Removal of heavy metals from aqueous solutions using <i>Eucalyptus Camaldulensis</i>: An alternate low cost adsorbent

Gebretsadik, Hirut; Gebrekidan, Abraha; Demlie, Libargachew

doi:10.1080/23312009.2020.1720892

Cited by 62 publications

(24 citation statements)

References 30 publications

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“…Smaller particle size provides high rates of adsorption as a result of transfer of heavy metals through shorter pathways inside the adsorbent particle pores [49]. In a previous study, Cr removal from an aqueous solution declined from 70% to 13.6%, when the Eucalyptus Camaldulensis particle size increased from 0.063 mm to 2 mm [50], which is consistent with our findings. Higher BET surface area obtained for PWD compared to CWB is another reason for higher adsorption rate and capacity of PWB, as suggested in the literature [51].…”

Section: Linearized and Non-linearized Freundlich Isothermssupporting

confidence: 91%

Adsorption of Lead(II), Manganese(II), and Copper(II) onto biochar in landfill leachate: implication of non-linear regression analysis

Zand

Abyaneh

2020

Preprint

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The feasibility of using wood-derived biochar (BC) to remove Pb, Mn, and Cu from landfill leachate was investigated and modeled in this study. The effect of contact time, biochar dosage and particle size on adsorption of the heavy metals onto BC was examined. BC was used in two form i.e. pulverized (PWB) and crushed (CWB) to evaluate the effect of BC particle size on adsorption characteristics. Biochar was produced under the pyrolytic temperature of 740 °C. The kinetics of Pb, Mn, and Cu adsorption onto PWB and CWB were assessed using the pseudo second-order and Elovich models, where both applied models could well describe the adsorption kinetics. Removal rates of the heavy metals were raised by 1.2, 1.4, and 1.6 times, respectively, for Pb, Mn, and Cu, when PWB content of the leachate increased from 0.5 to 5 g L -1 . Equilibrium adsorption capacity of the heavy metals onto BC in leachate system was evaluated using the Langmuir, non-linearized Freundlich, linearized Freundlich, and Temkin isotherms and found to have the following order for PWB: Non-linearized Freundlich>Temkin>Langmuir>Linearized Freundlich. The Langmuir and linearized Freundlich models could not adequately represent adsorption of the heavy metals onto biochar, especially for CWB. The highest removal of 87.96% was obtained for Pb, while the greatest adsorption intensity was found to be 1.58 mg g -1 for Mn. Using the non-linearized Freundlich isotherm significantly reduced adsorption prediction error. The adsorption affinity of PWB for Pb, Mn, and Cu was greater than CWB in all treatments. Wood-derived biochar is suggested to be used for the removal of heavy metals from landfill leachate as an economical adsorbent.

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Section: Linearized and Non-linearized Freundlich Isothermssupporting

confidence: 91%

Adsorption of Lead(II), Manganese(II), and Copper(II) onto biochar in landfill leachate: implication of non-linear regression analysis

Zand

Abyaneh

2020

Preprint

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“…Smaller particle size provides high capability of adsorption as a result of transfer of heavy metals through shorter pathways inside the adsorbent particle pores [48]. In a previous study, Cr removal from an aqueous solution declined from 70 to 14%, when the Eucalyptus Camaldulensis particle size increased from 0.063 to mm [49], which is consistent with our findings. Higher BET surface area obtained for PWD compared to CWB is another reason for higher adsorption efficiency and capacity of PWB, as suggested in the literature [50].…”

Section: Linearized and Non-linearized Freundlich Isothermssupporting

confidence: 91%

Adsorption of Lead, Manganese, and Copper onto biochar in landfill leachate: implication of non-linear regression analysis

Zand

Abyaneh

2020

Preprint

View full text Add to dashboard Cite

The feasibility of using wood-derived biochar (BC) to remove Pb, Mn, and Cu from landfill leachate was investigated and modeled in this study. BC was produced under the pyrolytic temperature of 740 °C. The effect of contact time, BC dosage and particle size on adsorption of the heavy metals onto BC was examined. BC was used in two forms i.e., pulverized (PWB) and crushed (CWB) to evaluate the effect of BC particle size on adsorption characteristics. The kinetics of Pb, Mn, and Cu adsorption onto PWB and CWB were assessed using the pseudo second-order and Elovich models, where both applied models could well describe the adsorption kinetics. Removal efficiencies of the heavy metals were increases by 1.2, 1.4, and 1.6 times, respectively, for Pb, Mn, and Cu, when PWB content of the leachate increased from 0.5 to 5 g L-1. Equilibrium adsorption capacity of the heavy metals onto BC in leachate system was evaluated using the Langmuir, non-linearized Freundlich, linearized Freundlich, and Temkin isotherms and found to have the following order for PWB: Non-linearized Freundlich > Temkin > Langmuir > Linearized Freundlich. The Langmuir and linearized Freundlich models could not adequately represent adsorption of the heavy metals onto BC, especially for CWB. The highest removal of 88% was obtained for Pb, while the greatest adsorption intensity was found to be 1.58 mg g-1 for Mn. Using the non-linearized Freundlich isotherm significantly reduced adsorption prediction error. The adsorption affinity of PWB for Pb, Mn, and Cu was greater than that of CWB in all treatments. Wood-derived BC is suggested to be used for the removal of heavy metals from landfill leachate as an economical adsorbent.

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“…At this time, little or no adsorption was observed as the adsorbent active sites had been taken up by vanadium ions establishing an equilibrium state. 2 Fig. 6 -Effect of pH on adsorption of vanadium(V) using Luffa cylindrica Fig.…”

Section: Characterisation Of Textile Wastewatermentioning

confidence: 99%

“…The hazard posed by these heavy metals is attributed to their tendencies to bio-accumulate in systems, and their non-biodegradability. 2,3 Vanadium(V), being a rare metal, occurs naturally in earth mineral formations, its average concentration in the Earth's crust is 150 mg dm −3 , and is very soluble in water, making it an active source of water pollution when not controlled during discharge of process effluents. Vanadium(V) ingested into human systems in amounts above safe limits causes several health issues, ranging from respiratory, cardiac, digestive, and nervous system problems to skin irritation problems.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Vanadium(V) From Textile Industry Effluent Using Luffa cylindrica Activated Carbon

et al. 2021

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This study investigated the utilisation of Luffa cylindrica activated carbon as a low-cost adsorbent in the removal of vanadium(V) from textile industry effluent in a batch adsorption experiment. The adsorption rate was studied for contact time, pH, and adsorbent dosage. The effect of pH on vanadium(V) removal was studied with 0.2 g/100 ml adsorbent dose, 10 min contact time, and textile effluent solution. The maximum removal efficiency was 99.90 % at pH 4, 97.43 % at 60 min of contact time, and 97.83 % at an adsorbent dosage of 1.0 g. The characterisation results from FTIR and SEM indicated that the adsorbents’ potential was fully exploited. In this study, the experimental findings were fitted using Langmuir and Freundlich isotherm models. Freundlich model gave a better fit of the experimental data. The kinetic data by the pseudo-second order kinetic model gave a better fit than the pseudo-first order kinetic model.

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Removal of heavy metals from aqueous solutions using Eucalyptus Camaldulensis: An alternate low cost adsorbent

Cited by 62 publications

References 30 publications

Adsorption of Lead(II), Manganese(II), and Copper(II) onto biochar in landfill leachate: implication of non-linear regression analysis

Adsorption of Lead(II), Manganese(II), and Copper(II) onto biochar in landfill leachate: implication of non-linear regression analysis

Adsorption of Lead, Manganese, and Copper onto biochar in landfill leachate: implication of non-linear regression analysis

Adsorption of Vanadium(V) From Textile Industry Effluent Using Luffa cylindrica Activated Carbon

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