Water Researches and Technologies Center Borj Cedria Technopark

Soliman, Tunisia

Water Researches and Technologies Center Borj Cedria Technopark

Soliman, Tunisia
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Gdara I.,Water Researches and Technologies Center Borj Cedria Technopark | Gdara I.,University of Carthage | Zrafi I.,Water Researches and Technologies Center Borj Cedria Technopark | Balducci C.,CNR Institute of Atmospheric Pollution Research | And 2 more authors.
Archives of Environmental Contamination and Toxicology | Year: 2017

Surface sediments were collected from the Watershed of Wadi El Bey in Tunisia to evaluate the degree of polycyclic aromatic hydrocarbons (PAHs) contamination. Sediments were collected during different seasons in 14 sites that received wastes from domestic effluent, industrial discharge, and agricultural drainage wastes. Twenty-six individual PAHs were analyzed. The total PAH contents (Σ PAHs) in surface sediments showed wide variability, ranging from 6.89 ± 0.05 to 340 ± 0.1 ng g−1. The 4-, 5-, and 6-ring compounds were the most abundant PAHs detected at the majority of sites. Diagnostic concentration ratios between pairs of PAHs and molecular indices, calculated with the purpose of drawing information about pollution sources, indicated that PAHs were of both petrogenic and pyrolytic origins. Toxic contaminants concentrations were determined according to the numerical effect-based sediment quality guidelines (SQGs). PAH levels did not exceed the SQGs, indicating that PAHs seem to pose low and occasional toxicity risks. Total carcinogenicity and mutagenicity (TEQBaP and MEQBaP) ranged from 0.08 to 65 ng and from 0.02 to 135.0 ng g−1 of dry weight, respectively. Among the seven carcinogenic PAHs, BaP accounted for the majority of the potency and could potentially be used as a unique indicator of PAH toxicity. This study provides a baseline to promote environmental protection programs and pollution monitoring/control in Watershed and coastal areas. © 2017 Springer Science+Business Media, LLC


Ben Saad M.,Water Researches and Technologies Center Borj Cedria Technopark | Ben Said M.,Water Researches and Technologies Center Borj Cedria Technopark | Bousselmi L.,Water Researches and Technologies Center Borj Cedria Technopark | Ghrabi A.,Water Researches and Technologies Center Borj Cedria Technopark
Desalination and Water Treatment | Year: 2016

The main goal of the present study was to enhance the rhizobacterium potential in horizontal subsurface flow constructed wetland system planted by Phragmites australis using biotechnology. The bioinoculation of denitrifier promoting rhizobacteria fluorescent Pseudomonas spp. has been used to confer higher rhizosphere competence by environmentally friendly biological approaches. In order to study the behaviour or the denitrifying potential of the inoculated bacteria ex situ and in situ, the models of Chick–Watson and Series-Event were used with modifications. The comparison of kinetic parameters: (k): the denitrifying coefficient (h−1) and the denitrifying rate at the first contact with a determined concentration of nitrate (A) for different bioassays has shown that the application of the bioinoculation increases remarkably the efficiency of the water treatment system for the reduction of nitrates even by an individual bioinoculated bacterium. © 2016 Balaban Desalination Publications. All rights reserved.


Lassaad M.,Water Researches and Technologies Center Borj Cedria Technopark | Mohamed B.A.,Water Researches and Technologies Center Borj Cedria Technopark
International Journal of Greenhouse Gas Control | Year: 2015

In the present work the absorption of carbon dioxide in aqueous solution with Stipa tenacissima fibers has been studied in a stirred cell at 298K. The obtained experimental results show successful elimination of CO2(96%)through hydration of neutral aqueous CO2 molecules to HCO3- species by S. tenacissima fibers. This reactivity has been accompanied by a disorder at the surface morphology and a reduction in crystallinity % of cellulose results of the modification in hydrogen bonds. During the characterization Fourier Transform Infrared Spectroscopy (FTIR), X-ray diffraction (XRD), and scanning electron microscopy (SEM) were employed to investigate the structural and morphological changes in S. tenacissima fibers. © 2015 Elsevier Ltd.

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