Removal of Cr(Ⅵ) from tannery biochemical tail water by chitosan modified hydrothermal carbon
The hydrothermal carbon precursor(WBC) was prepared by hydrothermal carbon method and modified with chitosan to obtain the modified hydrothermal carbon(CWBC). The materials were characterized by SEM, FT-IR, and nano-particle size surface potential analyzer, and the adsorption characteristics and ads...
Saved in:
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | zho |
| Published: |
Editorial Office of Industrial Water Treatment
2024-10-01
|
| Series: | Gongye shui chuli |
| Subjects: | |
| Online Access: | https://www.iwt.cn/CN/10.19965/j.cnki.iwt.2023-1150 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850165268042481664 |
|---|---|
| author | WANG Sen WANG Ying ZHANG Yuanru LI Chen DONG Zhikui CHEN Wenhui SUN Fule JI Renjie |
| author_facet | WANG Sen WANG Ying ZHANG Yuanru LI Chen DONG Zhikui CHEN Wenhui SUN Fule JI Renjie |
| author_sort | WANG Sen |
| collection | DOAJ |
| description | The hydrothermal carbon precursor(WBC) was prepared by hydrothermal carbon method and modified with chitosan to obtain the modified hydrothermal carbon(CWBC). The materials were characterized by SEM, FT-IR, and nano-particle size surface potential analyzer, and the adsorption characteristics and adsorption mechanism of CWBC for Cr(Ⅵ) in wastewater were investigated. The results showed that CWBC had a rough surface and compact three-dimensional network structure, and there were functional groups such as C—N/N—H, C—H and C—O on the surface. Most of the pores in CWBC was mesoporous, while a small part was macroporous. It was a typical mixed structure, which enhanced its adsorption performance for Cr(Ⅵ). When the dosage of CWBC was 1.0 g/L, the solution pH was 3, the initial mass concentration of Cr(Ⅵ) was 10 mg/L, and the reaction temperature was 35 ℃, the adsorption capacity of Cr(Ⅵ) in simulated wastewater by CWBC was higher than 9.9 mg/g, and the removal rate of Cr(Ⅵ) was up to 99%. In addition, the removal rate of Cr(Ⅵ) in the biochemical tail water of actual tannery could also reach 73.33%. The regeneration results showed that the removal rate of Cr(Ⅵ) still reached more than 75% after 8 adsorption-desorption cycles, indicating that the composite material had good recycling performance. The adsorption process of Cr(Ⅵ) by CWBC conformed to the quasi-first-order kinetics and Langmuir model, which was a monolayer adsorption, and dominated by physical adsorption. The thermodynamic analysis results showed that the adsorption of Cr(Ⅵ) by CWBC was an active endothermic reaction. |
| format | Article |
| id | doaj-art-fbf02e2eaa2b4aee9551887869d3954a |
| institution | OA Journals |
| issn | 1005-829X |
| language | zho |
| publishDate | 2024-10-01 |
| publisher | Editorial Office of Industrial Water Treatment |
| record_format | Article |
| series | Gongye shui chuli |
| spelling | doaj-art-fbf02e2eaa2b4aee9551887869d3954a2025-08-20T02:21:47ZzhoEditorial Office of Industrial Water TreatmentGongye shui chuli1005-829X2024-10-01441012313210.19965/j.cnki.iwt.2023-11501005-829X（2024）10-0123-10Removal of Cr(Ⅵ) from tannery biochemical tail water by chitosan modified hydrothermal carbonWANG Sen0WANG Ying1ZHANG Yuanru2LI Chen3DONG Zhikui4CHEN Wenhui5SUN Fule6JI Renjie7College of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xi'an 710021, ChinaCollege of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xi'an 710021, ChinaXi'an Water Treatment Co., Ltd., Xi'an 710086, ChinaXi'an Water Treatment Co., Ltd., Xi'an 710086, ChinaXi'an Water Treatment Co., Ltd., Xi'an 710086, ChinaShaanxi Shaanxi Jiao Chemical Co., Ltd., Weinan 714000, ChinaXi'an Water Treatment Co., Ltd., Xi'an 710086, ChinaXi'an Water Treatment Co., Ltd., Xi'an 710086, ChinaThe hydrothermal carbon precursor(WBC) was prepared by hydrothermal carbon method and modified with chitosan to obtain the modified hydrothermal carbon(CWBC). The materials were characterized by SEM, FT-IR, and nano-particle size surface potential analyzer, and the adsorption characteristics and adsorption mechanism of CWBC for Cr(Ⅵ) in wastewater were investigated. The results showed that CWBC had a rough surface and compact three-dimensional network structure, and there were functional groups such as C—N/N—H, C—H and C—O on the surface. Most of the pores in CWBC was mesoporous, while a small part was macroporous. It was a typical mixed structure, which enhanced its adsorption performance for Cr(Ⅵ). When the dosage of CWBC was 1.0 g/L, the solution pH was 3, the initial mass concentration of Cr(Ⅵ) was 10 mg/L, and the reaction temperature was 35 ℃, the adsorption capacity of Cr(Ⅵ) in simulated wastewater by CWBC was higher than 9.9 mg/g, and the removal rate of Cr(Ⅵ) was up to 99%. In addition, the removal rate of Cr(Ⅵ) in the biochemical tail water of actual tannery could also reach 73.33%. The regeneration results showed that the removal rate of Cr(Ⅵ) still reached more than 75% after 8 adsorption-desorption cycles, indicating that the composite material had good recycling performance. The adsorption process of Cr(Ⅵ) by CWBC conformed to the quasi-first-order kinetics and Langmuir model, which was a monolayer adsorption, and dominated by physical adsorption. The thermodynamic analysis results showed that the adsorption of Cr(Ⅵ) by CWBC was an active endothermic reaction.https://www.iwt.cn/CN/10.19965/j.cnki.iwt.2023-1150residual sludgehydrothermal carbonchitosanadsorptiontannery biochemical tail watercr(ⅵ) |
| spellingShingle | WANG Sen WANG Ying ZHANG Yuanru LI Chen DONG Zhikui CHEN Wenhui SUN Fule JI Renjie Removal of Cr(Ⅵ) from tannery biochemical tail water by chitosan modified hydrothermal carbon Gongye shui chuli residual sludge hydrothermal carbon chitosan adsorption tannery biochemical tail water cr(ⅵ) |
| title | Removal of Cr(Ⅵ) from tannery biochemical tail water by chitosan modified hydrothermal carbon |
| title_full | Removal of Cr(Ⅵ) from tannery biochemical tail water by chitosan modified hydrothermal carbon |
| title_fullStr | Removal of Cr(Ⅵ) from tannery biochemical tail water by chitosan modified hydrothermal carbon |
| title_full_unstemmed | Removal of Cr(Ⅵ) from tannery biochemical tail water by chitosan modified hydrothermal carbon |
| title_short | Removal of Cr(Ⅵ) from tannery biochemical tail water by chitosan modified hydrothermal carbon |
| title_sort | removal of cr vi from tannery biochemical tail water by chitosan modified hydrothermal carbon |
| topic | residual sludge hydrothermal carbon chitosan adsorption tannery biochemical tail water cr(ⅵ) |
| url | https://www.iwt.cn/CN/10.19965/j.cnki.iwt.2023-1150 |
| work_keys_str_mv | AT wangsen removalofcrvifromtannerybiochemicaltailwaterbychitosanmodifiedhydrothermalcarbon AT wangying removalofcrvifromtannerybiochemicaltailwaterbychitosanmodifiedhydrothermalcarbon AT zhangyuanru removalofcrvifromtannerybiochemicaltailwaterbychitosanmodifiedhydrothermalcarbon AT lichen removalofcrvifromtannerybiochemicaltailwaterbychitosanmodifiedhydrothermalcarbon AT dongzhikui removalofcrvifromtannerybiochemicaltailwaterbychitosanmodifiedhydrothermalcarbon AT chenwenhui removalofcrvifromtannerybiochemicaltailwaterbychitosanmodifiedhydrothermalcarbon AT sunfule removalofcrvifromtannerybiochemicaltailwaterbychitosanmodifiedhydrothermalcarbon AT jirenjie removalofcrvifromtannerybiochemicaltailwaterbychitosanmodifiedhydrothermalcarbon |