文献类型：期刊文献

英文题名：Positive roles and mechanisms of sea rice straw biochar in accelerating sulfamethoxazole biodegradation in coastal saline soils

作者：Lin, Zhong[1]; Li, Huijun[2]; Chen, Yijie[2]; Luo, Shuwen[2]; Wu, Xuebiao[3]; Ma, Zhiyu[3]; Liang, Yan-Qiu[1]; Zhen, Zhen[2]; Zhang, Dayi[4,5,6]

机构：[1] Faculty of Chemistry and Environmental Science, Guangdong Ocean University, Zhanjiang, 524088, China; [2] College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang, 524088, China; [3] School of Management, Guangdong Ocean University, Zhanjiang, 524088, China; [4] Key Laboratory of Groundwater Resources and Environment [Jilin University], Ministry of Education, Changchun, 130021, China; [5] College of New Energy and Environment, Jilin University, Changchun, 130021, China; [6] Key Laboratory of Regional Environment and Eco-restoration, Ministry of Education, Shenyang University, Shenyang, 110044, China

年份：2026

卷号：532

外文期刊名：Chemical Engineering Journal

收录：EI(收录号：20260920186599)

语种：英文

外文关键词：Antibiotics - Biodegradation - Genes - Hydrolysis - Metabolites - Physiology - Soil pollution - Soil quality

外文摘要：Sulfamethoxazole is an emerging contaminant that is highly persistent and threatens human health; nevertheless, there are limited studies on the fate of sulfamethoxazole in coastal saline soils. Our study investigated the performance and mechanisms of sea rice straw biochar in accelerating sulfamethoxazole biodegradation in coastal saline soils by studying the changes in sulfamethoxazole metabolites, soil microenvironment, sulfamethoxazole degradation-related genes and microbial communities. Sea rice straw biochar amendment significantly improved soil quality and reduced salt stress, and 2% dosage achieved the best degradation performance (nearly 100%) in 50 days. Besides the increasing soil organic matter, humus, and dehydrogenase activities, sea rice straw biochar supplement also enriched autochthonous genera of Microvirga, Nocardioides, Micromonospora, Marmoricola, Roseisolibacter and Ramlibacter. Sulfamethoxazole metabolism followed both hydroxylation and hydrolysis pathways, and biochar amendment preferentially accelerated hydrolysis pathway. Particularly, key genes in acetyl-CoA pathway (oah, had, fadA, fadJ, GCDH, paaF and paaH) were elevated in biochar-supplemented treatments, explaining the accelerated sulfamethoxazole degradation and evidencing the shift of sulfamethoxazole downstream metabolism from the benzoate pathway toward the acetyl-CoA route, ultimately enhancing the biodegradation efficiency. Our findings provided deep insights into biochar-assisted sulfamethoxazole biodegradation in coastal saline soils and offered clues for effective agricultural land management to prevent antibiotic contamination. ? 2026 Elsevier B.V.