Bioretention cell incorporating Fe-biochar and saturated zones for enhanced stormwater runoff treatment

Chemosphere
Jiaqing XiongMawuli Dzakpasu

Abstract

Nitrogen (N) and phosphorus (P) removal in conventional bioretention systems is highly variable. Therefore, five novel experimental columns with different media configurations and constituents, and incorporating a saturated zone were developed and assessed to optimize the removal of N, P and other nutrients. Three types of media composed of the conventional mixed sand and soil media (T1), biochar-amended media (T2), and iron-coated biochar (ICB)-amended media (T3) were evaluated. Two of the experimental columns were designed with double-layer configurations, while the other three were of a single-layer structure. Removal efficiencies of nutrients in the experimental columns were evaluated and compared using simulated runoff. Also, the effect of media depth on the retention of P and denitrifying enzyme activity (DEA) in the bioretention columns were evaluated. The experimental column only filled with T3 showed the best performance for COD, ammonia (NH4+-N) and total phosphorus (TP) removal (94.6%, 98.3% and 93.70%, respectively), whereas columns filled with T2 performed poorly for TP removal (57.36%). For the removal of nitrate (NO3--N) and total nitrogen (TN), the columns using a single-layer and only filled with either T3 or T...Continue Reading

Citations

Jul 15, 2020·Water Environment Research : a Research Publication of the Water Environment Federation·Carolyn M RodakJason R Vogel
Jan 15, 2021·Environmental Science and Pollution Research International·Hongwei ZhangHua Zhong
Jun 21, 2020·The Science of the Total Environment·Wen JiaLiuyan Yang
Apr 4, 2021·International Journal of Environmental Research and Public Health·Wen Jia, Liuyan Yang
Oct 9, 2020·Chemosphere·Md Sazadul HasanVenkataramana Gadhamshetty
May 14, 2021·Journal of Environmental Management·Kuppusamy VijayaraghavanRajasekhar Balasubramanian
Jun 24, 2020·The Science of the Total Environment·Linyuan LengGuangtao Fu
Aug 23, 2021·Journal of Hazardous Materials·Basanta Kumar BiswalRajasekhar Balasubramanian
Sep 7, 2021·Critical Reviews in Biotechnology·Basanta Kumar BiswalRajasekhar Balasubramanian

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