高等学校化学学报 ›› 2019, Vol. 40 ›› Issue (4): 800-808.doi: 10.7503/cjcu20180658

• 物理化学 • 上一篇    下一篇

溶解有机质对光照自然水体生物膜体系中H2O2生成的影响

董德明, 张影, 花修艺(), 姜旭, 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, 新能源与环境学院, 长春 130012
  • 收稿日期:2018-09-28 出版日期:2019-04-03 发布日期:2019-01-24
  • 作者简介:

    联系人简介: 花修艺, 男, 博士, 教授, 博士生导师, 主要从事环境化学方面的研究. E-mail: huaxy@jlu.edu.cn

  • 基金资助:
    吉林省自然科学基金(批准号: 20170101079JC)和国家自然科学基金(批准号: 21577047)资助.

Effect of Dissolved Organic Matter on the Generation of H2O2 in Natural Biofilm Systems Under Illumination

DONG Deming, ZHANG Ying, HUA Xiuyi*(), JIANG Xu, 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 New Energy and Environment, Jilin University, Changchun 130012, China
  • Received:2018-09-28 Online:2019-04-03 Published:2019-01-24
  • Contact: HUA Xiuyi E-mail:huaxy@jlu.edu.cn
  • Supported by:
    † Supported by the Natural Science Foundation of Jilin Province, China(No.20170101079JC) and the National Natural Science Foundation of China(No.21577047).

摘要:

通过模拟实验研究了生物膜胞外聚合物(EPS)和乙二胺四乙酸(EDTA) 2种典型溶解有机质(DOM)成分对自然水体生物膜体系中过氧化氢(H2O2)生成特征的影响, 并研究了体系初始pH值、 DOM浓度、 溶解氧(DO)等因素的影响. 结果表明, DOM的存在对自然水体生物膜体系中H2O2的生成有明显影响. 光照能促使EPS产生H2O2, 而EPS的存在对生物膜产生H2O2的直接影响不显著, EPS与生物膜共存体系中的H2O2由二者共同产生; EDTA本身不产生H2O2, 且对H2O2分解影响很小, 但会显著抑制生物膜产生H2O2, 且浓度越高抑制作用越明显. 体系pH值、 DOM浓度和DO均能不同程度影响EPS产生H2O2及EDTA抑制生物膜产生H2O2的作用.

关键词: 溶解有机质, 自然水体生物膜, 胞外聚合物, 乙二胺四乙酸, 过氧化氢

Abstract:

The effects of dissolved organic matter(DOM) on the generation characteristics of hydrogen per-oxide(H2O2) in natural biofilm systems were studied. The biofilm extracellular polymeric substances(EPS) and ethylenediamine tetraacetic acid(EDTA) were chosen as two typical DOM components. The results show that the presence of DOM has significant influences on the generation of H2O2. Illumination can promote EPS to produce H2O2 and EPS has no significant direct influences on generation of H2O2 by biofilms. H2O2 in the coexistence system is produced by both EPS and biofilms. EDTA doesn’t produce H2O2 itself and has little influence on decomposition of H2O2, while showing significantly inhibition correlating to EDTA concentrations positively on the generation of H2O2 by biofilms. The pH value, DOM concentration and dissolved oxygen(DO) of the systems can varyingly affect the generation of H2O2 by EPS and the inhibition of EDTA on the generation of H2O2 in biofilms. Therefore, DOM has influences on both the generation of H2O2 in biofilms and the concentration of H2O2 in water environment, and the influences of different DOM components with different structures and properties may be significantly different.

Key words: Dissolved organic matter, Natural biofilm, Extracellular polymeric substance, Ethylenediaminetetraacetic acid, Hydrogen peroxide

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