高等学校化学学报Issue(7)：1337-1343,7.DOI:10.7503/cjcu20150102
自然水体生物膜体系中过氧化氢浓度的影响因素
Investigation on the Factors Affecting Hydrogen Peroxide Concentrations in Natural Biofilm Systems†
摘要
Abstract
In this study, hydrogen peroxide( H2 O2 ) was selected as a representative of reactive oxygen spe-cies( ROS) to investigate the effect of factors, such as light/dark variation, dark pretreatment of biofilms, bio-film quantity, presence of ligands and pH value of the solutions, on H2 O2 concentrations in natural biofilms-water systems. The results indicated that H2 O2 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 H2 O2 concentrations and the increasing rate. The increase and decrease of biofilm quantity led to corresponding change of H2 O2 concentrations in the systems. The presence of organic ligands reduced the H2 O2 concentrations ( by about 1/2—1/3 ) . H2 O2 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 H2 O2 generation of natural biofilms, H2 O2 decomposition and H2 O2 removal by biofilms.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Key words
Natural biofilm/Hydrogen peroxide/Affecting factor/Visible light illumination/Photosynthesis分类
化学化工引用本文复制引用
董德明,孙家倩,赵天宇,李明,花修艺,梁大鹏,郭志勇..自然水体生物膜体系中过氧化氢浓度的影响因素[J].高等学校化学学报,2015,(7):1337-1343,7.基金项目
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.@@@@? 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) （批准号:21277056）
