摘要：

以磺胺嘧啶为目标污染物，考察厌氧生物对磺胺嘧啶的降解性能。结果表明，在25℃、pH为6.0、外加100 mg/L碳酸氢钠的条件下，微生物对20 mg/L磺胺嘧啶的降解率为99.7%，磺胺嘧啶的降解过程符合零级反应动力学特征。降解途径分析显示，厌氧生物通过3条平行途径降解磺胺嘧啶，将磺胺嘧啶逐渐转化为低毒和无毒的化合物，其中2-氨基-4-羟基嘧啶是主要降解产物。

关键词: 磺胺嘧啶, 厌氧, 生物降解

Abstract:

Choosing sulfadiazine as the target pollutant, the degradation performance of sulfadiazine by anaerobic organisms was investigated. The results showed that the degradation rate of sulfadiazine at 20 mg/L by microorganisms was 99.7% under the conditions of 25℃, pH=6.0, and 100 mg/L sodium bicarbonate. The degradation process of sulfadiazine met zero-order reaction kinetics. Analysis of degradation pathways showed that anaerobic organisms degrade sulfadiazine through three parallel pathways, the sulfadiazine was gradually transformed into low-toxic and nontoxic compounds, of which 2-amino-4-hydroxypyrimidine was main degradation product.

Key words: sulfadiazine, anaerobism, biodegradation

中图分类号: 

• X703