Adsorption: Fundamental aspects and applications of adsorption for effluent treatment

Lima, Éder C.; Dehghani, Mohammad Hadi; Guleria, Ashish; Sher, Farooq; Karri, Rama Rao; Dotto, Guilherme Luiz; Tran, Hai Nguyen

doi:10.1016/b978-0-323-85768-0.00004-x

Cited by 70 publications

(113 citation statements)

References 40 publications

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“…These results prove that the values of q t predicted by the GO model were the closest prediction to the experimentally obtained q t . 34 …”

Section: Resultsmentioning

confidence: 99%

“… 34 When 2 < ΔBIC < 6, the model with the lower BIC value has a prospective of being the best-fitted model. 34 When 6 < ΔBIC < 10, the model with the lower BIC value has a strong possibility of being the best-fitted model. 34 When ΔBIC ≥ 10, the model that presents the lower BIC value is certainly the best-fitted model.…”

Section: Resultsmentioning

confidence: 99%

“…The pseudo-first-order (PFO; eq 3 ), pseudo-second-order (PSO; eq 4 ), and general-order (GO; eq 5 ) kinetic models 34 were fitted to the kinetic data. …”

Section: Methodsmentioning

confidence: 99%

“…The Langmuir ( eq 6 ), Freundlich ( eq 7 ), and Liu ( eq 8 ) isotherm models were utilized to fit the equilibrium data. 34 …”

Section: Methodsmentioning

confidence: 99%

See 3 more Smart Citations

3-Aminopropyl-triethoxysilane-Functionalized Tannin-Rich Grape Biomass for the Adsorption of Methyl Orange Dye: Synthesis, Characterization, and the Adsorption Mechanism

et al. 2022

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A biomass amino silica-functionalized material was successfully prepared by a simple sol–gel method. 3-Aminopropyltriethoxysilane (APTES) was added to a tannin-rich grape residue to improve its physicochemical properties and enhance the adsorption performance. The APTES functionalization led to significant changes in the material’s characteristics. The functionalized material was efficiently applied in the removal of methyl orange (MO) due to its unique characteristics, such as an abundance of functional groups on its surface. The adsorption process suggests that the electrostatic interactions were the main acting mechanism of the MO dye removal, although other interactions can also take place. The functionalized biomass achieved a very high MO dye maximum adsorption capacity ( Q max ) of 361.8 mg g –1 . The temperature positively affected the MO removal, and the thermodynamic studies indicated that the adsorption of MO onto APTES-functionalized biomass was spontaneous and endothermic, and enthalpy is driven in the physisorption mode. The regeneration performance revealed that the APTES-functionalized biomass material could be easily recycled and reused by maintaining very good performance even after five cycles. The adsorbent material was also employed to treat two simulated dye house effluents, which showed 48% removal. At last, the APTES biomass-based material may find significant applications as a multifunctional adsorbent and can be used further to separate pollutants from wastewater.

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“…These results prove that the values of q t predicted by the GO model were the closest prediction to the experimentally obtained q t . 34 …”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…The pseudo-first-order (PFO; eq 3 ), pseudo-second-order (PSO; eq 4 ), and general-order (GO; eq 5 ) kinetic models 34 were fitted to the kinetic data. …”

Section: Methodsmentioning

confidence: 99%

“…The Langmuir ( eq 6 ), Freundlich ( eq 7 ), and Liu ( eq 8 ) isotherm models were utilized to fit the equilibrium data. 34 …”

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

3-Aminopropyl-triethoxysilane-Functionalized Tannin-Rich Grape Biomass for the Adsorption of Methyl Orange Dye: Synthesis, Characterization, and the Adsorption Mechanism

et al. 2022

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“…The following supporting information can be downloaded at: , Figure S1: Tora Hellwan area where real contaminated samples were collected; Figure S2: DrTG data for MCH and after functionalization (MCH-ATA); Figure S3: Speciation diagrams for Cd(II) under the experimental conditions that selected for the study of pH effect (calculation using Visual Minteq [ 61 ]; Figure S4: Variation in the pH (from 1–5) for MCH and MCH-ATA; Figure S5: Plotting of pH eq vs. Log10D at 20 and 50 °C; Figure S6: Kinetic modeling for PSORE of MCH (a) and MCH-ATA(b); Figure S7: Freundlich and Temkin equations for Cd(II) sorption on MCH (a) and MCH-ATA(b) sorbents; Figure S8: EDX analysis of the MCH-ATA sorbent after 5 cycles of sorption desorption; Figure S9: Desorption kinetics of MCH and MCH-ATA using 0.2MHCl solution; Figure S10: Comparison of the MCL levels for drinking water and Livestock drinking water for MCH-ATA at different pH values; Table S1a: Reminder on equations used for modeling uptake kinetics [ 62 , 63 , 64 ]; Table S1b: Reminder on equations used for modeling sorption isotherms; Table S2: Assignments of the metal concentration comparing with the MCL values for drinking water and livestock drinking water [ 63 , 65 , 66 , 67 ]; Table S3: Textural properties of MCH and MCH-ATA; Table S4: Elemental analysis of MCH and MCH-ATA sorbents.…”

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confidence: 99%

Grafting of Thiazole Derivative on Chitosan Magnetite Nanoparticles for Cadmium Removal—Application for Groundwater Treatment

et al. 2022

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The synthesis and developments of magnetic chitosan nanoparticles for high efficiency removal of the cadmium ions from aquatic medium are one of the most challenging techniques. Highly adsorptive composite (MCH-ATA) was produced by the reaction of chitosan with formaldehyde and amino thiazole derivative. The sorbent was characterized by FTIR, elemental analyses (EA), SEM-EDX, TEM analysis, TGA and titration (volumetric). The modified material includes high nitrogen and sulfur contents (i.e., 4.64 and 1.35 mmol g−1, respectively), compared to the pristine material (3.5 and 0 mmol g−1, respectively). The sorption was investigated for the removal of Cd(II) ions from synthetic (prepared) solution before being tested towards naturally contaminated groundwater in an industrial area. The functionalized sorbent shows a high loading capacity (1.78 mmol Cd g−1; 200 mg Cd g−1) compared to the pristine material (0.61 mmol Cdg−1; 68.57 mg Cd g−1), while removal of about 98% of Cd with capacity (6.4 mg Cdg−1) from polymetallic contaminated groundwater. The sorbent displays fast sorption kinetics compared to the non-modified composite (MCH); 30 min is sufficient for complete sorption for MCH-ATA, while 60–90 min for the MCH. PFORE fits sorption kinetics for both sorbents, whereas the Langmuir equation fits for MCH and Langmuir and Sips for MCH-ATA for sorption isotherms. The TEM analysis confirms the nano scale size, which limits the diffusion to intraparticle sorption properties. The 0.2 M HCl solution is a successful desorbing agent for the metal ions. The sorbent was applied for the removal of cadmium ions from the contaminated underground water and appears to be a promising process for metal decontamination and water treatment.

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Revisiting the calculation of thermodynamic parameters of adsorption processes from the modified equilibrium constant of the Redlich–Peterson model

Tran

Ninh

Lima

et al. 2022

J of Chemical Tech & Biotech

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BACKGROUND:The adsorption equilibrium constant of the Langmuir model (K L ; L mol −1 ) has been applied as the standard thermodynamic equilibrium constant, K o Eq , for calculating the thermodynamic parameters (ΔG°, ΔS°, and ΔH°) of an adsorption processes by using the van't Hoff equation. Some authors have (directly and indirectly) applied the constant K RP (L kg −1 ) of the Redlich-Peterson model for such calculations. However, this is an incorrect application because the unit of K RP is not suitable (it is not an equilibrium constant). Its new adsorption equilibrium constant, K e(RP) (L mol −1 ), was revisited based on a RP (L mol −1 ) g . In the literature, there is still uncertainty regarding the application of a RP as K o Eq for calculating the thermodynamic parameters. Therefore, the present study aimed to evaluate the feasibility of applying K e(RP) to calculate thermodynamic parameters using available literature data. The thermodynamic parameters obtained from K e(RP) were compared to those from K L . A case study using a biosorbent for adsorbing methylene blue dye at different temperatures was carried out to re-verify the feasibility. RESULTS:The Redlich-Peterson model is only valid when its exponent is in a strict range (0 ≤ g ≤ 1). The Redlich-Peterson model (68%; 227 observations collected from 52 published papers) describes adsorption equilibrium datasets better than the Langmuir model. The negative ΔG°values obtained based on K e(RP) (11.7-47.6 kJ mol −1 ) were significantly different (p = 2.98 × 10 −12 ) from those on K L (12.2-40.8 kJ mol −1 ). The magnitudes of ΔH°obtained based on K e(RP) were significantly different (P < 0.05) to those on K L ; however, such differences did not affect conclusions drawn on dominant mechanism adsorption (physical or chemical). The magnitude of ΔH°for chemisorption (involved in covalent bonds) is higher than 200 kJ mol −1 . For the case study, the ΔH°(kJ mol −1 ) and ΔS°[J mol −1 × K −1 ] values calculated based on K e(RP) (11.65 and 111.5) were like those on K L (11.34 and 110.4, respectively). CONCLUSION: A new equilibrium constant, K e(RP) (L mol −1 ), of the Redlich-Peterson model can be applied as K o Eq for calculating the thermodynamic parameters (ΔG°, ΔS°, and ΔH°) of an adsorption processes under specific cases (i.e., F, H, and L-shaped adsorption isotherms). Most of the adsorption processes (98%) involve physical adsorption.

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Adsorption: Fundamental aspects and applications of adsorption for effluent treatment

Cited by 70 publications

References 40 publications

3-Aminopropyl-triethoxysilane-Functionalized Tannin-Rich Grape Biomass for the Adsorption of Methyl Orange Dye: Synthesis, Characterization, and the Adsorption Mechanism

3-Aminopropyl-triethoxysilane-Functionalized Tannin-Rich Grape Biomass for the Adsorption of Methyl Orange Dye: Synthesis, Characterization, and the Adsorption Mechanism

Grafting of Thiazole Derivative on Chitosan Magnetite Nanoparticles for Cadmium Removal—Application for Groundwater Treatment

Revisiting the calculation of thermodynamic parameters of adsorption processes from the modified equilibrium constant of the Redlich–Peterson model

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