摘要
以阳离子表面活性剂十六烷基三甲基溴化铵(CTAB)为研究对象,考查了水环境下光源、溶液介质、重金属离子和光敏剂等因子对CTAB光化学降解行为的影响。结果表明:1)CTAB在紫外光照射下降解率最大,20 min时的降解率为37.02%,自然光下其次,黑暗中基本不发生降解;2)20 min时CTAB在去离子水中的降解率为31.49%,比在人工海水(19.04%)中的快。3)不同重金属离子对CTAB光降解反应的影响不同,在去离子水中分别加入0.1 mg/L的Zn2+和0.1 mg/L的Cu2+,20 min时CTAB的降解率分别为29.33%和24.54%;4)光敏剂对CTAB的光降解反应有促进作用,在去离子水和人工海水中分别加入0.1 mg/L的丙酮,20 min后CTAB的降解率分别为36.92%和22.54%。该结果可为环境中阳离子表面活性剂的有效治理提供参考。
The effects of light,solution medium,heavy metal ions,and typical photosensitizer under aquatic environment on the photo-degradation of cetyltrimethylammonium bromide（CTAB）,which was selected as the typical cationic surfactant,were investigated.The results showed that：1） The degradation rate of CTAB under the UV light was the fastest compared to the rate under natural light and dark conditions,its degradability is 37.02% after 20 min,and almost no reaction in the dark.2） The degradability of CTAB in de-ionized water（31.49%） was faster than that of the artificial sea water（19.04%）.3） Different heavy metal ions have different effects on the degradation of CTAB.The degradability of CTAB was 29.33% and 24.54% after 20 min photo-degradation under the condition of 0.1 mg/L Zn2＋ and Cu2＋,respectively.4） The degradability of CTAB was 36.92% and 22.54% after 20 min,when 0.1 mg/L acetone was chosen as the photosensitizer in de-ionized water and artificial seawater medium,respectively.The results may be used as effective reference for the aquatic management of the cationic surfactants.
出处
《农药学学报》
CAS
CSCD
北大核心
2012年第2期229-232,共4页
Chinese Journal of Pesticide Science
基金
浙江省人力社会资源保障课题(R2011B032)
浙江工业大学"海洋规划与管理"优秀课程建设(YX1002)
浙江工业大学"理工复合型海洋人才培养的研究与实践"人才培养改革项目(MS1101)
浙江省"化学工程与新材料研究生教育创新示范基地"项目
关键词
十六烷基三甲基溴化铵
光降解
溶液介质
重金属离子
光敏剂
cetyltrimethylammonium bromide
photo degradation
solution medium
heavy metal
photosensitizer
