水体系中链霉素的光降解研究
详细信息 查看官网全文
- 英文论文题名：The photodegradation of streptomycin in the water system
- 论文作者：张春玲 ; 贾瑞梅 ; 赵文岩
- 英文论文作者：chunling Zhang ; ruimei Jia ; wenyan Zhao ; Department of Chemistry ; Inner Mongolia university
- 年：2016
- 作者机构：内蒙古大学;
- 论文关键词：链霉素 ; UV-Vis ; 模拟太阳光 ; HA
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第二十六分会：环境化学
- 语种：中文
- 分类号：X131.2
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第二十六分会 ; 环境化学
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：238k
- 原文格式：D
- 会议级别：全国
摘要
研究了UV-Vis(λ>200nm)和模拟太阳光(λ>290nm)下链霉素的光降解过程,探讨起始浓度,光源,溶液PH值,HA,Cl-1等因素对链霉素光降解速率的影响。结果表明,链霉素在UV-Vis下的光降解速率比在模拟太阳光下快,均符合一级反应动力学方程;通过液相质谱联用,光解途径主要为母体的断裂反应,中间产物为链霉胍、链霉糖和N-甲基-L-葡萄糖胺,在模拟太阳光照射下链霉素母体断裂较慢,断裂产物不降解,而在UV-Vis下链霉素母体断裂较快,断裂产物也逐渐降解;随着链霉素初始浓度增大,降解速率降低;当改变溶液PH时,均能促进降解,酸性条件下降解速率大于碱性条件大于中性;在模拟太阳光照射下,由于HA吸收光,从而引发链霉素的光敏化反应,促进了链霉素的光降解,而在UV-Vis下,HA的光掩蔽效应则抑制了链霉素的光降解;在UV-Vis下,Cl-1促进了1O2的产生,从而加快了链霉素的自敏化光解,而在模拟太阳光照射下,链霉素没有光吸收,所以不存在产生1O2的过程,从而Cl-1不影响链霉素的光降解。
The photodegradation of streptomycin was studied under UV–Vis(λ> 200nm) and simulated solar irradiation(λ>290nm).The effects of initial concentration,light source,pH,HA and Cl-1on the photodegradation of streptomycin were investigated.The results showed the photodegradation rate of streptomycin under UV-Vis was faster than under simulated sunlight and both followed a pseudo first-order kinetic law.The main degradation pathway was found by using LC-MS techniques.With streptomycin initial concentration increasing the degradation rate decreased.The photodegradation of streptomycin could be accelerated in acidic or alkaline environment.
The photodegradation of streptomycin was studied under UV–Vis(λ> 200nm) and simulated solar irradiation(λ>290nm).The effects of initial concentration,light source,pH,HA and Cl-1on the photodegradation of streptomycin were investigated.The results showed the photodegradation rate of streptomycin under UV-Vis was faster than under simulated sunlight and both followed a pseudo first-order kinetic law.The main degradation pathway was found by using LC-MS techniques.With streptomycin initial concentration increasing the degradation rate decreased.The photodegradation of streptomycin could be accelerated in acidic or alkaline environment.
引文
[1]Sudha Rani Batchu,Venkata R.Panditi,Kevin E.O'Shea,Piero R.Gardinali,Sci.Total Environ.2014:299–310
[2]Lei Tong,Peter Eichhorn,Sandra Pérez,Yanxin Wanga,Chemosphere,2011,83:340–348
[3]Danna Zhou,Wenyu Huan,Chaoqun Han,Reac.Kinet.Mech.Cat.2010,100:45–53
[2]Lei Tong,Peter Eichhorn,Sandra Pérez,Yanxin Wanga,Chemosphere,2011,83:340–348
[3]Danna Zhou,Wenyu Huan,Chaoqun Han,Reac.Kinet.Mech.Cat.2010,100:45–53