scholarly journals Distribution of organic contamination of sediments from Ichkeul Lake and Bizerte Lagoon, Tunisia

2017 ◽  
Vol 123 (1-2) ◽  
pp. 329-338 ◽  
Author(s):  
Fida Ben Salem ◽  
Olfa Ben Said ◽  
Ezzeddine Mahmoudi ◽  
Robert Duran ◽  
Mathilde Monperrus
Keyword(s):  
Bizerte Lagoon ◽  
Organic Contamination ◽  
Ichkeul Lake

scholarly journals Bacterial community assemblages in sediments under high anthropogenic pressure at Ichkeul Lake/Bizerte Lagoon hydrological system, Tunisia

2019 ◽  
Vol 252 ◽  
pp. 644-656
Author(s):  
Fida Ben Salem ◽  
Olfa Ben Said ◽  
Cristiana Cravo-Laureau ◽  
Ezzeddine Mahmoudi ◽  
Noëlle Bru ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Anthropogenic Pressure ◽  
Bizerte Lagoon ◽  
Ichkeul Lake ◽  
Hydrological System ◽  
Community Assemblages

FLUORESCENCE EVALUATION OF DRINKING WATER ORGANIC CONTAMINATION

2010 ◽  
Vol 9 (11) ◽  
pp. 1497-1501
Author(s):  
Luminita Ghervase ◽  
Elfrida M. Carstea ◽  
Dan Savastru ◽  
Gabriela Pavelescu
Keyword(s):  
Drinking Water ◽  
Organic Contamination

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.

Zebra Mussels as Biomonitors for Organic Contaminants in the Lower Great Lakes

1996 ◽  
Vol 31 (2) ◽  
pp. 411-432 ◽  
Author(s):  
Michael E. Comba ◽  
Janice L. Metcalfe-Smith ◽  
Klaus L.E. Kaiser
Keyword(s):  
Great Lakes ◽  
Organic Contaminants ◽  
Lake Erie ◽  
Soft Tissues ◽  
Lake Ontario ◽  
Dry Weight ◽  
Zebra Mussels ◽  
Organic Contamination ◽  
Contamination Levels ◽  
St Lawrence River

Abstract Zebra mussels were collected from 24 sites in Lake Erie, Lake Ontario and the St. Lawrence River between 1990 and 1992. Composite samples of whole mussels (15 sites) or soft tissues (9 sites) were analyzed for residues of organochlo-rine pesticides and PCBs to evaluate zebra mussels as biomonitors for organic contaminants. Mussels from most sites contained measurable quantities of most of the analytes. Mean concentrations were (in ng/g, whole mussel dry weight basis) 154 ΣPCB, 8.4 ΣDDT, 3.5 Σchlordane, 3.4 Σaldrin, 1.4 ΣBHC, 1.0 Σendosulfan, 0.80 mirex and 0.40 Σchlorobenzene. Concentrations varied greatly between sites, i.e., from 22 to 497 ng/g for ΣPCB and from 0.08 to 11.6 ng/g for ΣBHC, an indication that mussels are sensitive to different levels of contamination. Levels of ΣPCB and Σendosulfan were highest in mussels from the St. Lawrence River, whereas mirex was highest in those from Lake Ontario. Overall, mussels from Lake Erie were the least contaminated. These observations agree well with the spatial contaminant trends shown by other biomoni-toring programs. PCB congener class profiles in zebra mussels are also typical for nearby industrial sources, e.g., mussels below an aluminum casting plant contained 55% di-, tri- and tetrachlorobiphenyls versus 31% in those upstream. We propose the use of zebra mussels as biomonitors of organic contamination in the Great Lakes.

Factors Affecting Bioconcentration of Trace Organic Contamination in Waters

1989 ◽  
Vol 21 (2) ◽  
pp. 147-150 ◽  
Author(s):  
D. W. Hawker ◽  
D. W. Connell
Keyword(s):  
Molecular Weight ◽  
Bioconcentration Factor ◽  
Aqueous Solubility ◽  
Organic Chemicals ◽  
Organic Contamination ◽  
Hydrophobic Organic Chemicals ◽  
Factors Affecting ◽  
Water Partition Coefficient ◽  
Physicochemical Factors ◽  
Trace Organic

The influence of some important biological and physicochemical factors on the bioconcentration of hydrophobic organic chemicals is outlined. For non-ionizable, persistent compounds the bioconcentration factor can be related to a compound's octanol/water partition coefficient, aqueous solubility and molecular weight, while the lipid content of an organism also affects the bioconcentration potential of these compounds. The effect of ionization and biodegradation of organic chemicals on bioconcentration is also discussed.

Organic contamination detection for isotopic analysis of water by laser spectroscopy

2021 ◽  
Author(s):  
Cody Millar ◽  
Kim Janzen ◽  
Magali F. Nehemy ◽  
Geoff Koehler ◽  
Pedro Hervé‐Fernández ◽  
...  
Keyword(s):  
Laser Spectroscopy ◽  
Isotopic Analysis ◽  
Organic Contamination

Polybrominated diphenyl ethers and their methoxylated analogs in mullet (Mugil cephalus) and sea bass (Dicentrarchus labrax) from Bizerte Lagoon, Tunisia

2011 ◽  
Vol 72 (5) ◽  
pp. 258-264 ◽  
Author(s):  
Walid Ben Ameur ◽  
Sihem Ben Hassine ◽  
Ethel Eljarrat ◽  
Yassine El Megdiche ◽  
Souad Trabelsi ◽  
...  
Keyword(s):  
Polybrominated Diphenyl Ethers ◽  
Dicentrarchus Labrax ◽  
Sea Bass ◽  
Mugil Cephalus ◽  
Bizerte Lagoon ◽  
Diphenyl Ethers

Discoloration at anatase titanium dioxide surfaces by organic contamination

2007 ◽  
Vol 21 (4) ◽  
pp. 101-102 ◽  
Author(s):  
W. Clark ◽  
P. Broadhead
Keyword(s):  
Titanium Dioxide ◽  
Organic Contamination

The plankton food web of the Bizerte Lagoon (South-western Mediterranean): II. Carbon steady-state modelling using inverse analysis

2008 ◽  
Vol 79 (1) ◽  
pp. 101-113 ◽  
Author(s):  
Boutheïna Grami ◽  
Nathalie Niquil ◽  
Asma Sakka Hlaili ◽  
Michel Gosselin ◽  
Dominique Hamel ◽  
...  
Keyword(s):  
Steady State ◽  
Food Web ◽  
Inverse Analysis ◽  
Western Mediterranean ◽  
Bizerte Lagoon
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