Adsorption of Pb(II) from wastewater using a red mud modified rice-straw biochar : Influencing factors and reusability
Copyright © 2023 Elsevier Ltd. All rights reserved..
Efficient environmental remediation of toxic chemicals using effective sorbents has received considerable attention recently. For the present study, the synthesis of a red mud/biochar (RM/BC) composite was performed from rice straw with the aim of achieving Pb(II) removal from wastewater. Characterization was performed by using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), energy dispersive spectroscopy (EDS), Zeta potential analysis, elemental mapping, scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Results showed that RM/BC had higher specific surface area (SBET = 75.37 m2 g-1) than raw biochar (SBET = 35.38 m2 g-1). The Pb(II) removal capacity (qe) of RM/BC was 426.84 mg g-1 at pH 5.0, and the adsorption data well fitted pseudo second order kinetics (R2 = 0.93 and R2 = 0.98), as well as the Langmuir isotherm model (R2 = 0.97 and R2 = 0.98) for both BC and RM/BC. Pb(II) removal was slightly hindered with the increasing strength of co-existing cations (Na+, Cu2+, Fe3+, Ni2+, Cd2+). The increase in temperatures (298 K, 308 K, 318 K) favored Pb(II) removal by RM/BC. Thermodynamic study indicated that Pb(II) adsorption onto BC and RM/BC was spontaneous and primarily governed by chemisorption and surface complexation. A regeneration study revealed the high reusability (>90%) and acceptable stability of RM/BC even after five successive cycles. These findings indicate that RM/BC evidenced special combined characteristics of red mud and biochar, hence its use for Pb removal from wastewater offers a green and environmentally sustainable approach fitting the "waste treating waste" concept.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2023 |
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| Erschienen: |
2023 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:326 |
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| Enthalten in: |
Environmental pollution (Barking, Essex : 1987) - 326(2023) vom: 01. Juni, Seite 121405 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Ahmed, Waqas [VerfasserIn] |
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| Links: |
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| Anmerkungen: |
Date Completed 18.04.2023 Date Revised 18.04.2023 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1016/j.envpol.2023.121405 |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM353996742 |
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| 100 | 1 | |a Ahmed, Waqas |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Adsorption of Pb(II) from wastewater using a red mud modified rice-straw biochar |b Influencing factors and reusability |
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| 520 | |a Copyright © 2023 Elsevier Ltd. All rights reserved. | ||
| 520 | |a Efficient environmental remediation of toxic chemicals using effective sorbents has received considerable attention recently. For the present study, the synthesis of a red mud/biochar (RM/BC) composite was performed from rice straw with the aim of achieving Pb(II) removal from wastewater. Characterization was performed by using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), energy dispersive spectroscopy (EDS), Zeta potential analysis, elemental mapping, scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Results showed that RM/BC had higher specific surface area (SBET = 75.37 m2 g-1) than raw biochar (SBET = 35.38 m2 g-1). The Pb(II) removal capacity (qe) of RM/BC was 426.84 mg g-1 at pH 5.0, and the adsorption data well fitted pseudo second order kinetics (R2 = 0.93 and R2 = 0.98), as well as the Langmuir isotherm model (R2 = 0.97 and R2 = 0.98) for both BC and RM/BC. Pb(II) removal was slightly hindered with the increasing strength of co-existing cations (Na+, Cu2+, Fe3+, Ni2+, Cd2+). The increase in temperatures (298 K, 308 K, 318 K) favored Pb(II) removal by RM/BC. Thermodynamic study indicated that Pb(II) adsorption onto BC and RM/BC was spontaneous and primarily governed by chemisorption and surface complexation. A regeneration study revealed the high reusability (>90%) and acceptable stability of RM/BC even after five successive cycles. These findings indicate that RM/BC evidenced special combined characteristics of red mud and biochar, hence its use for Pb removal from wastewater offers a green and environmentally sustainable approach fitting the "waste treating waste" concept | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Adsorption | |
| 650 | 4 | |a Engineered biochar | |
| 650 | 4 | |a Environmental remediation | |
| 650 | 4 | |a Removal mechanisms | |
| 650 | 4 | |a Toxic chemicals | |
| 650 | 4 | |a Wastewater treatment | |
| 650 | 7 | |a Wastewater |2 NLM | |
| 650 | 7 | |a biochar |2 NLM | |
| 650 | 7 | |a Lead |2 NLM | |
| 650 | 7 | |a 2P299V784P |2 NLM | |
| 650 | 7 | |a Charcoal |2 NLM | |
| 650 | 7 | |a 16291-96-6 |2 NLM | |
| 650 | 7 | |a Water Pollutants, Chemical |2 NLM | |
| 700 | 1 | |a Mehmood, Sajid |e verfasserin |4 aut | |
| 700 | 1 | |a Mahmood, Mohsin |e verfasserin |4 aut | |
| 700 | 1 | |a Ali, Sehrish |e verfasserin |4 aut | |
| 700 | 1 | |a Shakoor, Awais |e verfasserin |4 aut | |
| 700 | 1 | |a Núñez-Delgado, Avelino |e verfasserin |4 aut | |
| 700 | 1 | |a Asghar, Rana Muhammad Ammar |e verfasserin |4 aut | |
| 700 | 1 | |a Zhao, Hongwei |e verfasserin |4 aut | |
| 700 | 1 | |a Liu, Wenjie |e verfasserin |4 aut | |
| 700 | 1 | |a Li, Weidong |e verfasserin |4 aut | |
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