高等学校化学学报 ›› 2015, Vol. 36 ›› Issue (7): 1337.doi: 10.7503/cjcu20150102

• 物理化学 • 上一篇    下一篇

自然水体生物膜体系中过氧化氢浓度的影响因素

董德明, 孙家倩, 赵天宇, 李明, 花修艺(), 梁大鹏, 郭志勇   

  1. 吉林大学地下水资源与环境教育部重点实验室, 水资源与水环境吉林省重点实验室,环境与资源学院, 长春 130012
  • 收稿日期:2015-01-29 出版日期:2015-07-10 发布日期:2015-06-17
  • 作者简介:联系人简介: 花修艺, 男, 博士, 教授, 博士生导师, 主要从事环境化学研究. E-mail:huaxy@jlu.edu.cn
  • 基金资助:
    国家自然科学基金(批准号: 21277056)和国家“水体污染控制与治理”科技重大专项项目(批准号: 2012ZX07202009)资助

Investigation on the Factors Affecting Hydrogen Peroxide Concentrations in Natural Biofilm Systems

DONG Deming, SUN Jiaqian, ZHAO Tianyu, LI Ming, HUA Xiuyi*(), LIANG Dapeng, GUO Zhiyong   

  1. Key Lab of Groundwater Resources and Environment of Ministry of Education, Key Lab of Water Resources and Aquatic Environment of Jilin Province, College of Environment and Resources, Jilin University, Changchun 130012, China
  • Received:2015-01-29 Online:2015-07-10 Published:2015-06-17
  • Contact: HUA Xiuyi E-mail:huaxy@jlu.edu.cn
  • Supported by:
    † Supported by the National Natural Science Foundation of China(No.21277056) and the Major Science and Technology Program for Water Pollution Control and Treatment in China(No.2012ZX07202009)

摘要:

以过氧化氢(H2O2)为自然水体生物膜产生的活性氧(ROS)的代表, 通过模拟实验, 研究了水-自然水体生物膜体系中光/暗变化、 生物膜的避光预处理与数量、 有机配体和pH值对体系中H2O2浓度的影响. 结果表明, 光照可快速增加体系中H2O2浓度, 光照转为无光时体系H2O2浓度下降(约为光照时的2/3); 避光预处理会显著降低体系中H2O2的产生速率和浓度; 生物膜数量的增减会导致体系H2O2浓度的相应增减; 有机配体的存在会使体系内H2O2浓度下降(约1/2~1/3); pH=7和5的体系中H2O2的浓度高于pH=9的体系(高出约1.5倍). 上述各因素主要通过影响生物膜生产H2O2、 H2O2自然分解和生物膜去除H2O2 3种作用来影响体系H2O2浓度.

关键词: 自然水体生物膜, 过氧化氢, 影响因素, 可见光照, 光合作用

Abstract:

In this study, hydrogen peroxide(H2O2) was selected as a representative of reactive oxygen species(ROS) to investigate the effect of factors, such as light/dark variation, dark pretreatment of biofilms, biofilm quantity, presence of ligands and pH value of the solutions, on H2O2 concentrations in natural biofilms-water systems. The results indicated that H2O2 concentration increased rapidly under illumination, and the H2O2 concentration decreased(to about 2/3) when the systems switched to darkness. Dark pretreatment signi-ficantly reduced both the H2O2 concentrations and the increasing rate. The increase and decrease of biofilm quantity led to corresponding change of H2O2 concentrations in the systems. The presence of organic ligands reduced the H2O2 concentrations(by about 1/2—1/3). H2O2 concentrations in neutral and acidic systems(pH=7 and 5) were about 1.5 times as high as that in basic system(pH=9). These factors affected H2O2 concentrations in the biofilm systems by affecting three key processes, which were H2O2 generation of natural biofilms, H2O2 decomposition and H2O2 removal by biofilms.

Key words: Natural biofilm, Hydrogen peroxide, Affecting factor, Visible light illumination, Photosynthesis

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