Functionalization of pine sawdust biochars with Mg/Al layered double hydroxides to enhance adsorption capacity of synthetic azo dyes: Adsorption mechanisms and reusability
This study determined that the adsorption of azo dyes, Methyl Orange (MO) and Sunset Yellow FCF (SYF), using the pristine pine sawdust biochar (PSB) and post-modified PSB with Mg/Al layered double hydroxides (PSB-LDHMgAl) was examined to offer valuable information into the differences in their adsor...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-03-01
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| Series: | Heliyon |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S240584402301349X |
| _version_ | 1797851854239956992 |
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| author | Jonggu Kim Guen-Hyeok Bak Da-Young Yoo Young-In Lee Yong-Gu Lee Kangmin Chon |
| author_facet | Jonggu Kim Guen-Hyeok Bak Da-Young Yoo Young-In Lee Yong-Gu Lee Kangmin Chon |
| author_sort | Jonggu Kim |
| collection | DOAJ |
| description | This study determined that the adsorption of azo dyes, Methyl Orange (MO) and Sunset Yellow FCF (SYF), using the pristine pine sawdust biochar (PSB) and post-modified PSB with Mg/Al layered double hydroxides (PSB-LDHMgAl) was examined to offer valuable information into the differences in their adsorption mechanisms. Although a lower specific surface area of PSB-LDHMgAl (147.2 m2 g−1) than PSB (495.7 m2 g−1), LDHMgAl were successfully functionalized on the PSB surface through co-precipitation, which was highly related to the improvements of adsorption capacity of PSB-LDHMgAl toward MO and SYF. The MO and SYF adsorption kinetics by PSB and PSB-LDHMgAl were confirmed to the pseudo-second-order and considered chemisorption. The adsorption capacity of MO and SYF adsorbed onto PSB-LDHMgAl (MO = 21.8 mg g−1, SYF = 23.6 mg g−1) were significantly higher than that of PSB (MO = 2.2 mg g−1, SYF = 1.6 mg g−1). The adsorption isotherms of MO and SYF by PSB were well fitted by Freundlich isotherm, whereas the MO and SYF via PSB-LDHMgAl were by Langmuir isotherm. Even after 3 adsorption-desorption cycles using desorbents, the PSB-LDHMgAl remained excellent reusability (reuse efficiency: >81.2%). These findings suggest that post-modification with LDHMgAl might accelerate the adsorption performance (i.e., electrostatic interaction) of azo dyes to PSB in water. |
| first_indexed | 2024-04-09T19:24:32Z |
| format | Article |
| id | doaj.art-71e5be1b5a394cb49e56bbf5be4f8dec |
| institution | Directory Open Access Journal |
| issn | 2405-8440 |
| language | English |
| last_indexed | 2024-04-09T19:24:32Z |
| publishDate | 2023-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Heliyon |
| spelling | doaj.art-71e5be1b5a394cb49e56bbf5be4f8dec2023-04-05T08:20:59ZengElsevierHeliyon2405-84402023-03-0193e14142Functionalization of pine sawdust biochars with Mg/Al layered double hydroxides to enhance adsorption capacity of synthetic azo dyes: Adsorption mechanisms and reusabilityJonggu Kim0Guen-Hyeok Bak1Da-Young Yoo2Young-In Lee3Yong-Gu Lee4Kangmin Chon5Department of Integrated Energy and Infra System, Kangwon National University, Kangwondaehak-gil, 1, Chuncheon-si, Gangwon-do, 24341, Republic of Korea; Department of Environmental Engineering, College of Engineering, Kangwon National University, Kangwondaehak-gil, 1, Chuncheon-si, Gangwon-do, 24341, Republic of KoreaDepartment of Environmental Engineering, College of Engineering, Kangwon National University, Kangwondaehak-gil, 1, Chuncheon-si, Gangwon-do, 24341, Republic of KoreaDepartment of Environmental Engineering, College of Engineering, Kangwon National University, Kangwondaehak-gil, 1, Chuncheon-si, Gangwon-do, 24341, Republic of KoreaDepartment of Environmental Engineering, College of Engineering, Kangwon National University, Kangwondaehak-gil, 1, Chuncheon-si, Gangwon-do, 24341, Republic of KoreaDepartment of Environmental Engineering, College of Engineering, Kangwon National University, Kangwondaehak-gil, 1, Chuncheon-si, Gangwon-do, 24341, Republic of Korea; Corresponding author.Department of Integrated Energy and Infra System, Kangwon National University, Kangwondaehak-gil, 1, Chuncheon-si, Gangwon-do, 24341, Republic of Korea; Department of Environmental Engineering, College of Engineering, Kangwon National University, Kangwondaehak-gil, 1, Chuncheon-si, Gangwon-do, 24341, Republic of Korea; Corresponding author.Department of Integrated Energy and Infra System, Kangwon National University, Kangwondaehak-gil, 1, Chuncheon-si, Gangwon-do, 24341, Republic of Korea.This study determined that the adsorption of azo dyes, Methyl Orange (MO) and Sunset Yellow FCF (SYF), using the pristine pine sawdust biochar (PSB) and post-modified PSB with Mg/Al layered double hydroxides (PSB-LDHMgAl) was examined to offer valuable information into the differences in their adsorption mechanisms. Although a lower specific surface area of PSB-LDHMgAl (147.2 m2 g−1) than PSB (495.7 m2 g−1), LDHMgAl were successfully functionalized on the PSB surface through co-precipitation, which was highly related to the improvements of adsorption capacity of PSB-LDHMgAl toward MO and SYF. The MO and SYF adsorption kinetics by PSB and PSB-LDHMgAl were confirmed to the pseudo-second-order and considered chemisorption. The adsorption capacity of MO and SYF adsorbed onto PSB-LDHMgAl (MO = 21.8 mg g−1, SYF = 23.6 mg g−1) were significantly higher than that of PSB (MO = 2.2 mg g−1, SYF = 1.6 mg g−1). The adsorption isotherms of MO and SYF by PSB were well fitted by Freundlich isotherm, whereas the MO and SYF via PSB-LDHMgAl were by Langmuir isotherm. Even after 3 adsorption-desorption cycles using desorbents, the PSB-LDHMgAl remained excellent reusability (reuse efficiency: >81.2%). These findings suggest that post-modification with LDHMgAl might accelerate the adsorption performance (i.e., electrostatic interaction) of azo dyes to PSB in water.http://www.sciencedirect.com/science/article/pii/S240584402301349XAdsorptionAzo dyesCo-precipitationMgAl Layered double hydroxidesPine sawdusts biochars |
| spellingShingle | Jonggu Kim Guen-Hyeok Bak Da-Young Yoo Young-In Lee Yong-Gu Lee Kangmin Chon Functionalization of pine sawdust biochars with Mg/Al layered double hydroxides to enhance adsorption capacity of synthetic azo dyes: Adsorption mechanisms and reusability Heliyon Adsorption Azo dyes Co-precipitation MgAl Layered double hydroxides Pine sawdusts biochars |
| title | Functionalization of pine sawdust biochars with Mg/Al layered double hydroxides to enhance adsorption capacity of synthetic azo dyes: Adsorption mechanisms and reusability |
| title_full | Functionalization of pine sawdust biochars with Mg/Al layered double hydroxides to enhance adsorption capacity of synthetic azo dyes: Adsorption mechanisms and reusability |
| title_fullStr | Functionalization of pine sawdust biochars with Mg/Al layered double hydroxides to enhance adsorption capacity of synthetic azo dyes: Adsorption mechanisms and reusability |
| title_full_unstemmed | Functionalization of pine sawdust biochars with Mg/Al layered double hydroxides to enhance adsorption capacity of synthetic azo dyes: Adsorption mechanisms and reusability |
| title_short | Functionalization of pine sawdust biochars with Mg/Al layered double hydroxides to enhance adsorption capacity of synthetic azo dyes: Adsorption mechanisms and reusability |
| title_sort | functionalization of pine sawdust biochars with mg al layered double hydroxides to enhance adsorption capacity of synthetic azo dyes adsorption mechanisms and reusability |
| topic | Adsorption Azo dyes Co-precipitation MgAl Layered double hydroxides Pine sawdusts biochars |
| url | http://www.sciencedirect.com/science/article/pii/S240584402301349X |
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