Adsorptive Removal of Heavy Metals from Aqueous Solution with Environmental Friendly Material—Exhausted Tea Leaves

Shrestha, Bindra; Kour, Jagjit; Ghimire, Kedar Nath

doi:10.4236/aces.2016.64046

Cited by 22 publications

(3 citation statements)

References 32 publications

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“…With regards to Table 7 , a comparison of the three biosorbents studied in the present study shows that the ascending order of the sorption capacity is: the shells of C. glaucum , scales of O. mykiss and scales of R. kutum . Given that the preparation methods and experimental conditions were the same for all three sorbents, these differences in adsorption capacities are probably mostly arose from the differences in surface area, morphology and functional groups 117 , 118 . On the other side, according to Regine et al 119 the role of the functional groups in biosorption of a given metal by a certain biosorbent is related to several factors, including accessibility of the reactive sites, the number of the sites in the biosorbent, chemical state of the sites (i.e.…”

Section: Discussionmentioning

confidence: 99%

Removal of lead from aqueous solutions using three biosorbents of aquatic origin with the emphasis on the affective factors

Rezaei

Pourang

Moradi

2022

Sci Rep

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The biosorptive potentials of three aquatics-based biosorbents, including shells of a bivalve mollusk and scales of two fish species for Pb removal from aqueous solutions were evaluated, for the first time. A Box–Behnken design with the response surface methodology was used to investigate the effects of the seven important variables (contact time, temperature, initial concentration, dosage, size, salinity and pH) on the sorption capacity of the sorbents. Among the seven studied factors, the effects of biosorbent dosage, initial concentration and pH were significant for all the response variables, while biosorbent size was not significant for any of the responses. The initial concentration was the most influential factor. The presence of Pb ions on the surfaces of the biosorbents after the adsorption was clearly confirmed by the SEM–EDX and XRF analyses. The maximum sorption capacities of the biosorbents were comparable to the literature and the descending order was as follows: scales of Rutilus kutum and Oncorhynchus mykiss and the shells of Cerastoderma glaucum. The isotherm studies revealed Langmuir model applicability for the Pb adsorption by R. kutum and O. mykiss scales, while Freundlich model was fitted to the adsorption C. glaucum shells.

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Section: Discussionmentioning

confidence: 99%

Removal of lead from aqueous solutions using three biosorbents of aquatic origin with the emphasis on the affective factors

Rezaei

Pourang

Moradi

2022

Sci Rep

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“…Any more increase in pH upon 7 caused precipitation of the metal's hydroxides. This precipitation is un preferred as adsorption process will not occur 32 . Fig.…”

Section: Effect Of Ph On Adsorptionmentioning

confidence: 99%

Removal of Zn, Pb, and Ni heavy metals from aqueous system using efficient modified-banana peel adsorbent

Gahlan¹,

Hosny²,

Fathi³

et al. 2023

10.5267/j.ccl

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Heavy metals contamination of water is a serious and complex environmental problem due to rapid industrialization, bioaccumulation and non-degradability. Therefore, the reuse of agricultural waste in the process of purifying water from pollutants is an attractive and promising method. Almost inexpensive materials are used to purify water, thus achieving the desired economic and environmental goal. In this study banana peel (BP) was used before and after modification by 0.1M sulphuric acid (H2SO4) to enhance the removal of Zinc Zn(II), Lead Pb(II) and Nickel Ni(II). The effect of various parameters was studied Such as pH, contact time, adsorbent dosage and initial metal ion concentration at 5 ppm. All these parameters were studied in batch experiments for a comparative study. The removal percentage was found to be 84% Zn (II),78%Pb (II) and 72% Ni (II) before modification and 92% Zn (II) , 94% Pb (II) and 96% Ni (II) after modification at initial concentration of 5 ppm. The data obtained from sorption isotherms were described with Langmuir and Freundlich isotherm models but were found to be well fitted for the Langmuir model. The correlation coefficient values R2 for Langmuir were at the range (0.996-0.999) while that for Freundlich were at the range (0.912-0.972). The rate of adsorption follows Pseudo-second-order kinetics. This work proved the high banana peels efficiency as an adsorbent agent for heavy metals removal from aqueous solutions.

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“…With regards to Table 7, a comparison of the three biosorbents studied in the present study shows that the ascending order of the sorption capacity is: the shells of C. glaucum, scales of O. mykiss and scales of R. kutum. Given that the preparation methods and experimental conditions were the same for all three sorbents, these differences in adsorption capacities are probably mostly arose from the differences in surface area, morphology and functional groups (Shrestha et al 2016;Naik et al 2017). On the other side, according to Regine et al (2000) the role of the functional groups in biosorption of a given metal by a certain biosorbent is related to several factors, including accessibility of the reactive sites, the number of the sites in the biosorbent, chemical state of the sites (i.e.…”

Section: Comparison With Other Aquatics-based Biosorbentsmentioning

confidence: 99%

Removal of Lead From Aqueous Solutions Using Three Biosorbents of Aquatic Origin: Evaluating the Relative Roles of Factors Affecting the Biosorption Process

Rezaei

Pourang

Moradi

2021

Preprint

View full text Add to dashboard Cite

The biosorptive potentials of three aquatics-based biosorbents, including shells of a bivalve mollusk and scales of two fish species for Pb removal from aqueous solutions were evaluated, for the first time. A Box–Behnken design with the response surface methodology was used to investigate the effects of the seven important variables (contact time, temperature, initial concentration, dosage, size, salinity and pH) on the sorption capacity of the sorbents. Among the seven studied factors, the effects of biosorbent dosage, initial concentration and pH were significant for all the response variables, while biosorbent size was not significant for any of the responses. The initial concentration was the most influential factor. The presence of Pb ions on the surfaces of the biosorbents after the adsorption was clearly confirmed by the SEM-EDX and XRF analyses. The maximum sorption capacities of the biosorbents were comparable to the literature and the descending order was as follows: scales of Rutilus kutum and Oncorhynchus mykiss and the shells of Cerastoderma glaucum. The isotherm studies revealed Langmuir model applicability for the Pb adsorption by R. kutum scales and C. glaucum shells, while Freundlich model was fitted to the adsorption by O. mykiss scales.

show abstract

Adsorptive Removal of Heavy Metals from Aqueous Solution with Environmental Friendly Material—Exhausted Tea Leaves

Cited by 22 publications

References 32 publications

Removal of lead from aqueous solutions using three biosorbents of aquatic origin with the emphasis on the affective factors

Removal of lead from aqueous solutions using three biosorbents of aquatic origin with the emphasis on the affective factors

Removal of Zn, Pb, and Ni heavy metals from aqueous system using efficient modified-banana peel adsorbent

Removal of Lead From Aqueous Solutions Using Three Biosorbents of Aquatic Origin: Evaluating the Relative Roles of Factors Affecting the Biosorption Process

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