Biochar enhances the sorption and degradation of fluridone and its main metabolite in soil: insights into biodegradation potential and remediation of microbial communities

作者：Chi Wu, Yuzhu Wang, Jihong Liu Clarke, Hang Su, Liang Wang, Olga A. Glazunova, Konstantin V. Moiseenko, Lan Zhang, Liangang Mao, Lizhen Zhu, Xingang Liu · 发表于：Biochar · 年份：2025 · DOI：10.1007/s42773-025-00469-9 · 被引用次数：6 · 研究领域：Pharmaceutical and Antibiotic Environmental Impacts、Chemical Analysis and Environmental Impact、Analytical chemistry methods development

Abstract Owing to wide application and persistence, fluridone has demonstrated side-effects on non-target plants and aquatic organisms. This study investigated the potential of biochar as remediation in soil using rice hull biochar (BCR) produced at different temperatures and in four types of soil. The results indicated that, with increasing pyrolytic temperature from 300 to 700 ºC, biochar properties changed, for example, specific surface area values increased from 38.21 to 126.12 m 2 g −1 . Sorption affinity (K f ) of BCR ranged from 409 to 1352 and 1301 to 6666 (μg/g)/(mg/L) n for fluridone and its metabolite fluridone acid respectively. After amendment with 2% BCR500, fluridone and fluridone acid could easily be adsorbed in different types of soils, and K f values were 1.30–3.73 times higher than those in pure soil. Half-lives values varied between different soils and fluridone acid (179–306 days) persisted significantly longer than fluridone (39–179 days) in soil. After amendment with 2% BCR500, fluridone and fluridone acid were degraded faster. Experiments under sterilized conditions demonstrated biodegradation to be the dominant process in unamended (61.59%–64.70%) and amended (67.71%–77.67%) soil. Bioinformatic analysis showed that fluridone reduced the diversity of the soil microbial community, but the abundance of microorganisms with degradation function increased and these became dominant species after BCR was added, particularly with higher numbers of degrading ba...