Kinetic and thermodynamic study of cobalt adsorption by spent coffee

Imessaoudene, Djillali; Hanini, Salah; Bouzidi, Abdelkader; Ararem, Abderrahmane

doi:10.1080/19443994.2015.1041049

Cited by 19 publications

(11 citation statements)

References 26 publications

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“…Typical moieties present in the SCG were also identified, e.g., the aliphatic C-H stretching vibration that was observed at 2927 cm −1 and 2855 cm −1 , the C-C stretching vibration in alkyne that was detected at 2164 cm −1 and 2168 cm −1 , the carboxyl C=O and the aromatic C=C stretching vibrations in the range of 1500–1700 cm −1 , the N–H or the –OH stretching vibrations observed at 1365 cm −1 and 1384 cm −1 for the SCBC and the TiO 2 @SCBC, respectively. The peak at 1063 cm −1 is associated with the C–OH vibration [ 41 , 42 , 43 ]. The same peak appears in the spectrum of the TiO 2 @SCBC but with a red shift to 1039 cm −1 .…”

Section: Resultsmentioning

confidence: 99%

Biochar of Spent Coffee Grounds as Per Se and Impregnated with TiO2: Promising Waste-Derived Adsorbents for Balofloxacin

2021

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Biochars (BC) of spent coffee grounds, both pristine (SCBC) and impregnated with titanium oxide (TiO2@SCBC) were exploited as environmentally friendly and economical sorbents for the fluroquinolone antibiotic balofloxacin (BALX). Surface morphology, functional moieties, and thermal stabilities of both adsorbents were scrutinized using SEM, EDS, TEM, BET, FTIR, Raman, and TG/dT analyses. BET analysis indicated that the impregnation with TiO2 has increased the surface area (50.54 m2/g) and decreased the pore size and volume. Batch adsorption experiments were completed in lights of the experimental set-up of Plackett–Burman design (PBD). Two responses were maximized; the % removal (%R) and the adsorption capacity (qe, mg/g) as a function of four variables: pH, adsorbent dosage (AD), BALX concentration ([BALX]), and contact time (CT). %R of 68.34% and 91.78% were accomplished using the pristine and TiO2@SCBC, respectively. Equilibrium isotherms indicated that Freundlich model was of a perfect fit for adsorption of BALX onto both adsorbents. Maximum adsorption capacity (qmax) of 142.55 mg/g for SCBC and 196.73 mg/g for the TiO2@SCBC. Kinetics of the adsorption process were best demonstrated using the pseudo-second order (PSO) model. The adsorption-desorption studies showed that both adsorbents could be restored with the adsorption efficiency being conserved up to 66.32% after the fifth cycles.

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Section: Resultsmentioning

confidence: 99%

Biochar of Spent Coffee Grounds as Per Se and Impregnated with TiO2: Promising Waste-Derived Adsorbents for Balofloxacin

2021

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“…There are several techniques to remove the cobalt ions from wastewater [6] including adsorption [7][8][9], solvent extraction [10,11], liquid membranes (i.e., SLM) [12] and polymer inclusion membranes (PIMs) [6]. PIMs as a simple technique for preparation [13,14], possess high stability, selectivity and efficiency, as well as they can be easily designed based on the nature of heavy metals [15].…”

Section: Polymer Inclusion Membranementioning

confidence: 99%

Statistical analysis and optimal design of polymer inclusion membrane for water treatment by Co(II) removal

Shirzad¹,

Karimi²

2020

DWT

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Recently, there is a huge volume of polluted wastewater released from the industries, which adversely affects the environment and human health. As a result, finding a simple, inexpensive, and efficient strategy for water purification is one of the major concerns of researchers. In this study, based on the scope of heavy metals removal from the polluted water, the polymer inclusion membrane has been employed for Co(II) removal. In this way, the main separation parameters in the membrane structure and aqueous phases including carrier percentage, percentage of plasticizer, pH of source phase, and receiving phase acid concentration have been considered at the room temperature and atmospheric pressure, simultaneously, by applying the response surface methodology. The range of considered parameters varied between 5 and 35%wt (total weight of the reference membrane), 40-70%wt (total weight of the reference membrane), 2.5-6.5, and 0.5-2.5 mol L -1 for the carrier percentage, percentage of plasticizer, pH of the source phase, and receiving phase acid concentration, respectively. The statistical analysis of experimental tests showed an admissible agreement between these values and model outputs by developing acceptable results for Adj-R 2 (0.9978) and p-value (p < 0.0001). Also, the ion removal has been optimized by maximizing the removal factor at a constant time of 24 h (%RF max = 73.25%) to achieve the optimum quantities of considered parameters. A test in the optimal operational conditions with the removal factor of 73.99% verified the reliability and accuracy of the proposed model. Finally, the interaction coefficients between the considered variables are completely analyzed to have a better grasp about the polymer inclusion membranes.

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“…Later, distinct particle sizes (0.3-0.5, 0.5-0.8, 0.8-1.4, 1.4-2.0, and 0.3-0.8 mm) were utilized, while maintaining C ini at 100 mg L −1 and the pH at 7.0. Finally, different initial values of C ini (10,20,40,60,80,100,200, and 300 mg L −1 ) were used, while maintaining the pH at 7.0 and the particle size at 0.3-0.8 mm.…”

Section: The Influence Of Different Physicochemical Parameters On Thementioning

confidence: 99%

“…In 125 mL flasks were poured 30 mL of solutions of Co 2+ at distinct concentrations (20,40,60,80,100,200, and 300 mg L −1 ), adjusting the pH to 7.0. Then 0.03 g of PLEM (particle size = 0.3-0.8 mm) was placed in each flask to ensure a concentration of 1 g L −1 of PLEM.…”

Section: Biosorption Isotherm Studies At Different Temperaturesmentioning

confidence: 99%

Biosorption of Co2+ Ions from Aqueous Solution by K2HPO4-Pretreated Duckweed Lemna gibba

2020

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The wastewater of the many industries that use divalent cobalt (Co2+)-containing compounds has elevated levels of this metal. Thus, novel technology is needed to efficiently remove Co2+ ions from aqueous solutions. Biosorption is a low-cost technique capable of removing heavy metals from contaminated water. This study aims to evaluate the performance of KH2PO4-pretreated Lemna gibba (PLEM) as a biosorbent of Co2+ in aqueous solutions tested under different conditions of pH, particle size, and initial Co2+ concentration. Kinetic, equilibrium, and thermodynamic studies were conducted. The capacity of biosorption increased with a greater initial Co2+ concentration and was optimal at pH 7.0 and with small-sized biosorbent particles (0.3–0.8 mm). The pseudo-second-order sorption model best describes the experimental data on Co2+ biosorption kinetics. The Sips and Redlich-Peterson isotherm models best predict the biosorption capacity at equilibrium. According to the thermodynamic study, biosorption of Co2+ was endothermic and spontaneous. The effect of pH on the biosorption/desorption of Co2+ suggests that electrostatic attraction is the main biosorption mechanism. SEM-EDX verified the presence of Co2+ on the surface of the pretreated-saturated biosorbent and the absence of the metal after desorption.

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Kinetic and thermodynamic study of cobalt adsorption by spent coffee

Cited by 19 publications

References 26 publications

Biochar of Spent Coffee Grounds as Per Se and Impregnated with TiO2: Promising Waste-Derived Adsorbents for Balofloxacin

Biochar of Spent Coffee Grounds as Per Se and Impregnated with TiO2: Promising Waste-Derived Adsorbents for Balofloxacin

Statistical analysis and optimal design of polymer inclusion membrane for water treatment by Co(II) removal

Biosorption of Co2+ Ions from Aqueous Solution by K2HPO4-Pretreated Duckweed Lemna gibba

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