scholarly journals Mitigating Impact of Devils Lake Flooding on the Sheyenne River Sulfate Concentration

2020 ◽  
Vol 56 (2) ◽  
pp. 297-309
Author(s):  
Afshin Shabani ◽  
Xiaodong Zhang ◽  
Xuefeng Chu ◽  
Timothy P. Dodd ◽  
Haochi Zheng
Keyword(s):  
Sulfate Concentration ◽  
Devils Lake

Biological sulfate removal in an acidogenic bioreactor with an ultrafiltration membrane system

1998 ◽  
Vol 38 (4-5) ◽  
pp. 513-520 ◽  
Author(s):  
O. Mizuno ◽  
H. Takagi ◽  
T. Noike
Keyword(s):  
Sulfate Reduction ◽  
Membrane Filtration ◽  
Membrane Bioreactor ◽  
Volatile Fatty Acids ◽  
Membrane System ◽  
Organic Substrate ◽  
Ultrafiltration Membrane ◽  
Sulfate Concentration ◽  
Sulfate Removal ◽  
Chemostat Reactor

The biological sulfate removal in the acidogenic bioreactor with an ultrafiltration membrane system was investigated at 35°C. Sucrose was used as the sole organic substrate. The sulfate concentration in the substrate ranged from 0 to 600mgS·1−1. The chemostat reactor was operated to compare with the membrane bioreactor. The fouling phenomenon caused by FeS precipitate was observed at higher concentration of sulfate. However, it was possible to continuously operate the membrane bioreactor by cleaning the membrane. The efficiency of sulfate removal by sulfate reduction reached about 100% in the membrane bioreactor, and 55 to 87% of sulfide was removed from the permeate by the membrane filtration. The composition of the metabolite was remarkably changed by the change in sulfate concentration. When the sulfate concentration increased, acetate and 2-proponol significantly increased while n-butyrate and 3-pentanol decreased. The sulfate-reducing bacteria play the role as acetogenic bacteria consuming volatile fatty acids and alcohols as electron donors under sulfate-rich conditions. The results show that the acidogenesis and sulfate reduction simultaneously proceed in the membrane bioreactor.

High urinary sulfate concentration is associated with reduced risk of renal disease progression in type 2 diabetes

Nitric Oxide ◽  
2016 ◽  
Vol 55-56 ◽  
pp. 18-24 ◽  
Author(s):  
Joost C. van den Born ◽  
Anne-Roos S. Frenay ◽  
Stephan J.L. Bakker ◽  
Andreas Pasch ◽  
Jan-Luuk Hillebrands ◽  
...  
Keyword(s):  
Type 2 Diabetes ◽  
Renal Disease ◽  
Disease Progression ◽  
Sulfate Concentration ◽  
Renal Disease Progression ◽  
Reduced Risk

Survival to hatching of fishes in sulfate-saline waters, Devils Lake, North Dakota

1995 ◽  
Vol 52 (3) ◽  
pp. 464-469 ◽  
Author(s):  
Todd M. Koel ◽  
John J. Peterka
Keyword(s):  
North Dakota ◽  
Sodium Sulfate ◽  
Yellow Perch ◽  
Hatching Success ◽  
Perca Flavescens ◽  
White Sucker ◽  
Catostomus Commersoni ◽  
Devils Lake ◽  
Common Carp Cyprinus Carpio ◽  
Species Survival

Laboratory-based bioassays were conducted to determine concentrations of sodium-sulfate type salinities that limit the hatching success of several fish species. Survival to hatching (SH) was significantly lower (P < 0.05) in sodium-sulfate type waters from Devils Lake, North Dakota, of ≥ 2400 mg/L total dissolved solids (TDS) than in fresh water of 200 mg/L. In waters of 200, 1150, 2400, 4250, and 6350 mg/L TDS, walleye (Stizostedion vitreum) SH was 41, 38, 7, 1, and 0%; northern pike (Esox lucius) SH was 92, 68, 33, 2, and 0%; yellow perch (Perca flavescens) SH was 88, 70, 73, 0, and 0%; white sucker (Catostomus commersoni) SH was 87, 95, 66, 0, and 0%; common carp (Cyprinus carpio) SH was 71, 69, 49, 63, and 25%.

Combined effects of sulfate attack under drying–wetting cycles and loading on the fatigue behavior of concrete

2021 ◽  
pp. 136943322110427
Author(s):  
Ping Zhang ◽  
Song Ren ◽  
Yunfeng Zhao ◽  
Le Wang ◽  
Nengzeng Long ◽  
...  
Keyword(s):  
Elastic Modulus ◽  
Sodium Sulfate ◽  
Fatigue Behavior ◽  
Residual Deformation ◽  
Fatigue Loading ◽  
Damage Variable ◽  
Fatigue Properties ◽  
Sulfate Concentration ◽  
Cycle Number ◽  
Major Cycle

Concrete structures often undergo both fatigue loading and environmental impacts during their useful lifetime. This study aims to explore the fatigue properties of concrete subjected to sulfate attacks under drying–wetting cycles and loading. The coupled influences of major cycle number and sodium sulfate solution on the residual deformation, elastic modulus, and damage variable were investigated by uniaxial cyclic loading tests. Moreover, the phase composition of concrete samples was examined by X-ray diffraction. Results indicate that the concrete residual deformation and damage variable could be classified into initial and stable stages, while the elastic modulus fluctuated within a certain range. The fatigue strength of concrete was found to increase with an increase in the major cycle number and sodium sulfate concentration in the early stages, whereas the fatigue performance of concrete decreased as the major cycle number and sodium sulfate concentration increased in the later stage. The degree of influence of major cycle number and sodium sulfate concentration on the fatigue properties of concrete differed in each stage. These findings can contribute to understand the variation pattern of concrete properties in complicated environments and provide an important reference for associated construction projects.

Sign in / Sign up

Export Citation Format

Share Document