摘要
以o,o-二甲氧基或o,o-二乙氧基硫代磷酰氯废水为典型废水,在180—230℃,氧气压力为0.7—1.5MPa的反应条件下,在2L的不锈钢高压釜中,研究了农药废水中有机硫磷化合物在湿式空气氧化过程中的降解机制。实验结果表明,有机硫磷化合物分子中的有机硫通过氧化反应降解为硫酸,有机磷通过水解反应降解为磷酸。有机硫氧化生成的硫酸是废水湿式空气氧化过程中酸度增加的主要来源,酸性条件比碱性条件更利于有机硫磷化合物的湿式空气氧化降解。
The degradation mechanism of organic-phosphorus contaminants in the waste water from o,o-dimethyoxy-thiophosphoryl chloride production by wet air oxidation was investigated at 180-230℃ under oxygen partial pressure of 7-15 atm/cm2 in a 2L autoclave. It was found that there were twomain reactions in the process-oxidation of organic sulfure to sulfuricacid and hydrolysis of organic phosphorus to phosphoric acid. The increase of acidity during reaction was mainly due to the oxidation of organic sulfure and the hydrolysis of organic phosphorus compound was much faster in acidic condilion than in alkaline condition.
出处
《环境化学》
CAS
CSCD
北大核心
1993年第5期415-419,共5页
Environmental Chemistry
基金
"七.五"攻关课题
国家科委资助
关键词
农药
氧化
有机污染物
废水处理
Pesticides wastewaters, wet air oxidation, degradation mechanism .
