TY - JOUR
TI - Studies on the transport and transformation of nitrate nitrogen in bioretention
AU - Mei Ying
AU - Gao Yuying
AU - Xu Junya
AU - Yun Feng
AU - Sun Dongxu
AU - Jing Yanyan
JN - Thermal Science
PY - 2026
VL - 30
IS - 2
SP - 1067
EP - 1075
PT - Article
AB - Bioretentions represent a prevalent stormwater runoff management technique in  urban areas, frequently employed to address the treatment of pollutants in  runoff. However, the efficacy of nitrate-nitrogen removal by bioretention  systems is subject to variation due to a multitude of environmental  factors. In this study, three bioretentions (B1, B2, and B3) were  constructed to investigate the migration and transformation characteristics  of nitrate nitrogen in bioretentions under different soil mediums (sandy  soil, sandy soil + newspaper, and sandy soil + wood chips). The findings  indicated that the efficacy of nitrate nitrogen removal varied with  different media types, with sandy soil augmented by wood chips demonstrating  the optimal removal performance, followed by sandy soil combined with  newspaper, and sandy soil alone exhibiting the least efficient removal. The  B3 plant retention system demonstrated the optimal removal efficacy among  the three mediums examined. The B2 medium exhibited a secondary level of  effectiveness, while the B1 medium exhibited the least efficient removal  capacity. With an increase in hydraulic retention time, there was a  corresponding increase in the removal rate of the three bioretentions, but a  concomitant decrease in the removal rate. The addition of carbon source,  whether it be newspaper or wood chips, led to the swift activation of the  phytoretention system, thereby enhancing the rate of nitrate nitrogen  removal over a brief period.
DO - 10.2298/TSCI2602067M
ER -