Biosorption of As(III) and As(V) on the surface of TW/MnFe2O4 composite from wastewater: kinetics, mechanistic and thermodynamics

Podder, M.S.; Majumder, C. B.

doi:10.1007/s13201-016-0487-z

Cited by 24 publications

(9 citation statements)

References 89 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A single linear Weber–Moris plot ( q t versus t 1/2 ) depicted the adsorption process to have been controlled by intraparticle diffusion only. However, the experimental data are most likely to exhibit multilinear plots, which describe the involvement of more than two steps in the adsorption process. , The experimental data actually yield multilinear plots, as in Figure D (green line), and hence the adsorption process involving more than two steps and simple intraparticle diffusion could no longer be described as the only rate-controlling step. There are almost four steps involved in the adsorption process as observed from the multilinear plot, Figure D .…”

Section: Results and Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Kinetics of Aqueous Cu(II) Biosorption onto Thevetia peruviana Leaf Powder

Medhi

Chowdhury

Baruah³

et al. 2020

ACS Omega

View full text Add to dashboard Cite

Copper is an essential micronutrient; however, as a result of its increasing demand, subsequent mining followed by its direct discharge into the environment has led to the contamination of our ecosystem. Thevetia peruviana (TP) is an ornamental herb of medicinal interest and is extensively used as an antipyretic and anticancer agent due to the presence of cardiac glycosides. In this work, we have explored the TP leaf powder as a biosorbent for Cu(II) removal from aqueous media and observed that it yields better results in comparison to other reported biosorbents for the removal of Cu(II). This work also emphasizes on the biosorption kinetics along with its plausible mechanism of interactions. The leaf powder characterized by FT-IR spectroscopy confirmed the diverse surface functionalities including hydroxyl, carbonyl, glycosides, etc. The morphology and elemental composition of the plant material have been investigated using SEM-EDAX analysis that confirms the heterogeneity and porosity of the biosorbent surface. The encouraging results revealed that the TP leaf powder could be used as a cost-effective biosorbent with an adsorption capacity of 187.51 mg g −1 for Cu(II) in aqueous media at pH ∼ 5 and a temperature of 303 K. The complex functionality of the TP surface most likely played a significant role in attaining fast equilibrium within 60 min by following pseudo-second-order kinetics, having a rate constant of 2 × 10 3 mg g −1 min −1 that has been confirmed with statistical tools such as regression coefficient, chi-squared, and sum of error square tests. The adsorption mechanism is controlled by diffusion of Cu(II) from the liquid phase to the solid phase of the TP biosorbent followed by the chemical interaction between the biosorbent and the adsorbate with slow intraparticle diffusion on the biosorbent surface. The adsorption of Cu(II) on TP has been observed to rise from 59.29 to 197.63 mg g −1 with the rise in the pH of the medium from 2 to 7. The adsorption of Cu(II) has been found to increase from 176.80 to 191.33 mg g −1 with increasing temperature from 293−308 K, confirming the endothermic nature of the adsorption process. The thermodynamic study revealed the adsorption process to be spontaneous with negative ΔG (−10.43 to −13.74 kJ mol −1 ) and that it has an endothermic nature with positive ΔH (54.24 kJ mol −1 ). The isotherm study for Cu(II) on TP followed the Langmuir adsorption isotherm model with the maximum monolayer adsorption capacity of 303.03 mg g −1 rather than Freundlich and Temkin isotherm models, which confirmed the chemical interaction between the sorbent and sorbate. FT-IR and SEM-EDAX analyses have also been used to confirm the adsorption of Cu(II) onto the TP surface. The present study revealed 99.7% Cu(II) desorption using 0.8 N HCl as the desorbent accompanied by a 69.71% regeneration efficiency of the TP biosorbent. After desorption of Cu(II), the regenerated TP could be disposed of in soil. The encouraging results revealed that TP could be used as an alternative and low-cost bios...

show abstract

Section: Results and Discussionmentioning

confidence: 99%

“…The intercept of the M 4 plot, Figure 4E, is 1.18 > 0 but comparatively less than that of the M 3 model, indicating that M 4 might have a greater role in the kinetics than M 3 . 58 2.3.2.5.3. Elovich model.…”

Section: Morphology and Elementalmentioning

confidence: 99%

Kinetics of Aqueous Cu(II) Biosorption onto Thevetia peruviana Leaf Powder

Medhi

Chowdhury

Baruah³

et al. 2020

ACS Omega

View full text Add to dashboard Cite

show abstract

“…The peak representing C-O stretching of alcohol and carboxylic acid at 1051 cm −1 shifted to 1029 cm −1 and 1028 cm −1 for As(III) and As(V) treated biomass, respectively [52]. The sharp peak at 1562 cm −1 indicated N-H bending vibrations in primary and secondary amines and amides [53]. A band at 1622 cm −1 represents the aromatic ring structure such as in the lignin aromatic group [40].…”

Section: Characterization Of Plpmentioning

confidence: 98%

As(III) and As(V) remediation in an aqueous medium using a cellulosic biosorbent: kinetics, equilibrium, and thermodynamics study

Choudhary

Bhattacharyya

2020

SN Appl. Sci.

View full text Add to dashboard Cite

Arsenic is an element of concern, as it is widely distributed in the environment and poses a great threat to the health of humans and other living beings. The present study investigates the uptake of arsenite (As(III)) and arsenate (As(V)) ions from aqueous solution using low-cost Polyalthia longifolia leaf powder (PLP). The low-cost adsorbent was characterized by FTIR and SEM-EDX measurements. Adsorption experiments were carried out, with contact time, pH, adsorbent amount, the concentration of As(III) and As(V) and co-existing anions (PO 4 3− and BO 3 3−) as the variables. Maximum adsorption of As(III) and As(V) was found at pH 7.5 and 3.0, respectively. The presence of PO 4 3− and BO 3 3− was found to be sufficient for the uptake of As(III) and As(V), respectively. Adsorption of both As(III) and As(V) on PLP was found to follow the pseudo-second-order kinetic model. Freundlich, Langmuir, and Temkin models of adsorption were tested for adsorption of As(III) and As(V) on PLP, and the results indicated that adsorption data closely followed the Langmuir model. The maximum adsorption capacity for As(III) and As(V) was 1.76 mg g −1 and 1.87 mg g −1 , respectively, under the experimental conditions. Thermodynamic analysis showed that the process of adsorption of both As(III) and As(V) on PLP was spontaneous and exothermic with decreasing degrees of freedom. The results indicated that PLP-As(III) and PLP-As(V) interaction equilibria were efficient and therefore could be explored for practical applications.

show abstract

“…The D ef values are between 10 −6 and 10 −7 cm 2 s −1 ( Table 6), showing that the intraparticle diffusion was not the only rate controlling step of the process [55]. Additionally, the interactions of sorbent with sorbate, together with factors such as the soil properties, pore size distribution, electronic field, the interaction of van der Waals forces type, and the characteristics of ++the surface, can influence the diffusion process and affect the D ef value [49,56].…”

Section: External Diffusion Modelmentioning

confidence: 99%

Sorption of Organic Pollutants onto Soils: Surface Diffusion Mechanism of Congo Red Azo Dye

et al. 2020

View full text Add to dashboard Cite

For the protection of human and ecological receptors from the effects of soil pollution with chemical compounds, we need to know the behavior and transport of pollutants in soil. This work investigated the Congo red (CR) acid dye sorption on three natural soils collected from central and northeastern regions of Romania, symbolized as IS-65, IS-T, and MH-13. To define the mechanism of sorption and identify the rate governing step, various diffusion models such as Weber–Morris intraparticle diffusion, Boyd, film and pores diffusion, and mass transfer analysis have been verified. The intraparticle diffusion analysis of Congo red sorption onto soils has been described by a multi-linear plots, showing that the sorption process takes place by surface sorption and intraparticle diffusion in macro, meso, and micropores. The values of intraparticle diffusion coefficient kid increased with any rise of the initial concentration of pollutant. The results show that the values of pore diffusion coefficient (Dp) and film diffusion coefficient (Df) are found to be from 10−8 to 10−10 cm2 s−1, indicating that film diffusion influences the sorption rate limiting step. The intraparticle diffusion analysis shows that the plots did not pass through the origin and have two distinct parts, confirming that intraparticle diffusion is not the single determining mechanism involved in the sorption of Congo red on soils IS-65, IS-T, and MH-13. The results revealed that the sorption process has a complex nature, since both external diffusion and internal diffusion are involved in the sorption of CR from solution onto the investigated soils.

show abstract

Biosorption of As(III) and As(V) on the surface of TW/MnFe2O4 composite from wastewater: kinetics, mechanistic and thermodynamics

Cited by 24 publications

References 89 publications

Kinetics of Aqueous Cu(II) Biosorption onto Thevetia peruviana Leaf Powder

Kinetics of Aqueous Cu(II) Biosorption onto Thevetia peruviana Leaf Powder

As(III) and As(V) remediation in an aqueous medium using a cellulosic biosorbent: kinetics, equilibrium, and thermodynamics study

Sorption of Organic Pollutants onto Soils: Surface Diffusion Mechanism of Congo Red Azo Dye

Contact Info

Product

Resources

About