scholarly journals Source and distribution of carbon and nitrogen in the suspended organic matter in the migratory bird habitat of Poyang Lake: The case study of Lake Dahuchi and Lake Shahu

2018 ◽  
Vol 30 (6) ◽  
pp. 1655-1663
Author(s):  
LIANG Yue ◽  
◽  
XIAO Huayun ◽  
LIU Xiaozhen ◽  
HU Qianqian ◽  
...  
Keyword(s):  
Organic Matter ◽  
Poyang Lake ◽  
Migratory Bird ◽  
Suspended Organic Matter ◽  
Carbon And Nitrogen ◽  
Bird Habitat

The Biological Sources of the Organic Matter in Poyang Lake Sediments

2013 ◽  
Vol 724-725 ◽  
pp. 431-436
Author(s):  
Ming Sheng Yang
Keyword(s):  
Organic Matter ◽  
Poyang Lake ◽  
Aquatic Organism ◽  
High Carbon ◽  
Carbon And Nitrogen ◽  
Biological Source ◽  
Biological Sources ◽  
Carbon And Nitrogen Content ◽  
Compound Specific Carbon Isotope ◽  
Absolute Advantage

We conducts a systematic study on the biological sources of the sediment organic matter through the analysis of the organic carbon and nitrogen content in the sediments of Poyang Lake, the n-alkanes as biomarker and the characteristics of the compound-specific isotope of n-alkanes. It is found that the C/N ratio of organic matter is less than 10 in Poyang Lake and that the organic matter mainly originates from lacustrine aquatic organism. The short-chain hydrocarbon takes absolute advantage in the n-alkanes. The value of C21-/C22+is greater than 1, which shows that the biomass of bacteria and algae is greater than the sum of the aquatic submerged plants and terrigenous organisms biomass. The value of (nC15+nC17)/(nC23+nC25) of n-alkanes is greater than 2, which reveals that bacteria and algae have an absolute predominance in aquatic organism. The high carbon n-alkanes come from terrigenous plants and their compound-specific carbon isotope demonstrates that C3plant is the main biological source.

Decolorisation of natural organic matter by Phanerochaete chrysosporium: the effect of environmental conditions

2004 ◽  
Vol 4 (4) ◽  
pp. 175-182 ◽  
Author(s):  
K. Rojek ◽  
F.A. Roddick ◽  
A. Parkinson
Keyword(s):  
Organic Matter ◽  
Ionic Strength ◽  
Natural Organic Matter ◽  
Phanerochaete Chrysosporium ◽  
Fungal Growth ◽  
Low Ph ◽  
Colour Removal ◽  
Humic Material ◽  
Carbon And Nitrogen ◽  
Carbon And Nitrogen Content

Phanerochaete chrysosporium was shown to rapidly decolorise a solution of natural organic matter (NOM). The effect of various parameters such as carbon and nitrogen content, pH, ionic strength, NOM concentration and addition of Mn2+ on the colour removal process was investigated. The rapid decolorisation was related to fungal growth and biosorption rather than biodegradation as neither carbon nor nitrogen limitation, nor Mn2+ addition, triggered the decolorisation process. Low pH (pH 3) and increased ionic strength (up to 50 g L‒1 added NaCl) led to greater specific removal (NOM/unit biomass), probably due to increased electrostatic bonding between the humic material and the biomass. Adsorption of NOM with viable and inactivated (autoclaved or by sodium azide) fungal pellets occurred within 24 hours and the colour removal depended on the viability, method of inactivation and pH. Colour removal by viable pellets was higher under the same conditions, and this, combined with desorption data, confirmed that fungal metabolic activity was important in the decolorisation process. Overall, removals of up to 40–50% NOM from solution were obtained. Of this, removal by adsorption was estimated as 60–70%, half of which was physicochemical, the other half metabolically-dependent biosorption and bioaccumulation. The remainder was considered to be removed by biodegradation, although some of this may be ascribed to bioaccumulation and metabolically-dependent biosorption.

The effect of organic matter maturity on kinetics and product distribution during kerogen thermal decomposition: the Bazhenov Formation case study

2021 ◽  
Vol 204 ◽  
pp. 108751
Author(s):  
Evgeniya Leushina ◽  
Polina Mikhaylova ◽  
Elena Kozlova ◽  
Veniamin Polyakov ◽  
Nikita Morozov ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Organic Matter ◽  
Product Distribution ◽  
Bazhenov Formation
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