数字农科院2.0

Thermally treated gentamicin-activated carbon improved the soil properties without triggering resistance risk

文献类型： 外文期刊

作者： Dong Wang;Yu Liu;Xinyuan Wei;Yulong Shi;Chang Ma;Qingwen Zhang

作者机构：

关键词： Antibiotic resistance genes;Gentamicin-activated carbon;Land application;Soil properties

期刊名称： Process Safety and Environmental Protection

ISSN： 0957-5820

年卷期： 2025 年 203 卷

页码：

收录情况： SCIE（2025版） ; ; EI（2025版）

摘要： Massive amounts of gentamicin-activated carbon (GAC) waste were generated during the purification process of gentamicin, posing dual environmental risks of residual gentamicin contamination and loss of valuable carbon resources. Despite thermally treated gentamicin-activated carbon (TGAC) could effectively degrade antibiotics in GAC and shows potential as a soil amendment, critical gaps remain in understanding its dual impacts on soil fertility enhancement and resistance risk mitigation. This study addresses these critical gaps by systematically evaluating the effects of TGAC on soil physicochemical properties, enzyme activities, and antibiotic resistance genes (ARGs) dynamics. The results demonstrated that TGAC significantly improves soil fertility and enzyme activities. The gentamicin introduced by TGAC could be rapidly degraded in soil within 7 days, and the relative abundance of Tn916/1545, AAC(6′)-Ie-APH(2'')-Ia, armA, APH(3′)-VI, and ANT(4′)-Ia returning to the soil background level at the 90 days, indicating a reduced risk of antimicrobial resistance. TGAC reshaped the microbial community structure, and Proteobacteria were identified as the primary hosts of ARGs. This work pioneers a paradigm shift in activated carbon-containing antibiotic waste management by demonstrating that thermally treated biochar can simultaneously achieve soil fertility improvement and resistance risk mitigation. The findings provide actionable insights for developing circular economy strategies in the antibiotic manufacturing industries.

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