scholarly journals Evaluating the Effects of River Partial Penetration on the Occurrence of Riparian Freshwater Lenses

2021 ◽  
Author(s):  
Amir Jazayeri ◽  
Adrian Deane Werner ◽  
Huiqiang Wu ◽  
Chunhui Lu
Keyword(s):  
Partial Penetration ◽  
Freshwater Lenses

Effects of River Partial Penetration on the Occurrence of Riparian Freshwater Lenses: Experimental Investigation

2021 ◽  
Author(s):  
Amir Jazayeri ◽  
Adrian D. Werner ◽  
Huiqiang Wu ◽  
Chunhui Lu
Keyword(s):  
Experimental Investigation ◽  
Partial Penetration ◽  
Freshwater Lenses

Effects of River Partial Penetration on the Occurrence of Riparian Freshwater Lenses: Theoretical Development

2020 ◽  
Vol 56 (10) ◽  
Author(s):  
Amir Jazayeri ◽  
Adrian D. Werner ◽  
Huiqiang Wu ◽  
Chunhui Lu
Keyword(s):  
Theoretical Development ◽  
Partial Penetration ◽  
Freshwater Lenses

scholarly journals Effects of River Partial Penetration on the Occurrence of Riparian Freshwater Lenses: Experimental Investigation

2021 ◽  
Author(s):  
Amir Jazayeri ◽  
Adrian Deane Werner ◽  
Huiqiang Wu ◽  
Chunhui Lu
Keyword(s):  
Experimental Investigation ◽  
Partial Penetration ◽  
Freshwater Lenses

Prevention of porosity in deep partial penetration laser and hybrid welding with minimum solute oxygen in the weld metal

2010 ◽  
Author(s):  
Susumu Tsukamoto ◽  
Lin Zhao ◽  
Goro Arakane ◽  
Tomohiro Sugino ◽  
Koichi Yasuda
Keyword(s):  
Weld Metal ◽  
Hybrid Welding ◽  
Partial Penetration

BENDING STRENGTH OF STEEL COLUMN MEMBERS WITH PARTIAL PENETRATION GROOVE WELDED JOINTS

1994 ◽  
Vol 59 (459) ◽  
pp. 153-161
Author(s):  
Yoshitaka YABE ◽  
Shinichi SAKAMOTO ◽  
Kei YAKUSHIJI
Keyword(s):  
Welded Joints ◽  
Bending Strength ◽  
Partial Penetration ◽  
Steel Column

ANOTHER LOOK AT FRESHWATER LENSES

2018 ◽  
Author(s):  
Michael C. Sukop ◽  
◽  
Bei Wei ◽  
Santiago Castex
Keyword(s):  
Freshwater Lenses

Biological granulated activated carbon fluidized bed reactor for atrazine remediation

2004 ◽  
Vol 49 (11-12) ◽  
pp. 215-222 ◽  
Author(s):  
M. Herzberg ◽  
C.G. Dosoretz ◽  
S. Tarre ◽  
M. Beliavski ◽  
M. Green
Keyword(s):  
Fluidized Bed ◽  
Fluidized Bed Reactor ◽  
Batch Adsorption ◽  
Pseudomonas Sp ◽  
Partial Penetration ◽  
Biofilm Carrier ◽  
Degradation Rates ◽  
Degrading Bacteria ◽  
Atrazine Degradation ◽  
Granulated Activated Carbon

To show that an adsorbing biofilm carrier (GAC) can be advantageous for atrazine bioremediation over a non-adsorbing carrier, fluidized bed (FB) reactors were operated under atrazine limiting concentrations using Pseudomonas sp. strain ADP as the atrazine degrading bacteria. The following interrelated subjects were investigated: 1) atrazine adsorption to GAC under conditions of atrazine partial penetration in the biofilm, 2) differences in atrazine degradation rates and 3) stability of atrazine biodegradation under non-sterile anoxic conditions in the GAC reactor versus a reactor with a non-adsorbing biofilm carrier. Results from batch adsorption tests together with modeling best described the biofilm as patchy in nature with covered and non-biofilm covered areas. Under conditions of atrazine partial penetration in the biofilm, atrazine adsorption occurs in the non-covered areas and is consequently desorbed at the base of the biofilm substantially increasing the active biofilm surface area. The double flux of atrazine to the biofilm in the GAC reactor results in lower effluent atrazine concentrations as compared to a FB reactor with a non-adsorbing carrier. Moreover, under non-sterile denitrification conditions, atrazine degradation stability was found to be much higher (several months) using GAC as a biofilm carrier while non-adsorbing carrier reactors showed sharp deterioration within 30 days due to contamination of non-atrazine degrading bacteria.

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