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oai:figshare.com:article/34021076 2026-09-29T04:06:11Z category_4 category_146 category_8 category_21 category_272 category_873 category_39 category_734 category_69 category_106 portal_63 item_type_6 month_year_09_2026

Biochar-Mediated Transport of Escherichia coli in Aggregated Porous Media and a Soil-Lettuce Pot System Hongjuan Bai (9260661) Xiangwei Yang (9659375) Junhang Chen (9260664) Haoran Sheng (21298548) Mengyang Wang (8190564) Zijun Yang (5618831) Qiaofei Zhang (3047415) Biochemistry Space Science Microbiology Biotechnology Environmental Sciences not elsewhere classified Chemical Sciences not elsewhere classified Ecology Biological Sciences not elsewhere classified Inorganic Chemistry Science Policy modifying surface charge mitigating microbial contamination including quartz sand tested porous media heterogeneous porous media aggregated porous media studying bacterial transport 2 wt %, coli retention behavior porous media biochar altered e 2 wt transport behavior 10 wt transport response transport parameters mediated transport study investigates risk assessment results showed region mobile pore structure mass balance iron oxide immobile model common indicator column experiments coli transport breakthrough curves analyzed using Owing to its detectability, Escherichia coli (E. coli) is a common indicator for studying bacterial transport, and understanding its migration in porous media is critical for risk assessment and mitigation. This study investigates how biochar influences the transport behavior of E. coli in heterogeneous porous media, including quartz sand, gravel, and iron oxide-coated gravel. Column experiments were conducted with PSBC at 0, 2 wt %, and 10 wt % in the tested porous media, whereas AWBC was evaluated only at 2 wt % in gravel and iron oxide-coated gravel. Breakthrough curves, mass balance, and transport parameters were analyzed using a two-region mobile-immobile model. The results showed that PSBC concentration affected E. coli transport in a medium-dependent manner. At 2 wt %, PSBC and AWBC exhibited different effects in gravel and iron oxide-coated gravel. Notably, the effect of iron oxide-coated gravel on biochar-mediated E. coli transport was biochar-dependent: it altered the transport response of PSBC, but not AWBC, in the same way. Overall, biochar altered E. coli retention behavior by modifying surface charge and pore structure, highlighting its potential for mitigating microbial contamination in groundwater and soil systems. 2026-09-29T00:00:00Z Text Journal contribution 10.1021/acs.iecr.6c03819.s001 https://figshare.com/articles/journal_contribution/Biochar-Mediated_Transport_of_Escherichia_coli_in_Aggregated_Porous_Media_and_a_Soil-Lettuce_Pot_System/34021076 CC BY-NC 4.0