Understanding transport and transformation of dissolved inorganic carbon (DIC) in the reservoir system using δ13CDIC and water chemistry

2019 ◽  
Vol 574 ◽  
pp. 193-201 ◽  
Author(s):  
Wanfa Wang ◽  
Si-Liang Li ◽  
Jun Zhong ◽  
Cai Li ◽  
Yuanbi Yi ◽  
...  
Keyword(s):  
Water Chemistry ◽  
Inorganic Carbon ◽  
Dissolved Inorganic Carbon ◽  
Transport And Transformation ◽  
Reservoir System

Dissipation of Permethrin in Limnocorrals

1985 ◽  
Vol 42 (1) ◽  
pp. 70-76 ◽  
Author(s):  
K. R. Solomon ◽  
J. Y. Yoo ◽  
D. Lean ◽  
N. K. Kaushik ◽  
K. E. Day ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Water Chemistry ◽  
Inorganic Carbon ◽  
Dissolved Inorganic Carbon ◽  
Secchi Disk ◽  
Secchi Disk Depth ◽  
Southern Ontario ◽  
First Order ◽  
First Order Kinetics ◽  
Rate Of Dissipation

Permethrin (3-phenoxybenzyl(1RS)-cis,trans-3-(2,2-dimethy[-3-dichlorovinyl)-2,2-dimethylcyciopropanecarboxylate) applied to approximately 100-m3 enclosures (limnocorrals) in a small mesotrophic lake in Southern Ontario (47°51′25″N; 77°25′30″W) at concentrations of 500, 50, 5, and 0.5 μ∙L−1 dissipated from the water rapidly and approximated first-order kinetics in the first 8–12 d. Time taken for 50 and 90% dissipation ranged from 1.65 and 3.65 d, respectively, at 0.5 μ∙L−1 to 3.5 and 6.75 d, respectively, at 50 μ∙L−1. Inter- and intra-seasonal replication of dissipation patterns was good. Rate of dissipation varied slightly with depth, normally being slower at greater depth. Absorption of permethrin to sediments was rapid, penetration shallow, and disappearance slow. Permethrin had no effect on water chemistry but there was an increase in the Secchi disk depth in the treated limnocorrals. Dissolved inorganic carbon decreased in all limnocorrals, including controls after treatment, suggesting precipitation of calcium carbonate which may act as a scavenging agent for permethrin in the water. Limnocorrals are a useful tool for evaluating the behavior of pesticides in the aquatic system.

Multi-isotope (15N, 18O and 13C) indicators of sources and fate of nitrate in the upper stream of Chaobai River, Beijing, China

2014 ◽  
Vol 16 (11) ◽  
pp. 2644-2655 ◽  
Author(s):  
Cai Li ◽  
Yongbin Jiang ◽  
Xinyue Guo ◽  
Yang Cao ◽  
Hongbing Ji
Keyword(s):  
Water Chemistry ◽  
Carbon Isotopes ◽  
North China ◽  
Inorganic Carbon ◽  
Dissolved Inorganic Carbon ◽  
Beijing China

Dual isotopes of nitrate (15N and 18O) and carbon isotopes of dissolved inorganic carbon (13C) together with water chemistry were used to identify the sources and fate of nitrate in the upper stream of Chaobai River, north China.

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