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Rouibah Ikram Hassen Wafa Sallem Ons Fekih Khellaf Nabila Hassen Abdennaceur Mansour Hedi Ben 《Environmental science and pollution research international》2021,28(12):14530-14545
Environmental Science and Pollution Research - Medicines and drugs consumption by all populations of the world can be expected to result in the contamination of the environment since 30–90%... 相似文献
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Nejla Hechmi Nadhira Ben Aissa Hassen Abdenaceur Naceur Jedidi 《Environmental science and pollution research international》2014,21(2):1304-1313
Pot-culture experiments were conducted to evaluate the phytoremediation potential of a wetland plant species, Phragmites australis in cadmium (Cd) and pentachlorophenol (PCP) co-contaminated soil under glasshouse conditions for 70 days. The treatments included Cd (0, 5 and 50 mg kg?1) without or with PCP (50 and 250 mg kg?1). The results showed that growth of P. australis was significantly influenced by interaction of Cd and PCP, decreasing with either Cd or PCP additions. Plant biomass was inhibited and reduced by the rate of 89 and 92 % in the low and high Cd treatments and by 20 and 40 % in the low and high PCP treatments compared to the control. The mixture of low Cd and low PCP lessened Cd toxicity to plants, resulting in improved plant growth (by 144 %). Under the joint stress of the two contaminants, the ability of Cd uptake and translocation by P. australis was weak, and the BF and TF values were inferior to 1.0. A low proportion of the metal is found aboveground in comparison to roots, indicating a restriction on transport upwards and an excluding effect on Cd uptake. Thus, P. australis cannot be useful for phytoextraction. The removal rate of PCP increased significantly (70 %) in planted soil. Significant positive correlations were found between the DHA and the removal of PCP in planted soils which implied that plant root exudates promote the rhizosphere microorganisms and enzyme activity, thereby improving biodegradation of PCP. Based on results, P. australis cannot be effective for phytoremediation of soil co-contaminated with Cd and PCP. Further, high levels of pollutant hamper and eventually inhibit plant growth. Therefore, developing supplementary methods (e.g. exploring the partnership of plant–microbe) for either enhancing (phytoextraction) or reducing the bioavailability of contaminants in the rhizosphere (phytostabilization) as well as plant growth promoting could significantly improve the process of phytoremediation in co-contaminated soil. 相似文献
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Wafa Feki-Sahnoun Asma Hamza Mabrouka Mahfoudi Ahmed Rebai Malika Bel Hassen 《Environmental science and pollution research international》2014,21(19):11481-11499
Microphytoplankton data along the southern Tunisian coasts have been monitored weekly since 1995. This study used the data collected during the period 2000–2007 to determine the temporal variability patterns and to characterize the geographical structures of microphytoplankton populations. The methodological approach consisted in isolating the temporal variability common to all sampled sites and in analyzing the “residual” site-specific component. Multivariate ordination methods were used to determine the seasonal and interannual variability. The temporal pattern shared by all sites was highlighted and the seasonal cycle of the most frequent phytoplankton communities contrasted the diatoms winter-spring species to the dinoflagellates summer-fall species. Multitable comparison allowed the identification of three areas exhibiting similar phytoplankton population variability. The results, despite the coastal location of sampling sites, indicated that hydrodynamic and geomorphologic properties of the different areas as well as anthropogenic activities play a key role in the structure of the phytoplankton communities. 相似文献
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Intissar Grissa Sabrine Guezguez Lobna Ezzi Sana Chakroun Amira Sallem Emna Kerkeni Jaber Elghoul Lassaad El Mir Meriem Mehdi Hassen ben Cheikh Zohra Haouas 《Environmental science and pollution research international》2016,23(20):20205-20213
Titanium dioxide nanoparticles (TiO2 NPs) are widely used for their whiteness and opacity in several applications such as food colorants, drug additives, biomedical ceramic, and implanted biomaterials. Research on the neurobiological response to orally administered TiO2 NPs is still limited. In our study, we investigate the effects of anatase TiO2 NPs on the brain of Wistar rats after oral intake. After daily intragastric administration of anatase TiO2 NPs (5–10 nm) at 0, 50, 100, and 200 mg/kg body weight (BW) for 60 days, the coefficient of the brain, acethylcholinesterase (AChE) activities, the level of interleukin 6 (IL-6), and the expression of glial fibrillary acidic protein (GFAP) were assessed to quantify the brain damage. The results showed that high-dose anatase TiO2 NPs could induce a downregulated level of AChE activities and showed an increase in plasmatic IL-6 level as compared to the control group accompanied by a dose-dependent decrease inter-doses, associated to an increase in the cerebral IL-6 level as a response to a local inflammation in brain. Furthermore, we observed elevated levels of immunoreactivity to GFAP in rat cerebral cortex. We concluded that oral intake of anatase TiO2 NPs can induce neuroinflammation and could be neurotoxic and hazardous to health. 相似文献
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Ayed-Boussema I Rjiba K Moussa A Mnasri N Bacha H 《Environmental science and pollution research international》2012,19(2):458-466
Background and aims
Because of the widespread use of pesticides for domestic and industrial applications, the evaluation of their toxic effects is of major concern to public health. The aim of the present study was to investigate the propensity of dimethoate (DM), an organophosphorus pesticide, to cause oxidative damage in the liver and kidney of mice and its associated genotoxic effect. 相似文献8.
D W Fitzpatrick L D Arbuckle A M Hassen 《Journal of environmental science and health. Part. B》1988,23(4):343-354
Young female rats were orally dosed with either 1 or 100 mg zearalenone kg-1 body weight; zearalenone and metabolites were measured in a 96-h collection of urine and feces by HPLC analysis. Dose had little effect on metabolites formed, or excretion route. In both treatment groups, about 55% of the oral dose was excreted in the feces, while the urine was also a major route of excretion accounting for 15-20% of the administered dose. Zearalenone and metabolites were excreted mainly in the free form, with the production of alpha-zearalenol, the most potent estrogenic metabolite, being greater than 10% of the zearalenone dose. 相似文献
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Mounaouer Brahmi Noureddine Hamed Belhadi Helmi Hamdi Abdennaceur Hassen 《环境科学学报(英文版)》2010,22(8):1218-1224
This work aimed to study UV-resistant strains of Pseudomonas aeruginosa, to propose a formulation of the kinetics of secondary
treated wastewater disinfection and to underline the influence of suspended solids on the inactivation kinetics of these strains. Some
investigations were carried out for the validation of some simulation models, from the simplest, the kinetics model of Chick-Watson
reduced to first order, to rather complex models such as multi-kinetic and Collins-Selleck models. Results revealed that the involved
processes of UV irradiation were too complex to be approached by a simplified formulation, even in the case of specific strains of
microorganisms and the use of nearly constant UV radiation intensity. In fact, the application of Chick-Watson model in its original
form is not representative of the kinetics of UV disinfection. Modification, taking into account the speed change during the disinfection
process, has not significantly improved results. On the other hand, the application of Collins-Selleck model demonstrates that it was
necessary to exceed a least dose of critical radiation to start the process of inactivation. To better explain the process of inactivation,
we have assumed that the action of disinfectant on the survival of lonely microorganisms is faster than its action on suspended solids
protected or agglomerated to each others. We can assume in this case the existence of two inactivation kinetics during the processes
(parallel and independent) of the first-order. For this reason, the application of a new kinetic model by introducing a third factor
reflecting the influence of suspended solids in water on disinfection kinetics appeared to be determinant for modeling UV inactivation
of P. aeruginosa in secondary treated wastewater. 相似文献
10.
Soulwène Kouki Neila Saidi Fadhel M''hiri Houda Nasr Hanène Cherif Hadda Ouzari Abdennaceur Hassen 《环境科学学报(英文版)》2011,23(10):1699-1708
Autotrophic ammonia-oxidizing bacteria (AOB) have been widely studied in constructed wetlands systems, while mixotrophic AOB have been less thoroughly examined. Heterotrophic bacteria were isolated from wastewater and rhizospheres of macrophytes of constructed wetlands, and then cultivated in a mixotrophic medium containing ammonium and acetic acid. A molecular characterization was accomplished using ITS-PCR amplification, and phylogenetic analysis based on 16S rRNA gene sequences. Results showed the presence of 35 bacteria, among 400 initially heterotrophic isolates, that were able to remove ammonia. These 35 isolates were classified into 10 genetically different groups based on ITS pattern. Then, a collection of 10 isolates were selected because of their relatively high ammonia removal efficiencies (ARE ≥ 80%) and their phylogenetic diversity. In conditions of mixotrophy, these strains were shown to be able to grow (increase of optical density OD660 during incubation with assimilation of nitrogen into cellular biomass) and to oxidize ammonia (important ammonia oxidation efficiencies, AOE between 79% and 87%). Among these facultative mixotrophic AOB, four isolates were genetically related to Firmicutes (Bacillus and Exiguobacterium), three isolates were affiliated to Actinobacteria (Arthrobacter) and three other isolates were associated with Proteobacteria (Pseudomonas, Ochrobactrum and Bordetella). 相似文献