Adsorption mechanism of Cd(II) by calcium-modified lignite-derived humin in aqueous solutions
Abstract Lignite-derived humin (CHM) was extracted from raw coal in Heihe City, China, producing calcium-modified lignite-derived humin (Ca-CHM) by Ca(OH)2. The physical and chemical performances of CHM and Ca-CHM were analyzed with SEM, 13C spectra and XPS techniques. The results show that Ca-CHM e...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2022-05-01
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| Series: | International Journal of Coal Science & Technology |
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| Online Access: | https://doi.org/10.1007/s40789-022-00492-2 |
| _version_ | 1828796398188888064 |
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| author | Ping Wang Zhanbin Huang Zhanyong Fu Peng Zhao Zeshen Feng Yao Wang Fangze Li |
| author_facet | Ping Wang Zhanbin Huang Zhanyong Fu Peng Zhao Zeshen Feng Yao Wang Fangze Li |
| author_sort | Ping Wang |
| collection | DOAJ |
| description | Abstract Lignite-derived humin (CHM) was extracted from raw coal in Heihe City, China, producing calcium-modified lignite-derived humin (Ca-CHM) by Ca(OH)2. The physical and chemical performances of CHM and Ca-CHM were analyzed with SEM, 13C spectra and XPS techniques. The results show that Ca-CHM exhibited weaker aliphatic, more aromatic polar compared with CHM, which improves the adsorption capacity for Cd(II). XPS analysis indicates that Ca(II) has been loaded onto Ca-CHM successfully after modification. This batch adsorption experiments report the adsorption performance of CHM and Ca-CHM for Cd(II). The adsorption process of CHM and Ca-CHM for Cd(II) conform to pseudo-second-order model, which is chemical adsorption, and the adsorption data presented good fits to the Langmuir model. The maximum adsorption amount (Q m) of Cd(II) onto CHM and Ca-CHM by the Langmuir model is 15.29 mg/g and 41.84 mg/g, respectively. Based on the results of SEM, 13C spectra, and XPS analysis, we concluded that the main adsorption mechanism of Ca-CHM on Cd(II) was ion exchange of Cd(II) for Ca(II), static-adsorbed and surface complexation. Therefore, Ca(II) can be loaded on the surface of Ca-CHM by chemical modification, improving the adsorption capacity of materials in aqueous solutions. Graphical abstract |
| first_indexed | 2024-12-12T04:22:11Z |
| format | Article |
| id | doaj.art-2610ae35fb5a45289aef03505e48bd03 |
| institution | Directory Open Access Journal |
| issn | 2095-8293 2198-7823 |
| language | English |
| last_indexed | 2024-12-12T04:22:11Z |
| publishDate | 2022-05-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | International Journal of Coal Science & Technology |
| spelling | doaj.art-2610ae35fb5a45289aef03505e48bd032022-12-22T00:38:18ZengSpringerOpenInternational Journal of Coal Science & Technology2095-82932198-78232022-05-019111110.1007/s40789-022-00492-2Adsorption mechanism of Cd(II) by calcium-modified lignite-derived humin in aqueous solutionsPing Wang0Zhanbin Huang1Zhanyong Fu2Peng Zhao3Zeshen Feng4Yao Wang5Fangze Li6School of Chemical and Environmental Engineering, China University of Mining and Technology-BeijingSchool of Chemical and Environmental Engineering, China University of Mining and Technology-BeijingSchool of Chemical and Environmental Engineering, China University of Mining and Technology-BeijingSchool of Chemical and Environmental Engineering, China University of Mining and Technology-BeijingSchool of Chemical and Environmental Engineering, China University of Mining and Technology-BeijingSchool of Chemical and Environmental Engineering, China University of Mining and Technology-BeijingSchool of Chemical and Environmental Engineering, China University of Mining and Technology-BeijingAbstract Lignite-derived humin (CHM) was extracted from raw coal in Heihe City, China, producing calcium-modified lignite-derived humin (Ca-CHM) by Ca(OH)2. The physical and chemical performances of CHM and Ca-CHM were analyzed with SEM, 13C spectra and XPS techniques. The results show that Ca-CHM exhibited weaker aliphatic, more aromatic polar compared with CHM, which improves the adsorption capacity for Cd(II). XPS analysis indicates that Ca(II) has been loaded onto Ca-CHM successfully after modification. This batch adsorption experiments report the adsorption performance of CHM and Ca-CHM for Cd(II). The adsorption process of CHM and Ca-CHM for Cd(II) conform to pseudo-second-order model, which is chemical adsorption, and the adsorption data presented good fits to the Langmuir model. The maximum adsorption amount (Q m) of Cd(II) onto CHM and Ca-CHM by the Langmuir model is 15.29 mg/g and 41.84 mg/g, respectively. Based on the results of SEM, 13C spectra, and XPS analysis, we concluded that the main adsorption mechanism of Ca-CHM on Cd(II) was ion exchange of Cd(II) for Ca(II), static-adsorbed and surface complexation. Therefore, Ca(II) can be loaded on the surface of Ca-CHM by chemical modification, improving the adsorption capacity of materials in aqueous solutions. Graphical abstracthttps://doi.org/10.1007/s40789-022-00492-2Lignite-derived huminModificationCd(II)AdsorptionMechanism |
| spellingShingle | Ping Wang Zhanbin Huang Zhanyong Fu Peng Zhao Zeshen Feng Yao Wang Fangze Li Adsorption mechanism of Cd(II) by calcium-modified lignite-derived humin in aqueous solutions International Journal of Coal Science & Technology Lignite-derived humin Modification Cd(II) Adsorption Mechanism |
| title | Adsorption mechanism of Cd(II) by calcium-modified lignite-derived humin in aqueous solutions |
| title_full | Adsorption mechanism of Cd(II) by calcium-modified lignite-derived humin in aqueous solutions |
| title_fullStr | Adsorption mechanism of Cd(II) by calcium-modified lignite-derived humin in aqueous solutions |
| title_full_unstemmed | Adsorption mechanism of Cd(II) by calcium-modified lignite-derived humin in aqueous solutions |
| title_short | Adsorption mechanism of Cd(II) by calcium-modified lignite-derived humin in aqueous solutions |
| title_sort | adsorption mechanism of cd ii by calcium modified lignite derived humin in aqueous solutions |
| topic | Lignite-derived humin Modification Cd(II) Adsorption Mechanism |
| url | https://doi.org/10.1007/s40789-022-00492-2 |
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