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1.
Badreddine Barhoumi Karyn LeMenach Marie-Hélène Dévier Yassine El megdiche Bechir Hammami Walid Ben Ameur Sihem Ben Hassine Jérôme Cachot Hélène Budzinski Mohamed Ridha Driss 《Environmental science and pollution research international》2014,21(10):6290-6302
Polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCPs) were determined in 18 surface sediment samples collected from Bizerte lagoon, Tunisia. The total concentrations of ten PCBs (∑PCBs) and of four OCPs (∑OCPs) in the sediments from this area ranged from 0.8 to 14.6 ng g?1 dw (average value, 3.9 ng g?1 dw) and from 1.1 to 14.0 ng g?1 dw (average value, 3.3 ng g?1 dw), respectively. Among the OCPs, the range of concentrations of dichlorodiphenyltrichloroethane and its metabolites (DDTs) and hexachlorobenzene (HCB) were 0.3–11.5 ng g?1 dw (1.9 ng g?1 dw) and 0.6–2.5 ng g?1 dw (1.4 ng g?1 dw), respectively. Compositional analyses of the POPs indicated that PCB 153, 138 and 180 were the predominant congeners accounting for 60 % of the total PCBs. In addition, p,p′-DDT was found to be the dominant DDTs, demonstrating recent inputs in the environment. Compared with some other regions of the world, the Bizerte lagoon exhibited low levels of PCBs and moderate levels of HCB and DDTs. The high ratios ΣPCBs/ΣDDTs indicated predominant industrial versus agricultural activities in this area. According to the established guidelines for sediment quality, the risk of adverse biological effects from such levels of OCPs and PCBs, as recorded at most of the study sites, was insignificant. However, the higher concentrations in stations S1 and S3 could cause biological damage. 相似文献
2.
Badreddine Sellami Hela Louati Mohamed Dellali Patricia Aissa Ezzeddine Mahmoudi Ana Varela Coelho David Sheehan 《Environmental science and pollution research international》2014,21(6):4461-4472
The effects of permethrin (PER) on a panel of antoxidant enzymes; superoxide dismutase (SOD), catalase (CAT) and glutathione S-transferase (GST) and indices of protein oxidation status (carbonylation and free thiols) were determined in digestive gland and gills of the clam Ruditapes decussatus. Animals were exposed to 100 ppb PER for 2 days. These enzyme activities increased significantly in digestive gland (p?<?0.05) after PER treatment and oxidative modification of proteins was detected in both gill and digestive gland extracts using redox proteomics. PER exposure significantly reduced the amount of protein free thiol groups in digestive gland rather than in gill, when compared to controls. Conversely, digestive gland showed significantly higher levels of carbonylated proteins than gill after PER exposure. Some proteins were successfully identified by mass spectrometry of tryptic peptides. Our data suggest that digestive gland of R. decussatus can be used as a model tissue for investigating environmental risk of PER contamination. 相似文献
3.
Badreddine Barhoumi Karyn LeMenach Marie-Hélène Devier Walid Ben Ameur Henry Etcheber Hélène Budzinski Jérôme Cachot Mohamed Ridha Driss 《Environmental monitoring and assessment》2014,186(5):2653-2669
To assess the status of polycyclic aromatic hydrocarbon (PAH) contamination in sediments from the Bizerte Lagoon (northern Tunisia), 18 surface sediment samples were collected in March 2011 and analyzed for 14 US Environmental Protection Agency priority PAHs by high-performance liquid chromatography. The total concentrations of the 14 PAHs (ΣPAHs) ranged from 16.9 to 394.1 ng g?1 dry weight (dw) with a mean concentration of 85.5 ng g?1 dw. Compared with other lagoons, coasts, and bays in the world, the concentrations of PAHs in surface sediments of the Bizerte Lagoon are low to moderate. The PAHs’ composition pattern was dominated by the presence of four-ring PAHs (45.8 %) followed by five-ring (26.8 %) and three-ring PAHs (12.7 %). The PAH source analysis suggested that the main origin of PAHs in the sediments of the lagoon was mainly from pyrolytic sources. According to the numerical effect-based sediment quality guidelines of the USA, the levels of PAHs in the Bizerte Lagoon should not exert adverse biological effects. The total benzo[a]pyrene toxicity equivalent values calculated for the samples varied from 3.1 to 53.7 ng g?1 dw with an average of 10.6 ng g?1 dw. 相似文献
4.
Ayari Jamel Barbieri Maurizio Agnan Yannick Sellami Ahmed Braham Ahmed Dhaha Faouzi Charef Abdelkarim 《Environmental geochemistry and health》2021,43(10):4027-4042
Environmental Geochemistry and Health - High-quality and accurate environmental investigations are essential for the evaluation of contamination and subsequent decision-making processes. A... 相似文献
5.
Abdelhafidh Khazri Ali Mezni Badreddine Sellami Samir Touaylia Ichrak Noiyri Hamouda Beyrem 《Chemistry and Ecology》2013,29(9):825-834
ABSTRACTCadmium (Cd) is a toxic-heavy metal that induces a wide range of behavioural, biochemical and physiological effects in aquatic organisms. Oxidative damage has been proposed as a possible mechanism involved in cadmium toxicity. The current study was carried out to evaluate the antioxidant activity of Spirulina as feed additive (1?mg/L) against the toxicity of cadmium (Cd) 0.5?mg/L in freshwater mussel Unio ravoisieri. At the end of the exposed period of 4 days, digestive gland antioxidant status Superoxide dismutase, Catalase, Glutathione-S-transferase and damage markers such as Malondialdehyde and Protein carbonyl were determined. Associations between biomarkers were assessed by a multivariate analysis technique, principal component analysis (PCA). The results of this study revealed that digestive gland antioxidant status showed a significant decrease when mussels were exposed to Cd. Superoxide dismutase, Catalase and Glutathione-S-transferase activities in the Cd?+?SP group were significantly higher than the Cd group (p 0.05). Tissue levels of malondialdehyde and protein carbonyl in the Cd?+?SP group were significantly lower than the Cd group (P?0.05). Our results show that the pretreatment with Spirulina protects the mussel from Cadmium-induced tissue damage by its antioxidant properties. 相似文献
6.
Bow tie diagrams have become a popular method for risk analysis and safety management. This tool describes the whole scenario of a given risk graphically, and proposes preventive and protective barriers to reduce, respectively, its occurrence and its severity. The weakness of bow tie diagrams is that they are restricted to a graphical representation of different scenarios exclusively designed by experts that ignore the dynamic aspect of real systems. Thus, constructing bow tie diagrams in an automatic and dynamic way remains a real challenge. This paper proposes a new Bayesian approach to construct bow tie diagrams from real data and improve them by adding a new numerical that enables us to implement the appropriate preventive and protective barriers in a dynamic manner. 相似文献
7.
Sellami Badreddine Mouhamed Dellali Ezzeddine Mahmoudi David Sheehan Beyrem Hamouda 《Chemistry and Ecology》2017,33(4):309-324
Mediterranean mussels Mytilus galloprovincialis is among the most widely used bioindicators, and anthracene (AN) is one of the most commonly found hydrocarbons in the aquatic environment. M. galloprovincialis were exposed to nominal concentrations of 0.05, 0.15 and 0.4?μg/L AN. Chemical analysis using high-performance liquid chromatography revealed the uptake of AN in the whole soft body and digestive gland at different amounts. After a short exposure (2, 4 and 8 days), the results revealed that AN induced malondialdehyde (MDA), glutathione (GSH) and acetylcholinesterase (AChE) activity in digestive gland. Our findings demonstrated also that AN reduced the filtration rates in a concentration-dependent manner. Increase in lipid peroxidation (MDA content) in digestive gland (p?.05) can possibly indicate that AN can cross the membrane barrier, leading to cellular membrane alteration. Decrease in GSH content following the concentration and exposure time support MDA content result. AN exposure significantly reduced AChE activity as a more sensitive biomarker in digestive gland in a time- and concentration-dependent manner. This review provides a framework for the understanding of toxicological effects of AN under an environmental point of view. It provides also original data on the distribution of AN in M. galloprovincialis, where digestive gland constitutes a valuable organ for investigating AN biotransformation and toxicity. 相似文献
8.
Walid Ben Ameur Souad Trabelsi Yassine El Megdiche Sihem Ben Hassine Badreddine Barhoumi Bèchir Hammami Ethel Eljarrat Damia Barceló Mohamed Ridha Driss 《Chemosphere》2013,90(9):2372-2380
Concentrations of polychlorinated biphenyls (PCBs), and organochlorine pesticides (OCPs) were determined in two fish species, mullet (Mugil cephalus) and sea bass (Dicentrarchus labrax), collected from Bizerte Lagoon and the Mediterranean Sea. In all samples, PCBs were found in higher concentrations than OCPs. The highest concentrations of OCPs and PCBs were found in sea bass, and in Bizerte Lagoon. Concentrations of DDTs and PCBs detected in this study were generally comparable or slightly higher than those found in studies from other Mediterranean and non-Mediterranean regions subject to a high anthropogenic impact. ∑PCBs, ∑HCHs and HCB levels were negatively correlated with lipid content, while no such correlation was seen for ∑DDTs. A significant correlation between levels and length and between levels and weight existed only for ∑PCBs. The daily intake of PCBs and OCPs ingested by people living in Bizerte through the studied fish species was estimated and compared with those observed in other areas. 相似文献
9.
Amine Mezni Samir Alghool Badreddine Sellami Nesrine Ben Saber Tariq Altalhi 《Chemistry and Ecology》2018,34(3):288-299
Little information is available on the potential ecotoxicity of nanomaterials in the marine environment. In particular, the aquatic ecotoxicity impact of titanium dioxide (TiO2) has been rarely reported. To carefully address this issue, we report on the synthesis of TiO2 NPs using solvothermal process. The structure and morphology of the prepared TiO2 nanoparticles were characterised using different techniques. To study the potential ecotoxicity effect of TiO2, antioxidant system of mediterranean bivalves (Mytilus galloprovincialis) was used, measuring three oxidative biomarkers (ROS production, SOD activity and GSH/GSSG level). No considerable effect was found in the digestive glands of any of the groups treated with TiO2 with concentration gradients ranging from 1 to 100?mg/L. Thus, the level of the superoxide anion, the activity of an antioxidant enzyme superoxide dismutase (SOD) and the GSH/GSSG ratio showed no significantly differences in digestive glands of all treated groups compared to the control. However, slight modifications were observed in the gills at high concentrations. These results demonstrated that TiO2 appears to exert little toxicity on marine mussels after a short-term exposure at high concentration. However, before considering the use of this nanomaterial in various applications, further complementary studies are required in order to ensure the environmental safety of these NPs. 相似文献
10.
Badreddine Barhoumi Soufiane Jouili Anis Elbarhoumi Abdelkader Derouiche Yassine El Megdiche Sondes Bouabdallah 《Chemistry and Ecology》2016,32(9):884-897
Organochlorines (including organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs)) were analysed in 10 surface sediment samples collected from the Bahiret el Bibane lagoon, which is one of the most productive lagoons and one of the most important active commercial fish traps in the southern Tunisia. The aim was to obtain information concerning the recent deposition of these compounds in this area, together with the levels, the distribution and any potential biological risk. Total concentrations of OCPs and PCBs in the sediments ranged from below the limit of detection (?1 and from 29.5 to 88.2?ng?g?1?dw, respectively. The spatial distribution of PCBs suggested that the sources of these contaminants are probably located outside the lagoon and are transported by water currents and atmospheric deposition. Compared with some other regions of the world, the Bahiret el Bibane lagoon exhibited low to moderate levels of PCBs and OCPs. According to established sediment quality guidelines, PCBs and Lindane at most of the study sites would be more concerned for the ecotoxicological risk in the Bahiret el Bibane lagoon. The results of this study could provide a useful aid for the sustainable marine management of the region. 相似文献