Distribution and characteristics of ultraviolet absorption and fluorescenceof dissolved organic matter in a large lake (Lake Biwa, Japan)

2016 ◽  
Vol 42 (3) ◽  
pp. 571-579 ◽  
Author(s):  
Kazuhide Hayakawa ◽  
Reiji Kojima ◽  
Chizuru Wada ◽  
Tomoyo Suzuki ◽  
Yuko Sugiyama ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Lake Biwa ◽  
Ultraviolet Absorption ◽  
Large Lake

scholarly journals Biodegradation of Dissolved Organic Matter (DOM) Released from Phytoplankton in Lake Biwa

2012 ◽  
Vol 28 (7) ◽  
pp. 675-681 ◽  
Author(s):  
Etsu YAMADA ◽  
Shinya OHARA ◽  
Takashi UEHARA ◽  
Takaaki HIROTA ◽  
Naoko HATORI ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Lake Biwa

scholarly journals Behavior of Humic Substances and Algal Dissolved Organic Matter as Precursors of Trihalomethane in Lake Biwa

2009 ◽  
Vol 58 (4) ◽  
pp. 231-240 ◽  
Author(s):  
Shinya Ohara ◽  
Takashi Uehara ◽  
Keiichiro Kimura ◽  
Tetsuro Yoshida ◽  
Shohei Fujiwara ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Humic Substances ◽  
Lake Biwa

Three-dimensional fluorescence as a tool for investigating the dynamics of dissolved organic matter in the Lake Biwa watershed

Limnology ◽  
2005 ◽  
Vol 6 (2) ◽  
pp. 101-115 ◽  
Author(s):  
Khan M. G. Mostofa ◽  
Takahito Yoshioka ◽  
Eiichi Konohira ◽  
Eiichiro Tanoue ◽  
Kazuhide Hayakawa ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Lake Biwa ◽  
Three Dimensional

scholarly journals Fractionation of Dissolved Organic Matter (DOM) as Precursors of Trihalomethane in Lake Biwa and Yodo Rivers

2005 ◽  
Vol 54 (9) ◽  
pp. 923-928 ◽  
Author(s):  
Kenichi NAGAI ◽  
Sinichi AOKI ◽  
Yasuro FUSE ◽  
Etsu YAMADA
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Lake Biwa

Enhanced Coagulation for Removal of Dissolved Organic Matter and Trihalomethane Formation Potential from Raw Water Supply in Sri-Trang Reservoir, Thailand

2011 ◽  
Vol 6 (1) ◽  
Author(s):  
Tassana Kueseng ◽  
Thunwadee Tachapattaworakul Suksaroj ◽  
Charongpun Musikavong ◽  
Chaisri Suksaroj
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Water Supply ◽  
Cationic Polymer ◽  
Ultraviolet Absorption ◽  
Raw Water ◽  
Polyaluminum Chloride ◽  
Formation Potential ◽  
Trihalomethane Formation Potential ◽  
Coagulation Process

The present research aims to examine the coagulation process enhancement for dissolved organic matter (DOM) and The present research aims to examine the coagulation process enhancement for dissolved organic matter (DOM) and trihalomethane formatation potential (THMFP) removal from a raw water supply with low turbidity and specific ultraviolet absorption (SUVA). Coagulation conditions were optimized using polyaluminum chloride (PACl), PACl with dry cationic polymer (polymer), and PACl with polymer and powder activated carbon (PAC). DOM was measured in terms of dissolved organic carbon (DOC) and ultraviolet absorption at a wavelength of 254 nm (UV-254). Results show that the optimal condition for PACl, PACl and polymer, and PACl with polymer and PAC coagulation were PACl 20 mg/L at pH 7, PACl 20 mg/L and polymer 0·1 mg/L, and PACl 20 mg/L with polymer 0·1 mg/L and PAC 10 mg/L, respectively. When the DOM contents in coagulated water were fractioned to be hydrophilic (HPI) and hydrophobic (HPO) groups, it was found that the coagulation process could effectively remove more DOC of HPO than DOC of HPI. The coagulation using PACl combined with polymer and PAC provided the highest level of DOC of HPI, DOC of HPO, Trihalomethane formation potential (THMFP) of HPI, and THMFP of HPO removal efficiencies and were shown to be 65%, 75%, 77%, and 79%, respectively.

Characterization of dissolved organic matter in watersheds of Lake Biwa and Lake Kasumigaura by excitation-emission matrix fluorescence spectroscopy and application of humification index

2008 ◽  
Vol 8 (6) ◽  
pp. 663-671 ◽  
Author(s):  
T. Kusakabe ◽  
T. Kitamura ◽  
Y. Suzuki
Keyword(s):  
Organic Matter ◽  
Fluorescence Spectroscopy ◽  
Dissolved Organic Matter ◽  
Paddy Field ◽  
Municipal Wastewater ◽  
Lake Biwa ◽  
Lake Kasumigaura ◽  
Humification Index ◽  
Excitation Emission Matrix ◽  
Vertical Variations

The objectives of this research were to characterize dissolved organic matter (DOM) by excitation-emission matrix (EEM) fluorescence spectroscopy and to apply humification index (HIX) to differentiate the origin and extent of humification of DOMs in watersheds of Lake Biwa and Lake Kasumigaura, Japan. EEM and HIX techniques were applied to lacustrine, riverine, and effluent organic matters. EEM spectra suggest that algal activity and the thermocline formation are critical to composition and distribution of DOM in Lake Biwa. Lake Kasumigaura DOM is evenly distributed over the lake. The effects of allochthonous sources are more conclusive for Lake Kasumigaura DOM than for Lake Biwa DOM. Seasonal and vertical variations in HIX were observed in Lake Biwa similar to results by EEM approach. Upstream DOMs were mostly humified fulvic acid originating from forest soil. DOM from a paddy field and municipal wastewater had the lowest HIX value and consisted mainly of less humified, fresh organic materials. Lacustrine and effluent DOMs demonstrated the same extent of humification in watersheds of Lake Biwa and Lake Kasumigaura. Allochthonous sources such as elution from a paddy field and municipal wastewater are more responsible for the composition of Lake Kasumigaura DOM compared to that of Lake Biwa DOM.

Seasonal and spatial variations in characteristics of Lake Biwa dissolved organic matter: sorption of pyrene and its derivatives and fluorescence properties

2008 ◽  
Vol 58 (8) ◽  
pp. 1609-1614
Author(s):  
T. Kusakabe ◽  
K. Ikeda ◽  
Y. Shimizu ◽  
S. Higashi ◽  
Y. Kawabata ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Lake Biwa ◽  
Vertical Mixing ◽  
Three Dimensional ◽  
Spatial Variations ◽  
Fluorescence Properties ◽  
Sorption Coefficient ◽  
Suwannee River Fulvic Acid ◽  
Seasonal And Spatial Variations

The objectives of this research were to investigate seasonal and spatial variations in (1) sorption of pyrene and its derivatives onto dissolved organic matter (DOM) and (2) fluorescence properties of DOM in Lake Biwa, Japan. In the case of pyrene, sorption coefficient (Kdoc) of Lake Biwa DOM seasonally changed from 1,200 to 3,800 L/kgC. Vertical distribution of Kdoc was affected by thermocline formation in summer, while it was uniformly distributed as a result of vertical mixing in winter. Functional groups affected sorption of pyrene onto Lake Biwa DOM in different manner from that onto Suwannee River fulvic acid. Three-dimensional excitation emission matrices (3D-EEMs) fluorescence spectroscopy was applied to characterize Lake Biwa DOMs and indicated the existence of at least two fluorophores. The two major peaks at Ex230/Em300 and Ex230/Em425 originated from protein-like and fulvic/humic-like substances, respectively. The peak at Ex230/Em300 showed the maximum fluorescence intensity at a depth of 5 m and could be affected by stratification of the water column in summer. On the other hand, the peak at Ex230/Em425 showed similar profiles both in summer and in winter. These results demonstrably showed that sorption of micropollutants and fluorescence properties of Lake Biwa DOMs were seasonally and spatially varied.

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