Study of adsorption property and mechanism of lead(II) and cadmium(II) onto sulfhydryl modified attapulgite
Study of the adsorption property and mechanism about the environmental functional material can provide theoretical guidance for its actual application. The sulfhydryl attapulgite (SH-ATP) was prepared by solution blending method. The saturated adsorption capacity to Pb2+ and Cd2+ in the experiment w...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-02-01
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| Series: | Arabian Journal of Chemistry |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1878535220305219 |
| _version_ | 1818418585723207680 |
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| author | Cheng Fu Xiaping Zhu Xun Dong Ping Zhao Zepeng Wang |
| author_facet | Cheng Fu Xiaping Zhu Xun Dong Ping Zhao Zepeng Wang |
| author_sort | Cheng Fu |
| collection | DOAJ |
| description | Study of the adsorption property and mechanism about the environmental functional material can provide theoretical guidance for its actual application. The sulfhydryl attapulgite (SH-ATP) was prepared by solution blending method. The saturated adsorption capacity to Pb2+ and Cd2+ in the experiment were 65.57 and 22.71 mg/g, which increased by 57.74% and 31.96% comparing with the attapulgite (ATP), respectively. The adsorption kinetics experiments illustrated that the adsorption of Pb2+ and Cd2+ onto SH-ATP accorded with multiple kinetic models. Among them, the pseudo second-order model had the best correlation, the correlation coefficients were all above 0.998. The adsorption thermodynamics experiments testified that the adsorption of Pb2+ and Cd2+ onto SH-ATP conformed to the Langmuir, Tempkin and Dubinin-Radushkevich models, those models indicated that the adsorption processes belonged to the monolayer adsorption, the adsorbent surface was homogeneous, and the micropore distribution of the adsorbent was also relatively uniform. Various thermodynamic parameters (ΔH > 0, ΔS > 0, ΔG < 0) under 25-45℃ indicated that the adsorption processes of Pb2+ and Cd2+ onto SH-ATP were endothermic and spontaneous. |
| first_indexed | 2024-12-14T12:25:01Z |
| format | Article |
| id | doaj.art-3381cf22ad314dfe8871b893a265de51 |
| institution | Directory Open Access Journal |
| issn | 1878-5352 |
| language | English |
| last_indexed | 2024-12-14T12:25:01Z |
| publishDate | 2021-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Arabian Journal of Chemistry |
| spelling | doaj.art-3381cf22ad314dfe8871b893a265de512022-12-21T23:01:21ZengElsevierArabian Journal of Chemistry1878-53522021-02-01142102960Study of adsorption property and mechanism of lead(II) and cadmium(II) onto sulfhydryl modified attapulgiteCheng Fu0Xiaping Zhu1Xun Dong2Ping Zhao3Zepeng Wang4College of Materials and Chemistry and Chemical Engineering, Chengdu University of Technology, Chengdu 610059, ChinaCollege of Materials and Chemistry and Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China; Corresponding author at: Erxianqiao Dongsan Road 1#, Chengdu, China.College of Materials and Chemistry and Chemical Engineering, Chengdu University of Technology, Chengdu 610059, ChinaGeological Party 105, Guizhou Provincial Bureau of Geology and Mineral Exploration and Development, Guiyang 550018, ChinaGeological Party 105, Guizhou Provincial Bureau of Geology and Mineral Exploration and Development, Guiyang 550018, ChinaStudy of the adsorption property and mechanism about the environmental functional material can provide theoretical guidance for its actual application. The sulfhydryl attapulgite (SH-ATP) was prepared by solution blending method. The saturated adsorption capacity to Pb2+ and Cd2+ in the experiment were 65.57 and 22.71 mg/g, which increased by 57.74% and 31.96% comparing with the attapulgite (ATP), respectively. The adsorption kinetics experiments illustrated that the adsorption of Pb2+ and Cd2+ onto SH-ATP accorded with multiple kinetic models. Among them, the pseudo second-order model had the best correlation, the correlation coefficients were all above 0.998. The adsorption thermodynamics experiments testified that the adsorption of Pb2+ and Cd2+ onto SH-ATP conformed to the Langmuir, Tempkin and Dubinin-Radushkevich models, those models indicated that the adsorption processes belonged to the monolayer adsorption, the adsorbent surface was homogeneous, and the micropore distribution of the adsorbent was also relatively uniform. Various thermodynamic parameters (ΔH > 0, ΔS > 0, ΔG < 0) under 25-45℃ indicated that the adsorption processes of Pb2+ and Cd2+ onto SH-ATP were endothermic and spontaneous.http://www.sciencedirect.com/science/article/pii/S1878535220305219Sulfhydryl modified attapulgiteLead and cadmiumAdsorption propertiesAdsorption mechanism |
| spellingShingle | Cheng Fu Xiaping Zhu Xun Dong Ping Zhao Zepeng Wang Study of adsorption property and mechanism of lead(II) and cadmium(II) onto sulfhydryl modified attapulgite Arabian Journal of Chemistry Sulfhydryl modified attapulgite Lead and cadmium Adsorption properties Adsorption mechanism |
| title | Study of adsorption property and mechanism of lead(II) and cadmium(II) onto sulfhydryl modified attapulgite |
| title_full | Study of adsorption property and mechanism of lead(II) and cadmium(II) onto sulfhydryl modified attapulgite |
| title_fullStr | Study of adsorption property and mechanism of lead(II) and cadmium(II) onto sulfhydryl modified attapulgite |
| title_full_unstemmed | Study of adsorption property and mechanism of lead(II) and cadmium(II) onto sulfhydryl modified attapulgite |
| title_short | Study of adsorption property and mechanism of lead(II) and cadmium(II) onto sulfhydryl modified attapulgite |
| title_sort | study of adsorption property and mechanism of lead ii and cadmium ii onto sulfhydryl modified attapulgite |
| topic | Sulfhydryl modified attapulgite Lead and cadmium Adsorption properties Adsorption mechanism |
| url | http://www.sciencedirect.com/science/article/pii/S1878535220305219 |
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