Abstract:In the present study, low-cost oil adsorptive materials based on chitosan (CS) and its functionalized derivatives (aminated chitosan (AmCS) and nonanyl chitosan schiffbase (NCS) were undertaken. The chemical structure of the CS sorbents, as well as its surface morphologies, was confirmed by Fourier infrared (FT-IR)spectroscopy and scanning electron microscope (SEM). Parameters affecting the sorption capacity such as reaction time, crude oil concentration, adsorbent dose, and temperatures were studied. Equilibr… Show more
“…Our results agreed with that reported by Omer et al for the uptake of oil spill by nonanyl chitosan-poly (butyl acrylate) grafted copolymer 25 . The same trend was also recorded for the removal of the crude oil spill by the chitosan and chitosan Schiff base derivatives 26 . Figure 3 Effect of various parameters on the uptake of crude oil onto Str and (Str-co-Benz) ( A ) adsorbent amount, ( B ) contact time, ( C ) initial oil concentration, and ( D ) agitation speed.…”
Section: Resultssupporting
confidence: 74%
“…Our results agreed with that reported by Omer et al for the uptake of oil spill by nonanyl chitosanpoly (butyl acrylate) grafted copolymer 25 . The same trend was also recorded for the removal of the crude oil spill by the chitosan and chitosan Schiff base derivatives 26 .…”
Section: Factors Influencing Oil Adsorption Performance Using Batch T...supporting
confidence: 74%
“…This outcome confirms the impact of external diffusion on the sorption kinetics of the oil adsorption process 36 . On the other hand, a higher agitation speed of more than 200 rpm results in a decrease in oil sorption capacity, which might be due to improving the oil–water emulsion process and reducing the attraction forces between the prepared adsorbent material and oil molecules, thereby promoting the oil desorption process 26 . This tendency for the oil desorption process could be attributed to the high rate of agitation that needed more energy input and resulted in a strong shear force that fractured the bonds between the oil molecules and the adsorbent material 37 .…”
Oil spills are a significant threat to the marine ecosystem that requires immediate removal from the oceanic environment. Many technologies have been employed to clean up oil spills. Of these, adsorption has scored a prominent success due to the high efficiency, economic viability, environmental friendship, and ease of application. The utilization of agricultural waste to produce biosorbents have been considered as an ecofriendly and efficient approach for removing oil. Thus, a new low-cost oil adsorbent was prepared via esterification of the wheat straw (Str) with a hydrophobic benzoyl group, the resulting copolymer (Str-co-Benz) was characterized by FTIR, TGA, DSC, and SEM and used at laboratory scale. The oil spill cleanup process was conducted using a crude oil-natural seawater system under different adsorption conditions such as oil concentration, adsorbent dose, agitation time and speed. Equilibrium studies were performed to determine the capacity of the prepared materials for crude oil adsorption. Langmuir and Freundlich adsorption models were used to describe the experimental isotherms. The reliability of the data was examined and evaluated via application of response surface methodology program. The results showed that oil adsorption followed a pseudo-second-order kinetic model and fitted well with Langmuir model with a maximum adsorption capacity of 10.989 and 12.786 g/g for Str and (Str-co-Benz), respectively. Overall, the modified wheat husk is an effective platform for removing oil from marine ecosystems due to low cost, biodegradability, simple synthesis and fast removal. Moreover, the resulted solid can be used as a fuel in some industrial processes such as steam boilers and brick production incinerators.
“…Our results agreed with that reported by Omer et al for the uptake of oil spill by nonanyl chitosan-poly (butyl acrylate) grafted copolymer 25 . The same trend was also recorded for the removal of the crude oil spill by the chitosan and chitosan Schiff base derivatives 26 . Figure 3 Effect of various parameters on the uptake of crude oil onto Str and (Str-co-Benz) ( A ) adsorbent amount, ( B ) contact time, ( C ) initial oil concentration, and ( D ) agitation speed.…”
Section: Resultssupporting
confidence: 74%
“…Our results agreed with that reported by Omer et al for the uptake of oil spill by nonanyl chitosanpoly (butyl acrylate) grafted copolymer 25 . The same trend was also recorded for the removal of the crude oil spill by the chitosan and chitosan Schiff base derivatives 26 .…”
Section: Factors Influencing Oil Adsorption Performance Using Batch T...supporting
confidence: 74%
“…This outcome confirms the impact of external diffusion on the sorption kinetics of the oil adsorption process 36 . On the other hand, a higher agitation speed of more than 200 rpm results in a decrease in oil sorption capacity, which might be due to improving the oil–water emulsion process and reducing the attraction forces between the prepared adsorbent material and oil molecules, thereby promoting the oil desorption process 26 . This tendency for the oil desorption process could be attributed to the high rate of agitation that needed more energy input and resulted in a strong shear force that fractured the bonds between the oil molecules and the adsorbent material 37 .…”
Oil spills are a significant threat to the marine ecosystem that requires immediate removal from the oceanic environment. Many technologies have been employed to clean up oil spills. Of these, adsorption has scored a prominent success due to the high efficiency, economic viability, environmental friendship, and ease of application. The utilization of agricultural waste to produce biosorbents have been considered as an ecofriendly and efficient approach for removing oil. Thus, a new low-cost oil adsorbent was prepared via esterification of the wheat straw (Str) with a hydrophobic benzoyl group, the resulting copolymer (Str-co-Benz) was characterized by FTIR, TGA, DSC, and SEM and used at laboratory scale. The oil spill cleanup process was conducted using a crude oil-natural seawater system under different adsorption conditions such as oil concentration, adsorbent dose, agitation time and speed. Equilibrium studies were performed to determine the capacity of the prepared materials for crude oil adsorption. Langmuir and Freundlich adsorption models were used to describe the experimental isotherms. The reliability of the data was examined and evaluated via application of response surface methodology program. The results showed that oil adsorption followed a pseudo-second-order kinetic model and fitted well with Langmuir model with a maximum adsorption capacity of 10.989 and 12.786 g/g for Str and (Str-co-Benz), respectively. Overall, the modified wheat husk is an effective platform for removing oil from marine ecosystems due to low cost, biodegradability, simple synthesis and fast removal. Moreover, the resulted solid can be used as a fuel in some industrial processes such as steam boilers and brick production incinerators.
“…We used pseudo-first-order, pseudo-second-order, Elovich, and intraparticle-diffusion models: , lnfalse(qe−qtfalse)=ln0.25emqe−k1ttqt=1k2qe2+tqeqt=βlnfalse(αβfalse)+βlntqt=Kpt0.5+C…”
Addressing industrial wastewater treatment challenges and removing hazardous organic pollutants, such as carcinogenic methyl orange (MO) and azo dyes, is a pressing concern. This study explores the use of the Zea mays envelope, an agricultural waste product, to produce Z. mays activated carbon (ZMAC) through the chemical activation of maize envelopes with phosphoric acid. Various analytical techniques, including FTIR, XRD, TGA, DSC, and SEM, characterize ZMAC. Results show that ZMAC exhibits an impressive monolayer adsorption capacity of 66.2 mg/g for MO. The Langmuir isotherm model fits the experimental data well, indicating monolayer coverage of the MO on the ZMAC surface. The pH-sensitive adsorption process demonstrates an optimal removal efficiency at pH 4. ZMAC follows the pseudo-second-order kinetic model, and diffusion rate constant analysis identifies three consecutive stages in the adsorption process. Moreover, the uptake of MO ions by ZMAC is identified as an exothermic and spontaneous process. Reusability tests demonstrate efficient regeneration of ZMAC up to five times with 1 mL of 2 M HNO 3 in each cycle, without sorbent mass loss. Thermodynamic analysis shows an increase in the uptake capacity from 66.2 to 73.2 mg/g with temperature elevation. This study offers practical solutions for industrial wastewater treatment challenges, providing an environmentally sustainable and effective approach to mitigate the risks associated with hazardous organic pollutants.
“…[11][12][13] Recent publications of chitosan and derivatives have been classified into their various applications in food, pharmaceutical, biotechnology, medical, textile, paper, agriculture, and environmental applications. [14,15] Chitosan film, when prepared from chitosan solution in acetic acid, possesses some unpleasant properties, such as its remaining acid content and poor mechanical properties. A new chitosan aqueous dispersion was developed as a film-forming material with a lower acid content and improved mechanical properties.…”
In this study, chitosan was modified with cellulose and gelatin for the removal of Cu2+, Fe2+, and Pb2+ from oily wastewater. Chitosan was characterized using Fourier‐transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and X‐ray diffraction (XRD). Carbon (77.54%), hydrogen (10.30%), oxygen (8.89%), nitrogen (2.74%), and sulphur (0.53%) were found in the organic constitution of the oil utilized, according to elemental analysis. Despite the presence of other metal ions in the used oil and effluent, this study focused solely on Cu2+, Fe2+, and Pb2+. Studies on the removal of Cu2+, Fe2+, and Pb2+ from oily wastewater were conducted, and multiple effect factors such as temperature and pH, time and pH, solvent and pH, temperature and time, temperature and solvent, and time and solvent were evaluated. An adsorption study was performed to remove the heavy metals. The results revealed that the highest percentage removal of Cu2+ was 96.62 (pH = 7.52 and conductivity = −12 mV), of Fe2+ was 97.95 (pH = 6.30 and conductivity = +68 mV), and of Pb2+ was 98.86 (pH = 10.58 and conductivity = −170 mV). To analyze the impacts of experimental factors, experiments were developed using central composite design (CCD) based on response surface methodology (RSM).
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