Microbial controls on arsenic release and mitigation in aquifer sediments

2016 ◽  
pp. 99-100
Author(s):  
J Lloyd
Keyword(s):  
Aquifer Sediments

The Distribution of Volatile Organics in a Leachate Plume, Gloucester, Ontario

1987 ◽  
Vol 22 (1) ◽  
pp. 49-64 ◽  
Author(s):  
J.F. Devlin ◽  
W.A. Gorman
Keyword(s):  
Organic Contaminants ◽  
Source Area ◽  
Unconfined Aquifer ◽  
High Concentration ◽  
Organic Contamination ◽  
Aquifer System ◽  
Aquifer Systems ◽  
Volatile Organic ◽  
Volatile Organic Contaminants ◽  
Aquifer Sediments

Abstract The Gloucester Landfill is located near Ottawa, Ontario, on a northeast trending ridge of Quaternary age. The ridge comprises outwash sediments which make up two aquifer systems. A confined system exists next to bedrock, and is overlain by a silty-clayey stratum (the confining layer) which is, in turn, overlain by an unconfined aquifer system. Two independent volatile organic plumes have previously been identified at the landfill: the southeast plume, which has penetrated the confined aquifer system, and the northeast plume which is migrating in the unconfined aquifer. The distribution of volatile organic contaminants at the northeast plume site appears to be a function of two factors: (1) heterogeneities in the aquifer sediments are causing the channeling of contaminants through a narrow path; (2) the low fraction of organic carbon in the unconfined aquifer sediments at the northeast site is resulting in little retardation of the contaminants there, relative to those at the southeast site. Acetate was the only volatile fatty acid detected in the leachate. It was measurable only in areas where the volatile organic contamination was significant. Although methane was detected in the contaminated sediments, suggesting that microbial activity was present, the high concentration of acetate (>1000 ppm) which was detected down-gradient from the source area indicates that any biodegradation which is occurring is proceeding at a very slow rate.

MOBILIZATION OF NATURALLY OCCURRING URANIUM FOLLOWING THE INFLUX OF NITRATE INTO AQUIFER SEDIMENTS

2018 ◽  
Author(s):  
Jeffrey P. Westrop ◽  
◽  
P.J. Nolan ◽  
Olivia M. Healy ◽  
Sharon Bone ◽  
...  
Keyword(s):  
Naturally Occurring ◽  
Aquifer Sediments

Atrazine mineralization potential of alluvial-aquifer sediments under aerobic conditions

1992 ◽  
Vol 26 (8) ◽  
pp. 1556-1559 ◽  
Author(s):  
Peter B. McMahon ◽  
Francis H. Chapelle ◽  
Martha L. Jagucki
Keyword(s):  
Alluvial Aquifer ◽  
Aerobic Conditions ◽  
Mineralization Potential ◽  
Aquifer Sediments

Ex situ groundwater treatment triggering the mobilization of geogenic uranium from aquifer sediments

2017 ◽  
Vol 587-588 ◽  
pp. 371-380 ◽  
Author(s):  
Andre Banning ◽  
Nadine Pawletko ◽  
Julia Röder ◽  
Christine Kübeck ◽  
Frank Wisotzky
Keyword(s):  
Ex Situ ◽  
Groundwater Treatment ◽  
Aquifer Sediments

Release of trace elements from sandy aquifer sediments controlled by artificial recharge

2020 ◽  
pp. 191-192
Author(s):  
F. Larsen ◽  
I. Poulsen ◽  
L. Frederiksen ◽  
H.O. Hansen ◽  
J. Jochimsen
Keyword(s):  
Trace Elements ◽  
Artificial Recharge ◽  
Sandy Aquifer ◽  
Aquifer Sediments

Aerobic biodegradation of vinyl chloride and cis-1,2-dichloroethylene in aquifer sediments

Chemosphere ◽  
2005 ◽  
Vol 60 (11) ◽  
pp. 1555-1564 ◽  
Author(s):  
Kim Broholm ◽  
Liselotte Ludvigsen ◽  
Thorkild Feldthusen Jensen ◽  
Henrik Østergaard
Keyword(s):  
Vinyl Chloride ◽  
Aerobic Biodegradation ◽  
Aquifer Sediments
Sign in / Sign up

Export Citation Format

Share Document