摘要
在实验室中,采用摇床试验,在保证缺氧的条件下,研究了含氮杂环化合物吡啶缺氧反硝化降解过程中,硝酸还原酶的适宜作用条件、吡啶降解过程中硝酸还原酶活性变化情况及吡啶和硝态氮等的降解情况。结果表明,C/N对吡啶缺氧反硝化降解具有重要意义,pH和温度均对硝酸还原酶活性具有一定影响。硝酸还原酶的适宜作用条件为:温度25～30℃,pH7.5。吡啶降解过程中,硝酸还原酶活性由低到高逐渐提高,最后达到一个相对稳定的数值。在适宜的碳氮比条件下,吡啶起始浓度越高,硝酸还原酶最后稳定活性越高。
Experiments were conducted to study the suitable conditions for nitrate reductase and nitrate reductase activity (NRA) during degradation of py-ridine under anoxic conditions. The results showed that under the conditions of 25 - 30℃ and pH 7.5, the nitrate reductase activity was in best state. NRA gradually increased and finally reached to a relative steady value during degradation of pyri-dine. When the ratio of carbon to nitrogen was in a suitable value, with increasing of pyridine initial concentration, the steady - activity value of NRA beacame larger.
出处
《上海环境科学》
CAS
CSSCI
CSCD
北大核心
2003年第12期898-902,共5页
Shanghai Environmental Sciences
基金
国家自然科学基金
编号50108009
上海市重点学科资助项目
关键词
吡啶
含氮杂环化合物
缺氧反硝化
硝酸还原酶活性
废水
Pyridine Nitrogenous heterocyclic compound Anoxic denitrification Nitrate reductase activity
