Comparative Sorption and Desorption of Benzo[a]pyrene and 3,4,3‘,4‘-Tetrachlorobiphenyl in Natural Lake Water Containing Dissolved Organic Matter

2005 ◽  
Vol 39 (19) ◽  
pp. 7529-7534 ◽  
Author(s):  
Jarkko Akkanen ◽  
Anita Tuikka ◽  
Jussi V. K. Kukkonen
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Lake Water ◽  
Natural Lake

Systematic microbial production of optically active dissolved organic matter in subarctic lake water

2019 ◽  
Vol 65 (5) ◽  
pp. 951-961
Author(s):  
Martin Berggren ◽  
Cristian Gudasz ◽  
Francois Guillemette ◽  
Geert Hensgens ◽  
Linlin Ye ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Lake Water ◽  
Optically Active ◽  
Microbial Production ◽  
Subarctic Lake

Dynamics and Characteristics of Fluorescent Dissolved Organic Matter in the Groundwater, River and Lake Water

2007 ◽  
Vol 184 (1-4) ◽  
pp. 157-176 ◽  
Author(s):  
Khan M. G. Mostofa ◽  
Takahito Yoshioka ◽  
Eiichi Konohira ◽  
Eiichiro Tanoue
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Lake Water ◽  
Fluorescent Dissolved Organic Matter

Electricity generation from dissolved organic matter in polluted lake water using a microbial fuel cell (MFC)

2013 ◽  
Vol 71 ◽  
pp. 57-61 ◽  
Author(s):  
Yan-Rong He ◽  
Xiang Xiao ◽  
Wen-Wei Li ◽  
Pei-Jie Cai ◽  
Shi-Jie Yuan ◽  
...  
Keyword(s):  
Organic Matter ◽  
Fuel Cell ◽  
Dissolved Organic Matter ◽  
Microbial Fuel Cell ◽  
Lake Water ◽  
Electricity Generation ◽  
Polluted Lake

Selective loss and preservation of lake water dissolved organic matter fluorescence during long-term dark incubations

2012 ◽  
Vol 433 ◽  
pp. 238-246 ◽  
Author(s):  
Dolly N. Kothawala ◽  
Eddie von Wachenfeldt ◽  
Birgit Koehler ◽  
Lars J. Tranvik
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Lake Water ◽  
Selective Loss

scholarly journals Molecular Determinants of Dissolved Organic Matter Reactivity in Lake Water

2017 ◽  
Vol 5 ◽  
Author(s):  
Alina Mostovaya ◽  
Jeffrey A. Hawkes ◽  
Thorsten Dittmar ◽  
Lars J. Tranvik
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Lake Water ◽  
Molecular Determinants

scholarly journals Characterizing dissolved organic matter in Taihu Lake with PARAFAC and SOM method

2022 ◽  
Author(s):  
W. Zhang ◽  
T. Li ◽  
B. Dong
Keyword(s):  
Neural Network ◽  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Fluorescence Spectrum ◽  
Spectrum Analysis ◽  
Lake Water ◽  
Taihu Lake ◽  
Three Dimensional ◽  
Fluorescence Characteristics ◽  
Network Method

Abstract The three-dimensional fluorescence spectrum has a significant amount of information than the single-stage scanning fluorescence spectrum. At the same time, the parallel factor (PARAFAC) analysis and neural network method can help explore the fluorescence characteristics further, thus could be used to analyse multiple sets of three-dimensional matrix data. In this study, the PARAFAC analysis and the self-organizing mapping (SOM) neural network method are firstly introduced comprehensively. They are then adopted to extract information of the three-dimensional fluorescence spectrum data set for fluorescence characteristics analysis of dissolved organic matter (DOM) in Taihu Lake water. Forty water samples with DOM species were taken from different seasons with the fluorescence information obtained through the three-dimensional fluorescence spectrum analysis, PARAFAC analysis and SOM analysis. The PARAFAC analysis results indicated that the main fluorescence components of dissolved organic matter in Taihu Lake water were aromatic proteins, fulvic acids, and dissolved microorganisms. While the SOM analysis results exhibited that the fluorescence characteristics of the dissolved organics in Taihu Lake varied seasonally. Therefore, the combined method of the three-dimensional fluorescence spectrum analysis, PARAFAC and SOM analysis can provide important information for the characterization of the fluorescence properties of dissolved organic matter in surface water bodies.

Photodegradation of nitrite in lake waters: role of dissolved organic matter

2009 ◽  
Vol 6 (5) ◽  
pp. 407 ◽  
Author(s):  
Davide Vione ◽  
Marco Minella ◽  
Claudio Minero ◽  
Valter Maurino ◽  
Paolo Picco ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Hydroxyl Radical ◽  
Lake Water ◽  
Pure Water ◽  
Mixing Layer ◽  
Life Time ◽  
Model Calculations ◽  
Lake Waters

Environmental context. Nitrite is an important nutrient in surface waters, a key intermediate in the interconversion of nitrate into ammonium, and a considerable photochemical source of reactive species such as the hydroxyl radical. We have found that scavengers of hydroxyl radicals such as dissolved organic matter, which are usually supposed to inhibit the photodegradation of dissolved compounds, are able on the contrary to enhance the phototransformation of nitrite. The three weeks’ lifetime of nitrite in the surface layer of lakes, derived from the results of the present work, would make photochemistry an important issue in determining the concentration of nitrite in lake water. Abstract. Here we studied the degradation rate of nitrite (NO2–), added to lake water at sub-micromolar levels, upon ultraviolet (UV) irradiation. NO2– photodegradation was considerably faster in lake water compared with ultra-pure water. A key issue was the presence in lake water of hydroxyl radical (•OH) scavengers that inhibited the reaction between NO2– and •OH. Such a reaction, while causing additional NO2– transformation, produced nitrogen dioxide (NO2•) that was subsequently involved into the regeneration of NO2– by dimerisation or the reaction with nitric oxide (NO•). The scavenging of •OH by compounds different from NO2– (mainly dissolved organic matter, DOM) prevented the regeneration reactions from taking place, and enhanced the phototransformation of NO2–. Model calculations for the direct photolysis of NO2–, applied to the lake water samples, yielded a NO2– half-life time of around three weeks in the mixing layer of the lakes because of photodegradation. Therefore, we conclude that photodegradation is a potentially important process to control the concentration of NO2– in shallow lakes, or in deeper ones under stratification conditions.

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