Photoformation of low-molecular-weight organic acids from brown water dissolved organic matter

被引:113
作者
Brinkmann, T [1 ]
Hörsch, P [1 ]
Sartorius, D [1 ]
Frimmel, FH [1 ]
机构
[1] Univ Karlsruhe, Engler Bunte Inst, D-76128 Karlsruhe, Germany
关键词
D O I
10.1021/es0263339
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
This work describes the effects of simulated solar UV light on the bulk properties of dissolved organic matter (DOM) of bog lake water and on the formation of low-molecular-weight organic acids (LMWOAs). By means of size-exclusion chromatography it was shown that the more hydrophilic moieties of the DOM were preferentially photodegraded while the more hydrophobic ones remained relatively unaffected or were even formed. The combined photochemical-biological degradation proved to be more important than the pure photochemical mineralization. Formic, acetic, pyruvic, oxalic, malonic, and succinic acids were identified as important degradation products. Their contribution to the dissolved organic carbon increased from 0.31% before to 6.4% after 24 h irradiation. About 33% of the bioavailable photoproducts of DOM were comprised of these LMWOAs. The influence of nitrate on the formation of carboxylic acids could not be observed in the investigated system. Kinetic experiments indicated that degradation of LMWOAs occurred simultaneously during irradiation experiments, alpha-oxygen-substituted LMWOAs being more amenable to these processes. Dissolved iron acted as a catalyst of DOM photodegradation and LMWOA photoformation. Copper played an antagonistic role in the irradiation experiments, reducing the formation of formic, acetic, and malonic acids while increasing the formation of oxalic acid.
引用
收藏
页码:4190 / 4198
页数:9
相关论文
共 50 条
[31]   Effects of low-molecular-weight organic acids on uptake of lanthanum by wheat roots [J].
Zhongwen Wang ;
Shuzhen Zhang ;
Xiao-Quan Shan .
Plant and Soil, 2004, 261 :163-170
[32]   Electrochemical and Spectrometric Detection of Low-Molecular-Weight Organic Acids and their Complexes with Metals [J].
Jaklova Dytrtova, Jana ;
Jakl, Michal ;
Schroeder, Detlef ;
Navratil, Tomas .
CURRENT ORGANIC CHEMISTRY, 2011, 15 (17) :2970-2982
[33]   Low-molecular-weight organic acids in precipitation in Zunyi city, Guizhou province [J].
Jiang, Wei ;
Lee, Xin-Qing ;
Zeng, Yong ;
Huang, Rong-Sheng ;
Tan, Ling ;
Xu, Gang ;
Wang, Bing .
Huanjing Kexue/Environmental Science, 2008, 29 (09) :2425-2431
[34]   Effects of surfactants on low-molecular-weight organic acids to wash soil zinc [J].
Yue Chen ;
Shirong Zhang ;
Xiaoxun Xu ;
Ping Yao ;
Ting Li ;
Guiyin Wang ;
Guoshu Gong ;
Yun Li ;
Ouping Deng .
Environmental Science and Pollution Research, 2016, 23 :4629-4638
[35]   Effects of low-molecular-weight organic acids on uptake of lanthanum by wheat roots [J].
Wang, ZW ;
Zhang, SZ ;
Shan, XQ .
PLANT AND SOIL, 2004, 261 (1-2) :163-170
[36]   ORGANIC-ACIDS OF LOW-MOLECULAR-WEIGHT IN PALMITA-TYPE CHEESE [J].
FERRER, A ;
GRANADOS, A .
FOOD CHEMISTRY, 1992, 45 (05) :311-317
[37]   Adsorption of trichlorphon on phyllosilicate minerals: Effect of low-molecular-weight organic acids [J].
Chen, Hongfeng ;
He, Zhouyang ;
Hou, Mingxia ;
Tang, Cilai ;
Wu, Yonghong .
PEDOSPHERE, 2024, 34 (01) :78-87
[38]   Adsorption of trichlorphon on phyllosilicate minerals:Effect of low-molecular-weight organic acids [J].
Hongfeng CHEN ;
Zhouyang HE ;
Mingxia HOU ;
Cilai TANG ;
Yonghong WU .
Pedosphere, 2024, 34 (01) :78-87
[39]   Effects of surfactants on low-molecular-weight organic acids to wash soil zinc [J].
Chen, Yue ;
Zhang, Shirong ;
Xu, Xiaoxun ;
Yao, Ping ;
Li, Ting ;
Wang, Guiyin ;
Gong, Guoshu ;
Li, Yun ;
Deng, Ouping .
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH, 2016, 23 (05) :4629-4638
[40]   Multispectral Structural Characterization of Low-Molecular-Weight Organic Acids Modified Urea [J].
Zhang Ying-qiang ;
Zhang Shui-qin ;
Wang Li-yan ;
Yuan Liang ;
Li Yan-ting ;
Xiong Qi-zhong ;
Lin Zhi-an ;
Zhao Bing-qiang .
SPECTROSCOPY AND SPECTRAL ANALYSIS, 2021, 41 (10) :3129-3136