Utilization of low-cost sugarcane waste for the adsorption of aqueous Pb(II): Kinetics and isotherm studies

Hashem, A.; Aniagor, Chukwunonso O.; Taha, Ghada M.; Fikry, Mohammad

doi:10.1016/j.crgsc.2021.100056

Cited by 43 publications

(28 citation statements)

References 61 publications

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“…Concerns about water scarcity seen in different parts of the world are constantly increasing as a result of the continuous pollution of existing waters by various factors. Among these factors are chemical compounds like dyes [ 1 ], pesticides [ 2 ], heavy metals [ 3 ], drugs and emerging contaminants [ 4 ] which are the leading factors that pollute the ecosystem. These substances are released into the environment via industrial, hospital or domestic wastewater [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of high surface area mesoporous ZnCl2–activated cocoa (Theobroma cacao L) leaves biochar derived via pyrolysis for crystal violet dye removal

Jabar

Adebayo²,

Owokotomo³

et al. 2022

Heliyon

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Section: Introductionmentioning

confidence: 99%

Synthesis of high surface area mesoporous ZnCl2–activated cocoa (Theobroma cacao L) leaves biochar derived via pyrolysis for crystal violet dye removal

Jabar

Adebayo²,

Owokotomo³

et al. 2022

Heliyon

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“…When the pH of the solution is higher than pH PZC , the DSD surface will be negatively charged, and vice versa [34]. This can also provide insight into the role of electrostatic interactions in the adsorption mechanism [35]. In this study, the adsorption experiments of isotherm were performed at pH = 7.0, implying that the DSD's surface was mostly positively charged and the ion exchange can occur.…”

Section: Characterization Of Dsd Samplesmentioning

confidence: 92%

“…In this work, Langmuir, Freundlich, Redlich-Peterson, and Liu isotherm models were employed to investigate the adsorption behavior of CV dye onto DSD adsorbent. The adsorption isotherms at three temperature values (20,35, and 50 • C) are presented in Figure 7b. As observed, the temperature remarkably influenced the dye-binding capacity, and the adsorption is favored at high values of temperature.…”

Section: Isotherm Behaviorsmentioning

confidence: 99%

Development of a Novel Adsorbent Prepared from Dredging Sediment for Effective Removal of Dye in Aqueous Solutions

et al. 2021

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This study proposed a novel and low-cost adsorbent prepared from dredging sediment (DSD) for effective removal of dye in aqueous solutions. The adsorption efficiency and behavior of the DSD adsorbent toward the crystal violet (CV), a cationic dye, were investigated via batch experiments. The results showed that DSD samples contain mainly clay minerals (illite and kaolinite) and other mineral phases. In addition, DSD is a mesoporous material (Vmesopore = 94.4%), and it exhibits a relatively high surface area (~39.1 m2/g). Adsorption experiments showed that the solution’s pH slightly affects the adsorption process, and a pH of 11 gave a maximum capacity of 27.2 mg/g. The kinetic data of CV dye adsorption is well described by the pseudo–second-order and the Avrami models. The Langmuir and Liu isotherm models provide the best fit for the adsorption equilibrium data. The monolayer adsorption capacity of Langmuir reached 183.6, 198.0, and 243.6 mg/g at 293, 308, and 323 K, respectively. It was also found that the adsorption process was spontaneous (−ΔG°), exothermic (−∆H°), and increased the randomness (+∆S°) during the adsorption operation. The primary mechanisms in CV dye adsorption were ion exchange and pore filling, whereas electrostatic attraction was a minor contribution. In addition, three steps involving intraparticle diffusion occur at the same time to control the adsorption process. The results of this study highlight the excellent efficiency of DSD material as an ecofriendly sorbent for toxic dyes from water media.

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“…According to Nwosu, et al [50], pHPZC is the pH value at which a given adsorbents' surface possesses a net neutral charge. Studies [51,52] have also shown that at adsorbate solution pH values higher than the pHPZC, the adsorbent surface will be predominately negative and vice versa [53]. From Figure 3a, the pHPZC of AC was recorded at pH 4.1, an indication of the relative surface acidity of the AC.…”

Section: Point Of Zero Charge (Phpzc) and The Effect Of Phmentioning

confidence: 92%

Equilibrium and Kinetic Modelling of Aqueous Cadmium Ion and Activated Carbon Adsorption System

Aniagor

Elshkankery

Fletcher

et al. 2021

Water Conserv Sci Eng

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Despite their extensive and decade long application in wastewater treatment, activated carbon remains one of the most viable adsorbents, with substantive practical application, due to their high pollutant binding capacity. In this study, commercially available activated charcoal was applied in the uptake of aqueous cadmium [Cd(II)] ion. The effect of some process variables on the Cd (II) uptake was investigated via batch mode. Furthermore, the adsorbents' surface charge (pHPZC), surface morphology (using SEM) and available surface functional groups (using FTIR) were explained. The pH dependence of the present adsorption system was revealed, with the optimum pH was recorded at pH 5.0. Similarly, the Cd (II) uptake (mg/g) decreased with increasing adsorbent dosage due to possible active sites clogging, overcrowding and interference Furthermore, the isothermal and kinetics analyses of the experimental data, that were aptly validated using the hybrid error model, respectively depicted the Langmuir isotherm and pseudosecond-order kinetic model as the best fit. A Langmuir adsorption capacity of 682.5 mg g -1 was also recorded in the study. Consequently, the present adsorption system was characterized by an equilibrium timeframe of industrial practicability, hence the adsorbent was successfully applied for the aqueous Cd (II) uptake.

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Utilization of low-cost sugarcane waste for the adsorption of aqueous Pb(II): Kinetics and isotherm studies

Cited by 43 publications

References 61 publications

Synthesis of high surface area mesoporous ZnCl2–activated cocoa (Theobroma cacao L) leaves biochar derived via pyrolysis for crystal violet dye removal

Synthesis of high surface area mesoporous ZnCl2–activated cocoa (Theobroma cacao L) leaves biochar derived via pyrolysis for crystal violet dye removal

Development of a Novel Adsorbent Prepared from Dredging Sediment for Effective Removal of Dye in Aqueous Solutions

Equilibrium and Kinetic Modelling of Aqueous Cadmium Ion and Activated Carbon Adsorption System

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