Using treated wastewater for irrigation is a good solution for conserving water, but it is also i... more Using treated wastewater for irrigation is a good solution for conserving water, but it is also in part responsible for groundwater and water surface pollution by heavy metals, especially copper and cadmium. The soil can be a barrier to retaining these pollutants and protecting the water resource. This study presents an assessment of the adsorption of copper and cadmium by two agricultural soils from Tunisia and Romania to evaluate the risk of water pollution. At first, the two soils were characterized with a scanning electron microscope and different physico-chemical analyses. Before adsorption, the elemental analysis performed with an SEM showed a very low amount of cadmium and copper in both soils (0.01%). The Tunisian soil was considered clayey soil, and the Romanian soil was sandy clayey soil. All experimental kinetics and isotherms were well correlated (R2 > 0.9) with the pseudo-first-order kinetic model and the modified and extended Redlich–Peterson binary adsorption model...
International Journal of Environmental Science and Technology, 2020
This work aims to valorize the solid waste resulting from the extraction of essential oils from t... more This work aims to valorize the solid waste resulting from the extraction of essential oils from three species of Dittrichia plants (viscosa, graveolens and crithmoides). The study includes the characterization of these biomaterials and their use in the elimination of the cadmium ion. For each species, taken in the raw state and then in the exhausted state after hydrodistillation, the studies were conducted on the leaves and flowers on the one hand and on the whole aerial part on the other. The results of the surface characterization (scanning electron microscopy, Fourier transform infrared spectroscopy, point of zero charge and Boehm titration) showed that these residual solids had a low surface area, but revealed the existence of basic and acidic functions ranging from 0.16 to 0.42 meq.g−1 and from 0.65 to 1.90 meq.g−1, respectively. Adsorption experiments showed that solid adsorption capacities ranged from 10.61 to 16.92 mg.g−1 for the raw materials and from 4.72 to 13.16 mg.g−1 for the exhausted materials. Sips three-parameter equation was successfully used to model all adsorption isotherms. The retention of cadmium increased from 4.73 to 16.92 mg.g−1 when varying the acid content from 0.65 to 1.90 meq.g−1. The amount of retained cadmium increased significantly by increasing the pH from 2 to 8 and the temperature from 20 to 60 °C. This work clearly shows the relationship between the surface function content and the retention capacity of cadmium ions by biomaterials.
Water science and technology : a journal of the International Association on Water Pollution Research, 2016
Extracted cellulose from Posidonia oceanica was used as an adsorbent for removal of a cationic (B... more Extracted cellulose from Posidonia oceanica was used as an adsorbent for removal of a cationic (Basic blue 9, BB) and anionic textile dye (Acid blue 25, AB) from aqueous solution in single dye system. Characterization of the extracted cellulose and extracted cellulose-dye systems were performed using several techniques such as Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, zeta potential and Boehm acid-base titration method. Adsorption tests showed that the extracted cellulose presented higher adsorption of BB than AB in single dye system, revealing that electrostatic interactions are responsible, in the first instance, for the dye-adsorbent interaction. In single dye systems, the extracted cellulose presented the maximum adsorption capacities of BB and AB at 0.955 mmol.g(-1) and 0.370 mmol.g(-1), respectively. Adsorption experiments of AB dye on extracted cellulose saturated by BB dye exhibited the release of the latter dye from the sorbent which lead to...
Extracted cellulose from Posidonia oceanica was used as an adsorbent for removal of a cationic (B... more Extracted cellulose from Posidonia oceanica was used as an adsorbent for removal of a cationic (Basic blue 9, BB) and anionic textile dye (Acid blue 25, AB) from aqueous solution in single dye system. Characterization of the extracted cellulose and extracted cellulose-dye systems were performed using several techniques such as Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), zeta potential and Boehm acid– base titration method. Adsorption tests showed that the extracted cellulose presented higher adsorption of BB than AB in single dye system, revealing that electrostatic interactions are responsible, in the first instance, for the dye– adsorbent interaction. In single dye systems, the extracted cellulose presented the maximum adsorption capacities of BB and AB at 0.955 and 0.370 mmol.g-1, respectively. Adsorption experiments of AB dye on extracted cellulose saturated by BB dye exhibited the release of the latter dye from the sorbent which lead ...
The release of aqueous residues generated by the extraction process of essential oils presents a ... more The release of aqueous residues generated by the extraction process of essential oils presents a real risk of environmental pollution. This work aims to reduce this risk and produce value-added materials. The aqueous residue of Dittrichia graveolens (D. graveolens) hydrodistillation has been reused in two valorization ways: 1/in the ecological dyeing. 2/in biological field. First, a phytochemical study of the aqueous residue was carried out by determining the content of polyphenols (237 mg EqAG g−1) and flavonoids (91 mg EqC g−1). Second, HPLC analysis allowed the identification and evaluation of catechin (5.92 mg g−1 of extract) and quercetin (4 mg g−1 of extract) as two of the coloring molecules present in this aqueous residue. Third, the eco-dyeing process with the aqueous residue was performed on the polyamide fabric, the process was optimized by the surface response methodology using Minitab software. Thus, the optimum dyeing conditions were evaluated at pH, temperature and dur...
Recent Advances in Environmental Science from the Euro-Mediterranean and Surrounding Regions
The use of treated wastewater for agricultural soils irrigation is an alternative to the water sh... more The use of treated wastewater for agricultural soils irrigation is an alternative to the water shortage affecting Tunisia.
Posidonia oceanica, an endemic marine magnoliophyta found in the Mediterranean Sea, is used as a ... more Posidonia oceanica, an endemic marine magnoliophyta found in the Mediterranean Sea, is used as a biosorbent for dye wastewater treatment. The ability of P. oceanica to remove the dye C.I. Acid Yellow 59 from an aqueous solution was compared to that of two commercial activated carbon forms: powdered (PAC) and granular (GAC) activated carbon. The effect of initial pH, mass
Dans le cadre d'un contrat europeen sur la modelisation du transport des polluants a travers ... more Dans le cadre d'un contrat europeen sur la modelisation du transport des polluants a travers des sols contamines, des experiences en colonne de laboratoire ont ete realisees afin de determiner les proprietes de retention de deux hydrocarbures polyaromatiques (naphtalene et phenanthrene) a travers des sables de contenu en matiere organique variable en nature et en quantite. Il a ainsi ete confirme que la matiere organique jouait un role preponderant dans le processus de retention. Il a ete montre que le polluant le plus hydrophobe (phenanthrene) s'adsorbait egalement sur la partie minerale des sables meme si cette interaction lineaire, est de faible intensite comparee a celle obtenue sur les sables organiques. Le naphtalene nous a permis de montrer que le type et l'intensite de la retention d'un polluant hydrophobe dependaient de la nature de la matiere organique. L’etude menee jusqu'au voisinage de la solubilite a mis en evidence d'importants effets non-linea...
Using treated wastewater for irrigation is a good solution for conserving water, but it is also i... more Using treated wastewater for irrigation is a good solution for conserving water, but it is also in part responsible for groundwater and water surface pollution by heavy metals, especially copper and cadmium. The soil can be a barrier to retaining these pollutants and protecting the water resource. This study presents an assessment of the adsorption of copper and cadmium by two agricultural soils from Tunisia and Romania to evaluate the risk of water pollution. At first, the two soils were characterized with a scanning electron microscope and different physico-chemical analyses. Before adsorption, the elemental analysis performed with an SEM showed a very low amount of cadmium and copper in both soils (0.01%). The Tunisian soil was considered clayey soil, and the Romanian soil was sandy clayey soil. All experimental kinetics and isotherms were well correlated (R2 > 0.9) with the pseudo-first-order kinetic model and the modified and extended Redlich–Peterson binary adsorption model...
International Journal of Environmental Science and Technology, 2020
This work aims to valorize the solid waste resulting from the extraction of essential oils from t... more This work aims to valorize the solid waste resulting from the extraction of essential oils from three species of Dittrichia plants (viscosa, graveolens and crithmoides). The study includes the characterization of these biomaterials and their use in the elimination of the cadmium ion. For each species, taken in the raw state and then in the exhausted state after hydrodistillation, the studies were conducted on the leaves and flowers on the one hand and on the whole aerial part on the other. The results of the surface characterization (scanning electron microscopy, Fourier transform infrared spectroscopy, point of zero charge and Boehm titration) showed that these residual solids had a low surface area, but revealed the existence of basic and acidic functions ranging from 0.16 to 0.42 meq.g−1 and from 0.65 to 1.90 meq.g−1, respectively. Adsorption experiments showed that solid adsorption capacities ranged from 10.61 to 16.92 mg.g−1 for the raw materials and from 4.72 to 13.16 mg.g−1 for the exhausted materials. Sips three-parameter equation was successfully used to model all adsorption isotherms. The retention of cadmium increased from 4.73 to 16.92 mg.g−1 when varying the acid content from 0.65 to 1.90 meq.g−1. The amount of retained cadmium increased significantly by increasing the pH from 2 to 8 and the temperature from 20 to 60 °C. This work clearly shows the relationship between the surface function content and the retention capacity of cadmium ions by biomaterials.
Water science and technology : a journal of the International Association on Water Pollution Research, 2016
Extracted cellulose from Posidonia oceanica was used as an adsorbent for removal of a cationic (B... more Extracted cellulose from Posidonia oceanica was used as an adsorbent for removal of a cationic (Basic blue 9, BB) and anionic textile dye (Acid blue 25, AB) from aqueous solution in single dye system. Characterization of the extracted cellulose and extracted cellulose-dye systems were performed using several techniques such as Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, zeta potential and Boehm acid-base titration method. Adsorption tests showed that the extracted cellulose presented higher adsorption of BB than AB in single dye system, revealing that electrostatic interactions are responsible, in the first instance, for the dye-adsorbent interaction. In single dye systems, the extracted cellulose presented the maximum adsorption capacities of BB and AB at 0.955 mmol.g(-1) and 0.370 mmol.g(-1), respectively. Adsorption experiments of AB dye on extracted cellulose saturated by BB dye exhibited the release of the latter dye from the sorbent which lead to...
Extracted cellulose from Posidonia oceanica was used as an adsorbent for removal of a cationic (B... more Extracted cellulose from Posidonia oceanica was used as an adsorbent for removal of a cationic (Basic blue 9, BB) and anionic textile dye (Acid blue 25, AB) from aqueous solution in single dye system. Characterization of the extracted cellulose and extracted cellulose-dye systems were performed using several techniques such as Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), zeta potential and Boehm acid– base titration method. Adsorption tests showed that the extracted cellulose presented higher adsorption of BB than AB in single dye system, revealing that electrostatic interactions are responsible, in the first instance, for the dye– adsorbent interaction. In single dye systems, the extracted cellulose presented the maximum adsorption capacities of BB and AB at 0.955 and 0.370 mmol.g-1, respectively. Adsorption experiments of AB dye on extracted cellulose saturated by BB dye exhibited the release of the latter dye from the sorbent which lead ...
The release of aqueous residues generated by the extraction process of essential oils presents a ... more The release of aqueous residues generated by the extraction process of essential oils presents a real risk of environmental pollution. This work aims to reduce this risk and produce value-added materials. The aqueous residue of Dittrichia graveolens (D. graveolens) hydrodistillation has been reused in two valorization ways: 1/in the ecological dyeing. 2/in biological field. First, a phytochemical study of the aqueous residue was carried out by determining the content of polyphenols (237 mg EqAG g−1) and flavonoids (91 mg EqC g−1). Second, HPLC analysis allowed the identification and evaluation of catechin (5.92 mg g−1 of extract) and quercetin (4 mg g−1 of extract) as two of the coloring molecules present in this aqueous residue. Third, the eco-dyeing process with the aqueous residue was performed on the polyamide fabric, the process was optimized by the surface response methodology using Minitab software. Thus, the optimum dyeing conditions were evaluated at pH, temperature and dur...
Recent Advances in Environmental Science from the Euro-Mediterranean and Surrounding Regions
The use of treated wastewater for agricultural soils irrigation is an alternative to the water sh... more The use of treated wastewater for agricultural soils irrigation is an alternative to the water shortage affecting Tunisia.
Posidonia oceanica, an endemic marine magnoliophyta found in the Mediterranean Sea, is used as a ... more Posidonia oceanica, an endemic marine magnoliophyta found in the Mediterranean Sea, is used as a biosorbent for dye wastewater treatment. The ability of P. oceanica to remove the dye C.I. Acid Yellow 59 from an aqueous solution was compared to that of two commercial activated carbon forms: powdered (PAC) and granular (GAC) activated carbon. The effect of initial pH, mass
Dans le cadre d'un contrat europeen sur la modelisation du transport des polluants a travers ... more Dans le cadre d'un contrat europeen sur la modelisation du transport des polluants a travers des sols contamines, des experiences en colonne de laboratoire ont ete realisees afin de determiner les proprietes de retention de deux hydrocarbures polyaromatiques (naphtalene et phenanthrene) a travers des sables de contenu en matiere organique variable en nature et en quantite. Il a ainsi ete confirme que la matiere organique jouait un role preponderant dans le processus de retention. Il a ete montre que le polluant le plus hydrophobe (phenanthrene) s'adsorbait egalement sur la partie minerale des sables meme si cette interaction lineaire, est de faible intensite comparee a celle obtenue sur les sables organiques. Le naphtalene nous a permis de montrer que le type et l'intensite de la retention d'un polluant hydrophobe dependaient de la nature de la matiere organique. L’etude menee jusqu'au voisinage de la solubilite a mis en evidence d'importants effets non-linea...
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