safa chaabane | University Of Carthage (original) (raw)

Papers by safa chaabane

Water Science and Technology

Pressures related to urban growth and industrial activities exacerbated by climate change had an ... more Pressures related to urban growth and industrial activities exacerbated by climate change had an impact on water resources in Tunisia. The present study examines the application of cladode cactus mucilage (CCM) flocculants for hot alkaline chemical degreasing Zn-electroplating wastewater treatment and reuse (WWTR). The CCM flocculation process was selected through their environmental benefits, economic facilities, sustainable use of the natural biopolymer product, input biopolymers substitution, and on-site treated wastewater (TWW) reuse and recovery. The alum coagulation and CCM flocculation were performed by the jar test series. The suitability of treated wastewater quality (TWWQ) with alum/CCM was also assessed for reuse purpose in terms of corrosion-scaling indices (RSI, LSI, PSI, AI), oxidation-reduction potential (ORP), and microbiological community growth (Bacillus, Pseudomonas, Mesophilic bacteria and yeasts) for 28 days storage at 25 °C. The total alkalinity removal efficie...

Water resources in Africa are subjected to many pressures related to urban growth and agricultura... more Water resources in Africa are subjected to many pressures related to urban growth and agricultural expansions which will be exarcebated by climate change. These pressures jeopardise achieving the UN-Sustainable Development Goal 6 (SDG6)

Environmental science and pollution research international, Jan 26, 2016

The present study examines the suitability assessment of an upflow-downflow siliceous sand/marble... more The present study examines the suitability assessment of an upflow-downflow siliceous sand/marble waste filtration system for treatment and reuse of grey water collected from bathrooms of the student residential complex at the Higher Institute of Engineering Medjez El Bab (Tunisia). Once the optimization of grey water pre-treatment system has been determined, the filtration system was operated at different hydraulic loading rate and media filter proportions in order to assess the suitability of treated grey water for irrigational purpose according to salinity hazard, sodium hazard, magnesium hazard, permeability index, water infiltration rate, and widely used graphical methods. Suitability of the treated grey water for industrial purpose was evaluated in terms of foaming, corrosion, and scaling. Under optimal operational conditions, results reveals that treated grey water samples with an upflow-downflow siliceous sand/marble waste filtration system may be considered as a good and an...

Journal of Saudi Chemical Society, 2017

The removal of phosphates from aqueous solutions by adsorption onto date palm fibers (DPF) has be... more The removal of phosphates from aqueous solutions by adsorption onto date palm fibers (DPF) has been studied in batch mode. The aim of this study was to understand the mechanisms that govern phosphate sorption and find an appropriate model for the kinetics of removal. In order to investigate the mechanism of sorption and potential rate controlling steps, pseudo first-order, pseudo second-order, intra-particle diffusion and the Elovich equations have been used to test experimental data. Kinetic analysis of the four models has been carried out for initial phosphate concentration in the range of 30-110 mg/L. The rate constants for the four models have been determined and the correlation coefficients have been calculated in order to assess which model provides the best fit predicted data with experimental results. Seven statistical functions were used to estimate the error deviations between experimental and theoretically predicted kinetic adsorption values, including the average relative error deviation (ARED), Marquardt's percent standard error deviation (MPSED), the hybrid fractional error function (HYBRID), the sum of the squares of the errors (SSE) and three alternative statistical functions, including the Chi-square test, the F-test and Student's T-test. The results showed that, both Elovich equation and pseudo second-order equation provide the best fit to experimental data for different initial phosphate concentrations.

Youth and Water Security in Africa, 2022

Citizen Science (CS) that is applicable to Water Quality Monitoring (WQM) is considered as an inn... more Citizen Science (CS) that is applicable to Water Quality Monitoring (WQM) is considered as an innovative approach to enhancement of the efficiency of hydrosystems’ monitoring. The main objective of this study was to assess the quality of a CS-based WQM program based on water test strips for the Medjerda River, the main hydrosystem of Tunisia. The study focused on total alkalinity, nitrates and sodium chloride content. Three citizens participated in WQM with test strips, for wet and dry periods, using 96 samples collected and monitored in 12 sampling sites located in the Medjerda watershed. Regression analysis, based on Pearson Correlation Coefficient (PCC), determination coefficient (R²), F test, and Cronbach’s alpha (αc) test were performed to statistically assess the difference between the citizens’ datasets and the standard values. The results show that sodium chloride-sensitive test strips are the most reliable for measuring sodium chloride within wide range concentrations (0-7510 ppm). Nitrates-sensitive test strips are moderately reliable in the 0-25 ppm range. The total alkalinity-sensitive test strips are less reliable in the 3-20°F range concentration. Results also demonstrate a good agreement between the citizen-based outcomes and the analytical methods for the three citizens. However, the reliability depends on the citizen and the parameter to be tested. The test strips appear to be a suitable tool for WQM of the Medjerda watershed by citizens if the instructions of use are strictly followed. The latter can be achieved by a more consistent citizen training.

The potential use of Aleppo pine (Pinus halepensis Mill.), a lignocellulosic-based fiber found in... more The potential use of Aleppo pine (Pinus halepensis Mill.), a lignocellulosic-based fiber found in discontinuous bands along the Mediterranean basin, for the removal of a basic cationic dye: Methylene blue (MB) was investigated by adsorption in batch mode. In order to investigate the mechanism of dye sorption and potential rate controlling steps, pseudo first-order, pseudo second-order and intra-particle diffusion models equations have been used to test experimental data. Kinetic analysis of models has been carried out for initial MB dye concentration in the range of 20-100 mg/L. The rate constants models have been determined and the correlation coefficients have been calculated in order to assess which model provides the best fit predicted data with experimental results. The results showed that pseudo second-order equations model provide the best fit to experimental data for different initial MB dye concentrations implying that chemisorption mechanism may play an important role for ...

Advances in environmental research

Powdered marble wastes (PMW) generated by Utique marble cutting industries (North of Tunisia) wit... more Powdered marble wastes (PMW) generated by Utique marble cutting industries (North of Tunisia) with abundant amounts were used in this study as low-cost materials to investigate the stabilization of heavy metals (Pb, Zn, Fe) in sludge generated from a local Zn-Electroplating factory. Powdered marble wastes were evaluated by means of chemical fractions of heavy metals in sludge and concentrations of heavy metals in leachate from columns to determine their ability to stabilize heavy metals in contaminated sludge. Results indicated that chemical fractions of heavy metals in sludge were affected by application of the PMW mineral materials and pH, however, the effects varied with heavy metals. Application of the powdered marble wastes mineral materials reduced exchangeable metals in the sequence of Pb (60.5%)>Fe (40.5%)>Zn (30.1%). X-ray diffraction and hydro-geochemical transport code PHREEQC analysis were successfully carried out to get a better understanding of the mechanisms of reactive mineral phases involved in reduced exchangeable heavy metals in sludge after PMW material amendments. Therefore, metal immobilization using powdered marble wastes materials is an effective stabilization technique for industrial metallic hydroxide sludge.

The present study examines the suitability assessment of the water quality of Medjerda wadi (Kala... more The present study examines the suitability assessment of the water quality of Medjerda wadi (Kalaat Landalous) for irrigation purpose. The suitability for irrigation is assessed in terms of salinity hazard, sodium hazard, magnesium hazard, permeability index, water infiltration rate, Kelly Index and widely used graphical methods (Wilcox and USSL Diagram). The results of this study showed that the classification of water samples based on Percentage Sodium (%Na) and Exchangeable Sodium Percentage (ESP) versus Electrical Conductivity (EC) indicates that more than 80% of water samples were classified as doubtful based on Wilcox's plot. US salinity hazards reveal also that most water samples fall under C4-S2 (very high salinity hazard and medium sodium hazard) water class which are considered to be unsuitable quality to irrigate semi-tolerant crops.

https://irjet.net/archives/V3/i3/IRJET-V3I3171.pdf

The present study examines the suitability assessment of an upflow-downflow siliceous sand/marble... more The present study examines the suitability assessment of an upflow-downflow siliceous sand/marble waste filtration system for treatment and reuse of grey water collected from bathrooms of the student residential complex at the Higher Institute of Engineering Medjez El Bab (Tunisia). Once the optimization of grey water pre-treatment system has been determined, the filtration system was operated at different hydraulic loading rate and media filter proportions in order to assess the suitability of treated grey water for irrigational purpose according to salinity hazard, sodium hazard , magnesium hazard, permeability index, water infiltration rate, and widely used graphical methods. Suitability of the treated grey water for industrial purpose was evaluated in terms of foaming, corrosion, and scaling. Under optimal operational conditions, results reveals that treated grey water samples with an upflow-downflow siliceous sand/marble waste filtration system may be considered as a good and an excellent water quality suitable for irrigation purpose. However, treated grey water was found not appropriate for industrial purpose due to high concentrations of calcium and sodium that can generate foaming and scaling harm to boilers. These results suggest that treated grey water with an upflow-downflow siliceous sand/marble waste filtration system would support production when used as irrigation water.

The removal of phosphates from aqueous solutions by adsorption onto date palm fibers (DPF) has be... more The removal of phosphates from aqueous solutions by adsorption onto date palm fibers (DPF) has been studied in batch mode. The aim of this study was to understand the mechanisms that govern phosphate sorption and find an appropriate model for the kinetics of removal. In order to investigate the mechanism of sorption and potential rate controlling steps, pseudo first-order, pseudo second-order, intra-particle diffusion and the Elovich equations have been used to test experimental data. Kinetic analysis of the four models has been carried out for initial phosphate concentration in the range of 30–110 mg/L. The rate constants for the four models have been determined and the correlation coefficients have been calculated in order to assess which model provides the best fit predicted data with experimental results. Seven statistical functions were used to estimate the error deviations between experimental and theoretically predicted kinetic adsorption values, including the average relative error deviation (ARED), Marquardt's percent standard error deviation (MPSED), the hybrid fractional error function (HYBRID), the sum of the squares of the errors (SSE) and three alternative statistical functions, including the Chi-square test, the F-test and Stu-dent's T-test. The results showed that, both Elovich equation and pseudo second-order equation provide the best fit to experimental data for different initial phosphate concentrations.

— Dans ce travail, nous avons étudié la contribution de matériaux utiles naturels : les déchets d... more — Dans ce travail, nous avons étudié la contribution de matériaux utiles naturels : les déchets de marbre de type THALA (Kasserine-Centre Ouest de la Tunisie) issus des rejets de marbrerie d'Utique-Bizerte et les sables de carrière de Bouarada (Séliana, Nord-Ouest de la Tunisie) à la rétention des phosphates des eaux grises issues des douches du foyer universitaire de l'ESIER Medjez El Bab. L'influence de certains paramètres, comme le débit d'alimentation des colonnes de filtration et les proportions des matériaux filtrants a été étudiée. Les principaux résultats ont montré que pour un débit d'alimentation de la colonne de 10 ml/mn, nous avons enregistré des rendements optimums de déphosphatation de 73,8% et de 99,8% respectivement pour des proportions de 100% de sable (S) et de 5% marbre beige ou gris (MB/MG)-95% sable (S) pour un temps de résidence de 150 mn dans les colonnes de filtration. Ce système de rétention des phosphates des eaux grises est l'une des solutions les plus simples et les plus judicieuses sur le plan écologique et économique.

In this paper, white limestone cement (WLC) was investigated to assess the possible use of this ... more In this paper, white limestone cement (WLC) was investigated to assess the possible use of this mineral material as an effective adsorbent for the removal of Zinc ions from an electroplating factory. The influence of various parameters such as contact time, pH solution, sorbent dose and agitation speed has been studied for the adsorption of Zn (II) onto white limestone cement (WLC) in batch mode. In order to investigate the mechanism of sorption suitable kinetic models have been used to test experimental data. The equilibrium Zn uptake (qe = 5.3 mg/g) onto WLC was reached for the initial Zinc concentration=38mg/L, pH=10.1, WLC material dosage= 7g/L and for 240 mn equilibrium contact time at 18°C±02. The results showed that, pseudo second-order and Elovich models, provides the best fit to experimental data predicting a chemisorption process. The removal of Zn (II) ions onto WLC material from electroplating effluent was also well describes by homogeneous diffusion and intra-particle diffusion models.

Water Science and Technology

Environmental science and pollution research international, Jan 26, 2016

Journal of Saudi Chemical Society, 2017

Youth and Water Security in Africa, 2022

Advances in environmental research

https://irjet.net/archives/V3/i3/IRJET-V3I3171.pdf

The present study examines the suitability assessment of an upflow-downflow siliceous sand/marble... more The present study examines the suitability assessment of an upflow-downflow siliceous sand/marble waste filtration system for treatment and reuse of grey water collected from bathrooms of the student residential complex at the Higher Institute of Engineering Medjez El Bab (Tunisia). Once the optimization of grey water pre-treatment system has been determined, the filtration system was operated at different hydraulic loading rate and media filter proportions in order to assess the suitability of treated grey water for irrigational purpose according to salinity hazard, sodium hazard , magnesium hazard, permeability index, water infiltration rate, and widely used graphical methods. Suitability of the treated grey water for industrial purpose was evaluated in terms of foaming, corrosion, and scaling. Under optimal operational conditions, results reveals that treated grey water samples with an upflow-downflow siliceous sand/marble waste filtration system may be considered as a good and an excellent water quality suitable for irrigation purpose. However, treated grey water was found not appropriate for industrial purpose due to high concentrations of calcium and sodium that can generate foaming and scaling harm to boilers. These results suggest that treated grey water with an upflow-downflow siliceous sand/marble waste filtration system would support production when used as irrigation water.

The removal of phosphates from aqueous solutions by adsorption onto date palm fibers (DPF) has be... more The removal of phosphates from aqueous solutions by adsorption onto date palm fibers (DPF) has been studied in batch mode. The aim of this study was to understand the mechanisms that govern phosphate sorption and find an appropriate model for the kinetics of removal. In order to investigate the mechanism of sorption and potential rate controlling steps, pseudo first-order, pseudo second-order, intra-particle diffusion and the Elovich equations have been used to test experimental data. Kinetic analysis of the four models has been carried out for initial phosphate concentration in the range of 30–110 mg/L. The rate constants for the four models have been determined and the correlation coefficients have been calculated in order to assess which model provides the best fit predicted data with experimental results. Seven statistical functions were used to estimate the error deviations between experimental and theoretically predicted kinetic adsorption values, including the average relative error deviation (ARED), Marquardt's percent standard error deviation (MPSED), the hybrid fractional error function (HYBRID), the sum of the squares of the errors (SSE) and three alternative statistical functions, including the Chi-square test, the F-test and Stu-dent's T-test. The results showed that, both Elovich equation and pseudo second-order equation provide the best fit to experimental data for different initial phosphate concentrations.