摘要
以两种典型内分泌干扰物(ECDs)——壬基酚(NP)和17α-乙炔基雌二醇(EE2)为目标物,运用GC/MS检测方法,对其在臭氧、臭氧/过氧化氢、臭氧/超声三种工艺中的去除特性进行了研究,并初步研究了臭氧降解的反应动力学。结果表明:联合工艺显著提高了目标物的去除效率,NP和EE2的去除率分别提高9.6%～17.7%和14.6%～23.4%。目标物去除率随臭氧投加量和pH值的增大而增大;随H2O2/O3摩尔比的增加先增大后减小,摩尔比为0.6时,去除率均达到最大;超声强化了臭氧氧化效率,但超声(US)强度(60～240 W)的变化对联合工艺去除目标物效果影响不明显。臭氧氧化两种目标物都遵循假一级反应动力学,碱性条件下的反应速率常数要大于酸性及加入叔丁醇条件下的反应速率常数。
The degradation characteristics of two typical target endocrine disrupting chemicals （EDCs）, ie nonylphenol （NP） and 17α -ethinylestradiol （EE2） were dectected by gas chromatography/mass spectrometry（GC/MS）. The paper investigated with the processes of ozone （O3 ）, ozone/hydrogen peroxide （ O3/H202 ）, ozone/ultrasound （O3/US） through batch experiment. Also, ozone reaction kinetics for the target compounds were preliminary studied. The results indicated that the removal rates of the target compounds were enhanced considerably with the two combined processes, they increased by 9.6% -17.7% for NP, and 14.6% -23.4% for EE2. Besides, the removal rates were enhanced with the ozone dose and pH value increase, when H2O2/O3 molar ratios increased, the removal rates went up firstly and then declined, and the maximal removal rate was obtained at molar ratio 0.6. Ultrasound enhanced ozone oxidation efficiency, however, the variations of ultrasonic power in the selected range （ 60 - 240W） could not lead to distinct changes of the removal rate. The ozone oxidization of the target compounds conformed to the pseudo - first - order reaction kinetics, and the rate constant was higher under the alkaline condition than under the acidic one as well as tertiary butanol -adding condition.
出处
《水资源与水工程学报》
2013年第2期5-9,14,共6页
Journal of Water Resources and Water Engineering
基金
国家自然科学基金项目(51279108)
上海市教委科研创新项目(12YZ100)
国家重点实验室专项基金课题(12K11ESPCT)
