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
作者： Chen, Chunyan 1 ; Luo, Zifeng 2 ; Tu, Hongxing 2 ; Lin, Xiaojun 2 ; Pang, Yuwan 4 ; Huang, Jianfeng 4 ; Zhang, Jun 6 ; Wang, Xiujuan 2 ; Cai, Qianyi 2 ; Wei, Zebin 5 ; Zeng, Jingwen 2 ; Qiu, Jinrong 2 ;
作者机构： 1.Jinan Univ, Guangzhou 511443, Peoples R China
2.South China Inst Environm Sci MEE, Guangzhou 510655, Guangdong, Peoples R China
3.State Environm Protect Key Lab Water Environm Simu, Guangzhou 510655, Guangdong, Peoples R China
4.Guangdong Acad Agr Sci, Inst Agr Resources & Environm, Guangzhou 510640, Peoples R China
5.South China Agr Univ, Coll Nat Resources & Environm, Guangzhou 510642, Peoples R China
6.Zhejiang Lishui Ecol & Environm Monitoring Ctr, Lishui 323000, Zhejiang, Peoples R China
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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