Desorption of heavy metals from metal loaded sorbents and e-wastes: A review

Chatterjee, Ankita; Abraham, Jayanthi

doi:10.1007/s10529-019-02650-0

Cited by 103 publications

(44 citation statements)

References 72 publications

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“…Desorbents such as NaOH solution, ethanol, and methanol solutions are generally used for desorption to regenerate the biosorbent used in adsorption of dyes. 62,64 Generally, acid solutions are used as desorbents for heavy metal removal from heavy metal-loaded biosorbents. 10,62 The efficiency of heavy metal desorption has been determined using the following equation 62 C V q m % of heavy metal desorption 100…”

Section: Desorption Regeneration Efficiency and Disposal Of The Used ...mentioning

confidence: 99%

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

Medhi

Chowdhury

Baruah³

et al. 2020

ACS Omega

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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...

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Section: Desorption Regeneration Efficiency and Disposal Of The Used ...mentioning

confidence: 99%

“…62,64 Generally, acid solutions are used as desorbents for heavy metal removal from heavy metal-loaded biosorbents. 10,62 The efficiency of heavy metal desorption has been determined using the following equation 62 C V q m % of heavy metal desorption 100…”

Section: Desorption Regeneration Efficiency and Disposal Of The Used ...mentioning

confidence: 99%

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

Medhi

Chowdhury

Baruah³

et al. 2020

ACS Omega

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“…Regeneration of the sorbent is an important step in economically checking the feasibility of the sorption process [61]. Desorption assays from the spent sorbents were conducted with NaOH 0.1 M as the eluent agent [62], and the recovery yields ranged from 91.1 % (olive mill residue) to 78.4 % (citrus waste).…”

Section: Imazalil and Thiabendazole Sorptionmentioning

confidence: 99%

Adsorptive and Surface Characterization of Mediterranean Agrifood Processing Wastes: Prospection for Pesticide Removal

et al. 2021

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The sustainable management of biomass is a key global challenge that demands compliance with fundamental requirements of social and environmental responsibility and economic effectiveness. Strategies for the valorization of waste biomass from agrifood industries must be in line with sustainable technological management and eco-industrial approaches. The efficient bioremoval of the pesticides imazalil and thiabendazole from aqueous effluents using waste biomass from typically Mediterranean agrifood industries (citrus waste, artichoke agrowaste and olive mill residue) revealed that these residues may be transformed into cost-effective biosorbents. Agrifood wastes present irregular surfaces, many different sized pores and active functional groups on their surface, and they are abundant in nature. The surface and adsorptive properties of olive mill residue, artichoke agrowaste and citrus waste were characterized with respect to elemental composition, microstructure, crystallinity, pore size, presence of active functional groups, thermal stability, and point of zero charge. Olive mill residue showed the highest values of surface area (Brunauer–Emmett–Teller method), porosity, crystallinity index, and pH of zero point of charge. Olive mill residue showed the highest efficiency with sorption capacities of 9 mg·g−1 for imazalil and 8.6 mg·g−1 for thiabendazole.

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“…In order to check the reusability of the tested chelating acrylic copolymer, the Cu (II) desorption and the recycling of the sorbent have been studied in batch conditions (Figure 10). According to the literature findings, the desorbing agent, which the best fulfill the economic and ecological requirements is HCl [40]. Because of this, copper was desorbed from the metal loaded acrylic copolymer functionalized with amidoethyleneamine groups by using 0.1M HCl.…”

Section: Evaluation Of the Proposed Chelating Sorbentmentioning

confidence: 99%

Recyclable Functionalized Polymer for Cu(II) Decontamination from Aqueous Media

Tofan¹,

Wenkert²,

Bunia³

et al. 2021

Mater. Plast.

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In the endeavor to explore more and more materials, this work is focused on the study of the potential applicability of a chelating sorbent based on an acrylic copolymer functionalized with amidoethylenamine groups in Cu(II) removal from wastewaters in batch and dynamic conditions. The proposed sorbent was synthesized by the chemical transformation reaction of ethylacrylate (EA): acrylonitrile (AN):2% divinylbenzene (DVB) copolymer with ethylenediamine (EDA). Batch sorption results pointed out that the Cu(II) retention by the acrylic copolymer functionalized with amidoethylen-amine groups was dependent on the initial solution pH, initial metal concentration and contact time. The sorption of Cu (II) on the tested chelating copolymer obeyed both Langmuir and Freundlich isotherms. The Langmuir maximum sorption capacity was 65.21mg Cu (II)/g of polymer. The kinetic experimental data fitted well with the pseudo - second order model. The dynamic behavior of a fixed bed column filled with the acrylic copolymer functionalized with amidoethylenamine groups has been studied in terms of breakthrough curve. The experimental breakthrough data have been well described by Thomas model. The tested chelating copolymer is suitable for multiple processes of Cu(II) sorption-desorption. The column studies with real wastewater sample presented a removal efficiency of 100% for Cu (II) and a significant improvement of the wastewater quality. The acrylic copolymer functionalized with amidoethyleneamine groups can be successfuly applied for the Cu (II) removal - recovery - recycling.

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Desorption of heavy metals from metal loaded sorbents and e-wastes: A review

Cited by 103 publications

References 72 publications

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

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

Adsorptive and Surface Characterization of Mediterranean Agrifood Processing Wastes: Prospection for Pesticide Removal

Recyclable Functionalized Polymer for Cu(II) Decontamination from Aqueous Media

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