Elaborating the mechanism of lead adsorption by biochar : Considering the impacts of water-washing and freeze-drying in preparing biochar
Copyright © 2023 Elsevier Ltd. All rights reserved..
This paper examined the impacts of different pretreatments on the characteristics of biochar and its adsorption behavior for Pb2+. Biochar with combined pretreatment of water-washing and freeze-drying (W-FD-PB) performed a maximum adsorption capacity for Pb2+ of 406.99 mg/g, higher than that of 266.02 mg/g on water-washing pretreated biochar (W-PB) and 188.21 mg/g on directly pyrolyzed biochar (PB). This is because the water-washing process partially removed the K and Na, resulting in the relatively enriched Ca and Mg on W-FD-PB. And the freeze-drying pretreatment broke the fiber structure of pomelo peel, favoring the development of a fluffy surface and large specific surface area during pyrolysis. Quantitative mechanism analysis implied that cation ion exchange and precipitation were the driving forces in Pb2+ adsorption on biochar, and both mechanisms were enhanced during Pb2+ adsorption on W-FD-PB. Furthermore, adding W-FD-PB to Pb-contaminated soil increased the soil pH and significantly reduced the availability of Pb.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2023 |
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| Erschienen: |
2023 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:386 |
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| Enthalten in: |
Bioresource technology - 386(2023) vom: 01. Okt., Seite 129447 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Liu, Yihuan [VerfasserIn] |
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| Links: |
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| Themen: |
059QF0KO0R |
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| Anmerkungen: |
Date Completed 14.08.2023 Date Revised 14.08.2023 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1016/j.biortech.2023.129447 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM359011578 |
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| 100 | 1 | |a Liu, Yihuan |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Elaborating the mechanism of lead adsorption by biochar |b Considering the impacts of water-washing and freeze-drying in preparing biochar |
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| 500 | |a Date Revised 14.08.2023 | ||
| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a Copyright © 2023 Elsevier Ltd. All rights reserved. | ||
| 520 | |a This paper examined the impacts of different pretreatments on the characteristics of biochar and its adsorption behavior for Pb2+. Biochar with combined pretreatment of water-washing and freeze-drying (W-FD-PB) performed a maximum adsorption capacity for Pb2+ of 406.99 mg/g, higher than that of 266.02 mg/g on water-washing pretreated biochar (W-PB) and 188.21 mg/g on directly pyrolyzed biochar (PB). This is because the water-washing process partially removed the K and Na, resulting in the relatively enriched Ca and Mg on W-FD-PB. And the freeze-drying pretreatment broke the fiber structure of pomelo peel, favoring the development of a fluffy surface and large specific surface area during pyrolysis. Quantitative mechanism analysis implied that cation ion exchange and precipitation were the driving forces in Pb2+ adsorption on biochar, and both mechanisms were enhanced during Pb2+ adsorption on W-FD-PB. Furthermore, adding W-FD-PB to Pb-contaminated soil increased the soil pH and significantly reduced the availability of Pb | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Biochar | |
| 650 | 4 | |a Combined pretreatment | |
| 650 | 4 | |a Pb immobilization | |
| 650 | 4 | |a Soil remediation | |
| 650 | 7 | |a biochar |2 NLM | |
| 650 | 7 | |a Water |2 NLM | |
| 650 | 7 | |a 059QF0KO0R |2 NLM | |
| 650 | 7 | |a Lead |2 NLM | |
| 650 | 7 | |a 2P299V784P |2 NLM | |
| 650 | 7 | |a Soil Pollutants |2 NLM | |
| 650 | 7 | |a Charcoal |2 NLM | |
| 650 | 7 | |a 16291-96-6 |2 NLM | |
| 650 | 7 | |a Soil |2 NLM | |
| 700 | 1 | |a Chen, Yaoning |e verfasserin |4 aut | |
| 700 | 1 | |a Li, Yuanping |e verfasserin |4 aut | |
| 700 | 1 | |a Chen, Li |e verfasserin |4 aut | |
| 700 | 1 | |a Jiang, Hongjuan |e verfasserin |4 aut | |
| 700 | 1 | |a Jiang, Longbo |e verfasserin |4 aut | |
| 700 | 1 | |a Yan, Haoqin |e verfasserin |4 aut | |
| 700 | 1 | |a Zhao, Mengyang |e verfasserin |4 aut | |
| 700 | 1 | |a Hou, Suzhen |e verfasserin |4 aut | |
| 700 | 1 | |a Zhao, Chen |e verfasserin |4 aut | |
| 700 | 1 | |a Chen, Yanrong |e verfasserin |4 aut | |
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