitrate nitrogen, its adsorption mechanism is not clear yet and was rarely studied. This paper takes sand, iron powder, and aluminum powder as the research objects to study the adsorption characteristics of nitrate nitrogen in the bioretention with different pH values and different ionic strength. The results show that aluminum powder has the highest the adsorption capacity. Langmuir adsorption isotherm equation and the quasi-secondary kinetic model are adopted to analyze the experimental data.