Degradation Kinetics of Manure-Derived Sulfadimethoxine in Amended Soil

• DOI: 10.1021/jf052216w
• Publication Date: 2006-01-04T05:47:22Z
• Authors: Qiquan Wang; Mingxin Guo; Scott R. Yates
• Keywords: Sulfadimethoxine; Degradation

Spreading of contaminated manure into agricultural lands as fertilizer is one the major routes through which veterinary antibiotics enter environment. In this study, degradation manure-derived sulfadimethoxine, a widely used sulfonamide antibiotic, in manure-amended soil was investigated. A kinetic model, called availability-adjusted first-order model based on kinetics and an assumption availability target compound during process, developed found to fit sulfadimethoxine well. The effect initial concentration showed that rate constant increased with decreasing concentration, indicating bioactivity degrading microorganisms sensitive concentration. Sulfadimethoxine accelerated increasing content amended soil. Degradation nonamended significantly slower than This indicated may become more persistent once it reaches after leaching from storage for certain period before application needed diminish contamination. effectively enhanced moisture No adverse observed