International Journal of Environmental Analytical Chemistry, 2021
The environmental pollution caused by organic molecules as Tetracyclines and Oxytetracyclines pre... more The environmental pollution caused by organic molecules as Tetracyclines and Oxytetracyclines presents a foremost concern, as high levels of these antibiotics when released into the ecosystem are a...
intensive use of pesticides in modern agriculture has led to serious problems in the quality of s... more intensive use of pesticides in modern agriculture has led to serious problems in the quality of superficial or underground water, which led to the development of diseases and destruction of fauna and flora. Water pollution by these pesticides is a reality more and more present in Morocco that requires control and elimination of these compounds in the aqueous medium. Therefore, it is important to take interest in their ability to be degraded and the degradation pathway. Pesticides are only partially degraded in the field and transformation products are formed which can also be found in groundwater or rivers. The downside of partial degradation is that transformation products are often more mobile than their parent compound, can be more persistent and even more toxic; inducing the increase of total contamination. In this study, we focused on fenamiphos as pesticide. This product belongs to the chemical family of organophosphates and it is widely used as an insecticide and nematicide o...
Leachate generated by urban waste is one of the significant constraints of landfill management. B... more Leachate generated by urban waste is one of the significant constraints of landfill management. Because of their pollutant load, it poses a threat to the environment and human health. It is, therefore, imperative to contribute to its elimination. This work consists in proposing a reliable and feasible solution based on an integrated research and development approach that respects the concept of 3R (reduction, recycling and reuse). The solution is to use leachate instead of water in the composting process of the organic fraction of household waste. A platform was built on the site of the Mohammedia landfill, located near the city of Rabat, the Moroccan capital, to conduct an experimental study on 30 tons of household and similar waste (HAW). The sorting operation allowed to separate the fermentable fraction of 58.26%. Leachate stored on-site was used for composting. The results found that the composting process caused the consumption of about 8.1 m3 of leachate and the production of ...
Synthetic dyes are added to food and drinks to restore original appearance when color is affected... more Synthetic dyes are added to food and drinks to restore original appearance when color is affected by their processing, storage, packaging and distribution. Furthermore colors are used to make food more visually attractive to Consumers. (Bonan and al, 2013) The determination of food dyes byHhigh Performance Liquid Chromatography UV detector diode array (HPLC -DAD ) allows the simultaneous determination in a single pass , identification and quantification of eleven synthetic food colors authorized by Moroccan and international regulation (EU Directive 1994/36/CE )( Figure 1). The analytical protocol includes a easy preprocessing procedure for the extraction of colors in foods . It offer an excellent combination of sensitivity and selectivity , simplicity and analysis time equal to 45 min , with relatively short quantification limits respectively ( 0.03 ppm and 0.09 ppm ) obtained by Canadian validation method (CENTRE D‟EXPERTISE EN ANALYSE ENVIRONNEMENTALE DU QUÉBEC, 2009). Compared t...
The 3-amino 1, 2,4-triazol, refereed as (ATA), was tested as inhibitor for differentmaterials (co... more The 3-amino 1, 2,4-triazol, refereed as (ATA), was tested as inhibitor for differentmaterials (copper, iron and bronze) corrosion in urban-marine solutions by electrochemical polarization methods and weight loss measurement. Results obtained in this study reveal thatATAis a good inhibitor and the potentiodynamic polarization studies clearly show thatATAis a mixedtype inhibitor for bronze, cathodic inhibitor for iron and anodic inhibitor for copper. The inhibition efficiency of ATA increases with the increase of inhibitor concentration and reaches an optimumvalue (up to 90%) at 10-2Min urban-marine solution for the different substrates. The SEM-EDS analysis of the protective layer of ATA after corrosion experiments shows that the inhibitor preventsmetal corrosion by the formation of a protective layer and the adsorption of the inhibitor on the surface.
Iron hydroxide (III) synthesized and applied to remove the As (III) and As (V). The optimum pH on... more Iron hydroxide (III) synthesized and applied to remove the As (III) and As (V). The optimum pH on the adsorption is between pH 4 and pH 9. Experiments were performed to study the effect of pH and the contact time (T) on the Co precipitation-sorption of Arsenic (III) and Iron (III) Hydroxides. Several co-precipitation experiments are performed with 120 mg of iron (III), from solutions having a pH ranging from about 4.7 and 9, at time 240 min. In this study, the adsorption of the arsenic (III) on the surface of iron hydroxide (III) is examined by adopting surface complexation model, This model successfully used to describe the adsorption of iron on the metal oxides suppose that this phenomenon occurs through an inner-sphere legend exchange mechanisms with surface functional group (≡ FeOH). The results of the study show that the co-precipitation of arsenic (III) with Fe (OH)3 was more dependent on the concentration of iron and H + ions. Complexation in a monodentate area was more impor...
International Journal of Environmental Analytical Chemistry, 2021
The environmental pollution caused by organic molecules as Tetracyclines and Oxytetracyclines pre... more The environmental pollution caused by organic molecules as Tetracyclines and Oxytetracyclines presents a foremost concern, as high levels of these antibiotics when released into the ecosystem are a...
International Journal of Environmental Analytical Chemistry, 2021
The environmental pollution caused by organic molecules as Tetracyclines and Oxytetracyclines pre... more The environmental pollution caused by organic molecules as Tetracyclines and Oxytetracyclines presents a foremost concern, as high levels of these antibiotics when released into the ecosystem are a...
intensive use of pesticides in modern agriculture has led to serious problems in the quality of s... more intensive use of pesticides in modern agriculture has led to serious problems in the quality of superficial or underground water, which led to the development of diseases and destruction of fauna and flora. Water pollution by these pesticides is a reality more and more present in Morocco that requires control and elimination of these compounds in the aqueous medium. Therefore, it is important to take interest in their ability to be degraded and the degradation pathway. Pesticides are only partially degraded in the field and transformation products are formed which can also be found in groundwater or rivers. The downside of partial degradation is that transformation products are often more mobile than their parent compound, can be more persistent and even more toxic; inducing the increase of total contamination. In this study, we focused on fenamiphos as pesticide. This product belongs to the chemical family of organophosphates and it is widely used as an insecticide and nematicide o...
Leachate generated by urban waste is one of the significant constraints of landfill management. B... more Leachate generated by urban waste is one of the significant constraints of landfill management. Because of their pollutant load, it poses a threat to the environment and human health. It is, therefore, imperative to contribute to its elimination. This work consists in proposing a reliable and feasible solution based on an integrated research and development approach that respects the concept of 3R (reduction, recycling and reuse). The solution is to use leachate instead of water in the composting process of the organic fraction of household waste. A platform was built on the site of the Mohammedia landfill, located near the city of Rabat, the Moroccan capital, to conduct an experimental study on 30 tons of household and similar waste (HAW). The sorting operation allowed to separate the fermentable fraction of 58.26%. Leachate stored on-site was used for composting. The results found that the composting process caused the consumption of about 8.1 m3 of leachate and the production of ...
Synthetic dyes are added to food and drinks to restore original appearance when color is affected... more Synthetic dyes are added to food and drinks to restore original appearance when color is affected by their processing, storage, packaging and distribution. Furthermore colors are used to make food more visually attractive to Consumers. (Bonan and al, 2013) The determination of food dyes byHhigh Performance Liquid Chromatography UV detector diode array (HPLC -DAD ) allows the simultaneous determination in a single pass , identification and quantification of eleven synthetic food colors authorized by Moroccan and international regulation (EU Directive 1994/36/CE )( Figure 1). The analytical protocol includes a easy preprocessing procedure for the extraction of colors in foods . It offer an excellent combination of sensitivity and selectivity , simplicity and analysis time equal to 45 min , with relatively short quantification limits respectively ( 0.03 ppm and 0.09 ppm ) obtained by Canadian validation method (CENTRE D‟EXPERTISE EN ANALYSE ENVIRONNEMENTALE DU QUÉBEC, 2009). Compared t...
The 3-amino 1, 2,4-triazol, refereed as (ATA), was tested as inhibitor for differentmaterials (co... more The 3-amino 1, 2,4-triazol, refereed as (ATA), was tested as inhibitor for differentmaterials (copper, iron and bronze) corrosion in urban-marine solutions by electrochemical polarization methods and weight loss measurement. Results obtained in this study reveal thatATAis a good inhibitor and the potentiodynamic polarization studies clearly show thatATAis a mixedtype inhibitor for bronze, cathodic inhibitor for iron and anodic inhibitor for copper. The inhibition efficiency of ATA increases with the increase of inhibitor concentration and reaches an optimumvalue (up to 90%) at 10-2Min urban-marine solution for the different substrates. The SEM-EDS analysis of the protective layer of ATA after corrosion experiments shows that the inhibitor preventsmetal corrosion by the formation of a protective layer and the adsorption of the inhibitor on the surface.
Iron hydroxide (III) synthesized and applied to remove the As (III) and As (V). The optimum pH on... more Iron hydroxide (III) synthesized and applied to remove the As (III) and As (V). The optimum pH on the adsorption is between pH 4 and pH 9. Experiments were performed to study the effect of pH and the contact time (T) on the Co precipitation-sorption of Arsenic (III) and Iron (III) Hydroxides. Several co-precipitation experiments are performed with 120 mg of iron (III), from solutions having a pH ranging from about 4.7 and 9, at time 240 min. In this study, the adsorption of the arsenic (III) on the surface of iron hydroxide (III) is examined by adopting surface complexation model, This model successfully used to describe the adsorption of iron on the metal oxides suppose that this phenomenon occurs through an inner-sphere legend exchange mechanisms with surface functional group (≡ FeOH). The results of the study show that the co-precipitation of arsenic (III) with Fe (OH)3 was more dependent on the concentration of iron and H + ions. Complexation in a monodentate area was more impor...
International Journal of Environmental Analytical Chemistry, 2021
The environmental pollution caused by organic molecules as Tetracyclines and Oxytetracyclines pre... more The environmental pollution caused by organic molecules as Tetracyclines and Oxytetracyclines presents a foremost concern, as high levels of these antibiotics when released into the ecosystem are a...
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