Response surface methodology and Box-Behnken design optimization of Sulfaquinoxaline removal efficiency and degradation mechanisms by Bacillus sp. strain DLY-11

文献类型： 外文期刊

第一作者： Chen, Chunyan

作者： Chen, Chunyan;Luo, Zifeng;Tu, Hongxing;Lin, Xiaojun;Wang, Xiujuan;Cai, Qianyi;Zeng, Jingwen;Qiu, Jinrong;Luo, Zifeng;Tu, Hongxing;Lin, Xiaojun;Wang, Xiujuan;Cai, Qianyi;Zeng, Jingwen;Qiu, Jinrong;Pang, Yuwan;Huang, Jianfeng;Wei, Zebin;Zhang, Jun

作者机构：

关键词： Sulfaquinoxaline (SQ); Bacillus sp. strain DLY-11; Response surface methodology; Degradation condition optimization; Degradation mechanisms

期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 影响因子：11.3； 五年影响因子：12.4 ）

ISSN： 0304-3894

年卷期： 2025 年 486 卷

页码：

收录情况： SCI

摘要： Antibiotic pollution, particularly the persistence of Sulfaquinoxaline (SQ) residues in livestock and poultry farming environments, has emerged as a pressing environmental concern. Despite this, there remains a limited understanding of the optimized conditions and mechanisms for the efficient degradation of SQ by microorganisms. To address this knowledge gap, we isolated Bacillus sp. strain DLY-11 from aerobically composted manure, which exhibits exceptional SQ degradation capability. Using response surface methodology and Box-Behnken design, we optimized the conditions: 5 % inoculum, 60 degrees C, pH 8.02, and 0.5 g/L MgSO4. Strain DLY-11 achieved 95.5 % SQ degradation in 2 d. We identified 12 degradation products, including one newly reported, and proposed four degradation pathways involving S-N and C-N bond cleavage, hydroxylation, SO2 release, deamination, oxidation, acetylation, and formylation. One of the proposed pathways is entirely new and has not been

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