光催化降解甲胺磷的研究  

Study on Photocatalytic Degradation of Methamidophos

作　　者：徐悦华[1] 王良焱[2] 古国榜[3] 

机构地区：[1]华南农业大学理学院,广州510642 [2]中科院广州能源研究所,广州510070 [3]华南理工大学理学院,广州510641

出　　处：《上海环境科学》2002年第9期574-576,共3页Shanghai Environmental Sciences

摘　　要：用离子色谱法检测光催化降解甲胺磷的最终产物PO43-、SO42-、NH4+、NO3-,它们随光照时间的生成量不同,80min时甲胺磷分子中的N原子已完全矿化为NH4+和NO3-,而P、S原子矿化为PO43-、SO42-则较慢且不同步,刚开始,SO42-生成量大于PO43-,100min后则PO43-生成量大于SO42-。经气相色谱及CODCr分析,均表明在甲胺磷光催化降解过程中存在中间产物,用气质联用仪(GC—MS)检测出中间产物CH3-SO2-SCH3及CH3S—SCH3,提出光催化降解甲胺磷的可能途径。The products PO43-,SO42-,NH4+,NO3- photocatalytic degradation of methamidophos were detected by chro-matography. After methamidophos was degraded 80 minutes, N atom of methamidophos was totally mineralized into NH4- and NO3-, P and S atom were mineralized into PO43- and SO42- respectively more slowly, at first the amount of SO42- was greater than that of PO43-, but the amount of PO43- was greater than that of SO42- after 80 minutes. GC and CODCr analysis showed that some intermediates formed during photo-catalytic degradation of methamidophos. CH3-S-SCH3 And CH3S-SCH3 were inspected by GC-MS, and the possible pathway of photocatalytic degradation of methamidophos was proposed.

关 键 词：光催化降解 甲胺磷 降解机理 农药 废水处理 

分 类 号：X786[环境科学与工程—环境工程] X592