Effect of coal fly ash's particle size on U adsorption in water samples and thermodynamic study on adsorption

Maity, Sukanta; Chaudhary, Dilip Kumar; Dusane, Chetan Kumar; Sahu, S. K.; Kumar, Amar

doi:10.1016/j.enceco.2020.01.005

Cited by 8 publications

(4 citation statements)

References 34 publications

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“…This is due to the presence of larger specific surface area and the number of active centers capable of adsorbing metal ions [ 23 ]. Hence, following the literature analyses and research results, it can be concluded that it is appropriate to use SS-FA particles with the smallest particle size range to carry out Ni(II) adsorption experiments [ 24 , 25 , 26 , 27 ].…”

Section: Resultsmentioning

confidence: 99%

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Highly Effective Adsorption Process of Ni(II) Ions with the Use of Sewage Sludge Fly Ash Generated by Circulating Fluidized Bed Combustion (CFBC) Technology

2021

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Recently, more and more attention has been paid to the removal of nickel ions due to their negative effects on the environment and human health. In this research, fly ash obtained as a result of incineration of municipal sewage sludge with the use of circulating fluidized bed combustion (CFBC) technology was used to analyze the possibility of removing Ni(II) ions in adsorption processes. The properties of the material were determined using analytical methods, such as SEM-EDS, XRD, BET, BJH, thermogravimetry, zeta potential, SEM, and FT-IR. Several factors were analyzed, such as adsorbent dose, initial pH, initial concentration, and contact time. As a result of the conducted research, the maximum sorption efficiency was obtained at the level of 99.9%. The kinetics analysis and isotherms showed that the pseudo-second order equation model and the Freundlich isotherm model best suited this process. In conclusion, sewage sludge fly ash may be a suitable material for the effective removal of nickel from wastewater and the improvement of water quality. This research is in line with current trends in the concepts of circular economy and sustainable development.

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Section: Resultsmentioning

confidence: 99%

“…According to the literature, smaller particles have the ability to dissolve or suspend in solutions more quickly and form a more stable suspension compared to larger ones. Additionally, smaller particles obtain higher adsorption in metal ion binding processes [ 24 , 35 ].…”

Section: Resultsmentioning

confidence: 99%

Highly Effective Adsorption Process of Ni(II) Ions with the Use of Sewage Sludge Fly Ash Generated by Circulating Fluidized Bed Combustion (CFBC) Technology

2021

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“…According to the literature, the effectiveness of removing lead and copper ions increased with the decrease in the size of FA particles, which led to an increase in the particle surface and the number of active centers on the adsorbent having an affinity for metal ions [29,40]. Hence, literature data and research results suggested that FA with smaller particle size might be used in these studies [41][42][43][44][45][46].…”

Section: Characterization Of the Adsorbentmentioning

confidence: 99%

“…The smaller particles are able to dissolve more quickly in solution and form a more stable suspension compared to the larger ones. Moreover, smaller adsorbent particles achieve a higher efficiency in adsorption processes [41,51,52].…”

Section: Characterization Of the Adsorbentmentioning

confidence: 99%

High Efficiency of the Removal Process of Pb(II) and Cu(II) Ions with the Use of Fly Ash from Incineration of Sunflower and Wood Waste Using the CFBC Technology

2021

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In these research studies, fly ash (SW-FA) resulting from the incineration of sunflower (20%) and wood (80%) waste employing the circulating fluidized bed combustion (CFBC) technology was used to analyze the possibility of removing Pb(II) and Cu(II) ions in adsorption processes. Currently, great emphasis is placed on circular economy, zero waste or climate neutrality strategies. The use of low-cost SW-FA waste seems to fit well with pro-ecological, economic and energy-saving trends. Hence, this material was characterized by various techniques, such as granulation analysis, bulk density, SEM-EDX, XRD and XRF analysis, BET, BJH, thermogravimetry, zeta potential, SEM morphology and FT-IR spectrometry. As a result of the conducted research, the factors influencing the effectiveness of the adsorption process, such as adsorbent dosage, initial and equilibrium pH, initial metal concentration and contact time, were analyzed. The maximum removal efficiency were achieved at the level of 99.8% for Pb(II) and 99.6% for Cu(II), respectively. The kinetics analysis and isotherms showed that the pseudo-second-order equation and the Freundlich isotherm models better describe these processes. The experiments proved that SW-FA can act as an appropriate adsorbent for highly effective removal of lead and copper from wastewater and improvement of water quality.

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Highly reusable bentonite clay@biochar@Fe3O4 nanocomposite for Hg(II) removal from synthetic and real wastewater

Alali

Almojil

Almohana

et al. 2023

Environ Sci Pollut Res

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The present research investigates the performance of bentonite clay@biochar@magnetic nanocomposite in removing mercury (Hg 2+ ) ions from aqueous media. Bentonite clay@biochar@magnetic nanocomposite was characterized by BET, VSM, TEM, Mapping, EDX, SEM, FT-IR, XRD and Raman analyses. According to the results, the highest uptake e ciency of Hg 2+ was attained at pH 6, Hg 2+ concentration of 10 ppm, 80 min, and composite dose of 1.5 g/L. In these conditions, the uptake e ciency of bentonite@activated carbon@Fe 3 O 4 nanocomposite and bentonite were 98.78% and 97.67%, respectively, which are remarkable values. Also, the W max value for Hg 2+ removal using bentonite@biochar@magnetic nanocomposite and bentonite were 66.66 and 60.98 mg/g, respectively.Moreover, the uptake process of Hg 2+ ions using bentonite@biochar@magnetic nanocomposite and bentonite was spontaneous, physical, favorable and exothermic. Besides, the impact of various divalent ions such as Co 2+ , Cu 2+ , Pb 2+ , Ni 2+ , and Zn 2+ was studied on the elimination e ciency of Hg 2+ using bentonite and bentonite clay@biochar@magnetic sorbents. The results showed that Co 2+ and Zn 2+ ions have the highest and lowest interfering effects in the removal of Hg 2+ . Also, the reusability of adsorbents showed that they have high stability and can be used in at least 5 reuse cycles with high uptake e ciency. Additionally,

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Effect of coal fly ash's particle size on U adsorption in water samples and thermodynamic study on adsorption

Cited by 8 publications

References 34 publications

Highly Effective Adsorption Process of Ni(II) Ions with the Use of Sewage Sludge Fly Ash Generated by Circulating Fluidized Bed Combustion (CFBC) Technology

Highly Effective Adsorption Process of Ni(II) Ions with the Use of Sewage Sludge Fly Ash Generated by Circulating Fluidized Bed Combustion (CFBC) Technology

High Efficiency of the Removal Process of Pb(II) and Cu(II) Ions with the Use of Fly Ash from Incineration of Sunflower and Wood Waste Using the CFBC Technology

Highly reusable bentonite clay@biochar@Fe3O4 nanocomposite for Hg(II) removal from synthetic and real wastewater

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