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Optimized Filtrations for Stormwater Quality Improvement by Porous Media–Biochar Applications: Column Experiments and Inverse Modeling

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Julkaisussa:Water vol. 17, no. 9 (2025), p. 1372
Päätekijä: Amin, Preota Sumiaya
Muut tekijät: Chu-Lin, Cheng, Hwangbo Myung, Kim Jongsun
Julkaistu:
MDPI AG
Aiheet:
Water quality
Artificial wetlands
Perfluoroalkyl & polyfluoroalkyl substances
Experiments
Carbon
Temperature
Adsorption
Developing countries > LDCs
Biomass
Ammonia
Packaging
Hydraulics
Stormwater
Aquifers
Parameter estimation
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Abstrakti:Stormwater reuse plays a critical role under changing climates and increasing water demands. This study investigates the removal efficacy of lead (Pb2+) and ammonia (NH3) using sand and rice husk (RH) biochar for potential stormwater quality improvements and treatments. Column experiments combined with HYDRUS inverse modeling were conducted to optimize adsorption isotherms from breakthrough curves. Among linear and non-linear models, the Langmuir and Freundlich models performed better for sand and biochar, respectively. RH biochar showed much higher adsorption capacity of both Pb2+ (4.813 mg/g) and NH3 (6.188 mg/g). In contrast, sand showed a relatively limited adsorption capacity for Pb2+ (0.118 mg/g) and NH3 (0.104 mg/g). This can be contributed to higher pore size distribution, surface area, and the presence of different functional groups of biochar. The optimized adsorption coefficients and adsorption capacity parameters of sand and RH biochar by inverse modeling provided useful input for improving field designs. These findings will enhance the development of the best management practices (BMPs) for managing heavy metal and solute pollution in groundwater or stormwater low-impact development (LID) infrastructure systems.
ISSN:2073-4441
DOI:10.3390/w17091372
Lähde:Publicly Available Content Database