Adsorption of Pb(II) from aqueous solutions using activated carbon developed from Apricot stone

Mouni, Lotfi; Merabet, Djoudi; Bouzaza, Abdelkrim; Belkhiri, Lazhar

doi:10.1016/j.desal.2011.03.038

Cited by 182 publications

(67 citation statements)

References 24 publications

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“…It is due to the high number of unsaturated biosorption sites during the biosorption process [46]. Similar results were previously reported by some researchers [45,47].…”

Section: Effect Of Biosorbent Dosesupporting

confidence: 80%

Biosorption of cationic dye from aqueous solutions onto lignocellulosic biomass (Luffa cylindrica): characterization, equilibrium, kinetic and thermodynamic studies

et al. 2016

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In the present study, biomass fiber (Luffa cylindrica) has been successfully used as biosorbent for the removal of a cationic dye namely, methylene blue, from aqueous solution using a batch process. The characterization of the biosorbent was carried out by the infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The chemical composition has been established by the energy dispersive X-Ray spectroscopy (EDS). The effects of various parameters such as the contact time (0-160 min), solution pH (2-10), biosorbent dose (0.5-8 g L -1 ), particle size, initial MB concentration (20-300 mg L -1 ) and temperature (20-60°C) were optimized. The biosorption isotherms were investigated by the Langmuir, Freundlich, Dubinin-Radushkevich and Tempkin models. The data were well fitted with the Langmuir model, with a maximum biosorption capacity of 49.46 mg g -1 at 20°C. The kinetics data were analyzed by the pseudo-first-order and pseudo-second-order models. The mass transfer model in terms of interlayer diffusion was applied to examine the mechanisms of the rate-controlling step (R 2 = 0.9992-0.9999). The thermodynamic parameters: free energy (DG°= -5.428 to -3.364 kJ mol -1 ), enthalpy (DH°= -20.547 kJ mol -1 ) and entropy (DS°= -0.052 kJ mol -1 K -1 ) were determined over the temperatures range (20-60°C). The results indicate that Luffa cylindrica could be an interesting biomass of alternative material with respect to more costly adsorbents used nowadays for dye removal.

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“…It is due to the high number of unsaturated biosorption sites during the biosorption process [46]. Similar results were previously reported by some researchers [45,47].…”

Section: Effect Of Biosorbent Dosesupporting

confidence: 80%

Biosorption of cationic dye from aqueous solutions onto lignocellulosic biomass (Luffa cylindrica): characterization, equilibrium, kinetic and thermodynamic studies

et al. 2016

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“…Due to the hydrophobic interaction between activated carbon and modifier [26], activated carbon has a strong ability to fix PDDDAB and DTAB. Studies have shown that anion exchange and electrostatic adsorption are the main adsorption mechanisms for cationic surfactant-modified activated carbon [27]. The reaction can be described by the following reaction equation: when the concentration of modifier and the removal rate of chromium by modified …”

Section: Adsorption Effect Of Cr (Vi) At Different Modifier Dosagementioning

confidence: 99%

Gemini Surfactant-Modified Activated Carbon for Remediation of Hexavalent Chromium from Water

Zhou

Wang

Hursthouse

et al. 2018

Water

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Gemini surfactants, with double hydrophilic and hydrophobic groups, offer potentially orders of magnitude greater surface activity compared to similar single unit molecules. A cationic Gemini surfactant (Propyl didodecyldimethylammonium Bromide, PDDDAB) and a conventional cationic surfactant (Dodecyltrimethylammonium Bromide, DTAB) were used to pre-treat and generate activated carbon. The removal efficiency of the surfactant-modified activated carbon through adsorption of chromium(VI) was investigated under controlled laboratory conditions. Fourier-transform infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM) were used to investigate the surface changes of surfactant-modified activated carbon. The effect of important parameters such as adsorbent dosage, pH, ionic strength and contact time were also investigated. The chromium(VI) was adsorbed more significantly on the Gemini surfactant-modified activated carbon than on the conventional surfactant-modified activated carbon. The correlation coefficients show the data best fit the Freundlich model, which confirms the monolayer adsorption of chromium(VI) onto Gemini surfactant-modified activated carbon. From this assessment, the surfactant-modified (especially Gemini surfactant-modified) activated carbon in this study showed promise for practical applications to treat water pollution.

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“…pH of the solution has a significant impact on the uptake of heavy metals, since it determines the surface charge of the adsorbent, the degree of ionization and speciation of the adsorbent [20]. The effects of pH on metal ions adsorption have been studied by many researchers previously, and the results indicated that pH of solution exerts a great effect on uptake of metal ions [21,9].…”

Section: Effect Of Phmentioning

confidence: 99%

Adsorption Study on Mixture Material of Granite Residual Soil – Palm Oil Fuel Ash (POFA)

2017

MOJCE

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Granite residual soil mixed with up to 15% of palm oil fuel ash (POFA) by dry weight was investigated to ascertain its adsorption capacity with regards to its use as an adsorbent material for leachate. A batch equilibrium adsorption study was carried out in which the effect of dosage and pH on the adsorption capacity of granite residual soil -POFA mixture was determined. In general, the results showed that adsorbent dosage and pH had significant effect on the sorption capacity of the soil -POFA mixture. Such as example, Manganese ion which had the highest initial concentration of 18.23 mg/l in leachate, once gone through the shaking process, the amount which had been adsorbed by the admixture increased from 22.92 mg/g at 0% POFA content to 30.32 mg/g at 15% POFA. The increased pattern of adsorption capacity of the admixtures occurred with the increment of pH values. The optimum condition for the effectiveness sorption of contaminant for the mixture is 15% POFA content and pH values is 6. It can be concluded that the mixture granite residual soil-POFA is expected to be an economical adsorbent product for metal ion remediation in leachate. to Nik Daud and Mohammed [16]. Landfill leachate used in this study was collected from Jeram landfill sanitary, located in Kuala Selangor, Malaysia. Sample was collected directly from the pipes connected to the equalization lagoon and taken to the cold room in the laboratory for proper storage. Keywords: Batch Equilibrium AdsorptionBatch equilibrium adsorption tests (BEATs) were performed on the soil samples and the leachate to quantify the potential adsorption of some specified metal ions namely; Pb, Cr, Mn, Fe and Zn. The granite residual soil was mixed 5, 10 and 15% palm oil fuel ash (adsorbent) by dry weight of the soil. The test was carried out in accordance with procedure described by Shackelford and Daniel, (1991). The 1:4 ratio was maintained by adding 50g of soil -POFA mixture and 200g of solution (leachate) into a conical flask and the mixtures were placed in a table shaker (HS 500 Janke and Kunker, Ika-Werk) at a speed of 30 hub/mins. After shaking, samples were centrifuged at 50 RPM for 10 minute (model Kubota 5200) by using fabricated small column before obtaining the supernatant and keep it in a plastic bottle ( Figure 1).The solutions were analyzed using Atomic Absorption Spectrophotometer (AAS), model UNICAM 969. The amount of adsorption at equilibrium q e (mg/g) was calculated using equation (1).Where o C and e C (mg/l) are the initial and equilibrium concentration of metal ion solution, V is the volume of the solution in liters and m is the amount of mass of dry adsorbent used (g). Similarly, the percentage adsorption was determined by using Equation (2).( )Where o C and e C (mg/l) are the initial and equilibrium concentration of metal ion solution. Results and Discussion Materials PropertiesThe index properties of natural granite residual soil and mixture soil with 15% POFA have been tabulated in Table 1 Effect of Adsorbent DoseThe amount of palm oil...

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Adsorption of Pb(II) from aqueous solutions using activated carbon developed from Apricot stone

Cited by 182 publications

References 24 publications

Biosorption of cationic dye from aqueous solutions onto lignocellulosic biomass (Luffa cylindrica): characterization, equilibrium, kinetic and thermodynamic studies

Biosorption of cationic dye from aqueous solutions onto lignocellulosic biomass (Luffa cylindrica): characterization, equilibrium, kinetic and thermodynamic studies

Gemini Surfactant-Modified Activated Carbon for Remediation of Hexavalent Chromium from Water

Adsorption Study on Mixture Material of Granite Residual Soil – Palm Oil Fuel Ash (POFA)

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