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→How is it being used?
===How is it being used?===
===How is it being used?===
A bioretention system in China used biochar layered with or mixed into lateritic red soil, with some success in contaminant removal. The mixed biochar–soil design achieved the highest water retention, and both biochar-amended systems removed more contaminants (TN, NH₃-N, NO₃⁻, TP, PO₄³⁻, and Cu) than systems without biochar <ref>Premarathna, K. S. D., Biswas, J. K., Kumar, M., Varjani, S., Mickan, B., Show, P. L., Lau, S. Y., Novo, L. A. B.,
A bioretention system in China used biochar layered with or mixed into lateritic red soil, with some success in contaminant removal. The mixed biochar–soil design achieved the highest water retention, and both biochar-amended systems removed more contaminants (TN, NH₃-N, NO₃⁻, TP, PO₄³⁻, and Cu) than systems without biochar <ref>Premarathna, K. S. D., Biswas, J. K., Kumar, M., Varjani, S., Mickan, B., Show, P. L., Lau, S. Y., Novo, L. A. B.,
& Vithanage, M. (2023). Biofilters and bioretention systems: the role of biochar in the blue-green city concept for
& Vithanage, M. 2023. Biofilters and bioretention systems: the role of biochar in the blue-green city concept for
stormwater management. Environmental Science: Water Research and Technology, 9(12), 3103-3119. Advance
stormwater management. Environmental Science: Water Research and Technology, 9(12), 3103-3119. Advance
online publication. https://doi.org/10.1039/d3ew00054k
online publication. https://doi.org/10.1039/d3ew00054k