Adsorption processes for the removal of contaminants from wastewater

Sahoo, Tapas Ranjan; Prelot, Bénédicte

doi:10.1016/b978-0-12-818489-9.00007-4

Cited by 222 publications

(120 citation statements)

References 277 publications

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“…These observed values were higher compared with other reported biosorbents, such as orange and banana peels [29], jackfruit leaf [11], pinus durangensis sawdust [30], tea waste [31] and Lathyrus sativus husk [19], but were smaller than other adsorbents, such as activated carbon [32]. As the pore volumes were found to be less than 20 Å, CCSs and CCPs are considered predominately microporous materials, according to IUPAC classification [33].…”

Section: Surface Areamentioning

confidence: 73%

“…Adsorption isotherms generally describe the nature of interactions between adsorbates and adsorbents by establishing the relationship linking the quantity of the dye adsorbed and the dye concentration remaining in the solution at equilibrium (q e and C e respectively) at a constant temperature and pH to evaluate the adsorbents' capacities [33].…”

Section: Isotherm Studiesmentioning

confidence: 99%

“…The Freundlich model could not fit well to the adsorption of MB onto CCPs based on the R 2 value (0.9456). The high value of the Langmuir model correlation coefficient postulates that the adsorption process was monolayer, reversible at the homogenous adsorbent surface with no lateral interaction between the adsorbate molecules [33]. Furthermore, the Temkin model correlation coefficient was greater than 0.95, suggesting that electrostatic interactions describing a chemical process are involved in the adsorption mechanism between MB and CCPs [31].…”

Section: Isotherm Studiesmentioning

confidence: 99%

See 2 more Smart Citations

Investigation of Seeds and Peels of Citrullus colocynthis as Efficient Natural Adsorbent for Methylene Blue Dye

Alghamdi

Mannoubi

2021

Processes

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Natural adsorbents as low-cost materials have been proved efficient for water remediation and have significant capacity for the removal of certain chemicals from wastewater. The present investigation aimed to use Citrullus colocynthis seeds (CCSs) and peels (CCPs) as an efficient natural adsorbent for methylene blue (MB) dye in an aqueous solution. The examined biosorbents were characterized using surface area analyzer (BET), scanning electron microscope (SEM), thermogravimetric analyzer (TGA) and Fourier transform infra-red (FT-IR) spectroscopy. Batch adsorption experiments were conducted to optimize the main factors influencing the biosorption process. The equilibrium data for the adsorption of MB by CCSs were best described by the Langmuir isotherm followed by the Freundlich adsorption isotherms, while the equilibrium data for MB adsorption by CCPs were well fitted by the Langmuir isotherm followed by the Temkin isotherm. Under optimum conditions, the maximum biosorption capacity and removal efficiency were 18.832 mg g−1 and 98.00% for MB-CCSs and 4.480 mg g−1 and 91.43% for MB-CCPs. Kinetic studies revealed that MB adsorption onto CCSs obeys pseudo-first order kinetic model (K1 = 0.0274 min−1), while MB adsorption onto CCPs follows the pseudo-second order kinetic model (K2 = 0.0177 g mg−1 min−1). Thermodynamic studies revealed that the MB biosorption by CCSs was endothermic and a spontaneous process in nature associated with a rise in randomness, but the MB adsorption by CCPs was exothermic and a spontaneous process only at room temperature with a decline in disorder. Based on the obtained results, CCSs and CCPSs can be utilized as efficient, natural biosorbents, and CCSs is promising since it showed the highest removal percentage and adsorption capacity of MB dye.

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Section: Surface Areamentioning

confidence: 73%

Section: Isotherm Studiesmentioning

confidence: 99%

Section: Isotherm Studiesmentioning

confidence: 99%

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Investigation of Seeds and Peels of Citrullus colocynthis as Efficient Natural Adsorbent for Methylene Blue Dye

Alghamdi

Mannoubi

2021

Processes

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“…In the systems studied, Pb(II) has a much larger radius of the hydrated ion, which simplifies its diffusion into the pores of the zeolite and effective ion exchange with, e.g., Mg and Ca cations. As a result, a considerable increase in Pb(II) adsorption is observed [44,45].…”

Section: Adsorption Capacity Of Hic Fa Zeolite-carbon Composite and Pure Zeolite Relative To Zn(ii)/pb(ii) Ions In The Single Adsorbate Smentioning

confidence: 99%

Comparison of Physicochemical Properties of Fly Ash Precursor, Na-P1(C) Zeolite–Carbon Composite and Na-P1 Zeolite—Adsorption Affinity to Divalent Pb and Zn Cations

et al. 2021

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Considering the growing needs of environmental remediation, new effective solutions should be sought. Therefore, the adsorbed amounts of heavy metal ions, such as lead(II) and zinc(II), on the surface of high-carbon fly ash (HiC FA), zeolite-–carbon composite (Na-P1(C)) and pure zeolite (Na-P1), were investigated. The applied solids were characterized using the following techniques: XRD, SEM-EDS, TEM, porosimetry, SLS, electrophoresis and potentiometric titration. The heavy metal concentration in the probes was determined by applying ICP-OES spectroscopy. Adsorption/desorption and electrokinetic measurements were performed in the systems containing one or two adsorbates. The obtained results indicated that Pb(II) ions are adsorbed in larger amounts on the investigated solid surface due to the molecular sieving effect. The largest adsorption capacity relative to lead(II) ions was observed for pure Na-P1 zeolite (407 mg/g). The simultaneous presence of Pb(II) + Zn(II) mixed adsorbates minimally affects the amount of adsorbed Pb(II) ions and causes a significant decrease of Zn(II) ion adsorption (in comparison with analogous systems containing single adsorbates). It was also shown that all solids can be efficiently regenerated using hydrochloric acid. Thus, the selected pure zeolite can be successfully applied in soil remediation or other purifying technologies as an effective Pb(II) adsorbent.

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“…All models are defined by different parameters that appear in their characteristic equations (Table 2). Since these equations are non-linear, they were linearized [24,26]. The SOLVER tool of the MS Excel program was used to carry out the regressions of the experimental data.…”

Section: Adsorption Isothermsmentioning

confidence: 99%

Characterization of Ionic Exchange and Macroporous Resins for Their Application on the Separation and Recovery of Chlorogenic Acid from the Wastewater of Artichoke Blanching

Rodriguez-Lopez

Reig

Mayor³

et al. 2021

Sustainability

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Food wastes have traditionally been considered as dead-end materials; however, recent international, national, and regional policies strongly promote the use of these wastes as potential resources. This change of perception considers the need for sustainable exploitation of natural resources. In this context, artichoke processing produces high amounts of wastewaters, and specifically, wastewaters from the artichoke blanching step present a high content of valuable biocomponents such as carbohydrates and phenolic compounds (e.g., chlorogenic acid, 1700 ppm). In this work, the recovery of chlorogenic acid by applying sorption processes was studied. Five resins were tested, and it was found that the resin XAD 7 HP presented the best total adsorption-desorption yield (72.8%) at 20 °C. It was also found that there was a strong variation of the adsorption ratio depending on solution pH (3–7). Four models of isotherms were applied to the adsorption processes, and the Langmuir isotherm better explained the adsorption behavior. The kinetic study showed that the adsorption and desorption of chlorogenic acid followed a pseudo-second order model where the kinetic constant depended on the adsorbate concentration. In addition, it was found that the sorption process was controlled by more than just the intraparticle diffusion mechanism.

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Adsorption processes for the removal of contaminants from wastewater

Cited by 222 publications

References 277 publications

Investigation of Seeds and Peels of Citrullus colocynthis as Efficient Natural Adsorbent for Methylene Blue Dye

Investigation of Seeds and Peels of Citrullus colocynthis as Efficient Natural Adsorbent for Methylene Blue Dye

Comparison of Physicochemical Properties of Fly Ash Precursor, Na-P1(C) Zeolite–Carbon Composite and Na-P1 Zeolite—Adsorption Affinity to Divalent Pb and Zn Cations

Characterization of Ionic Exchange and Macroporous Resins for Their Application on the Separation and Recovery of Chlorogenic Acid from the Wastewater of Artichoke Blanching

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