Adsorption of pyridine from aqueous solutions onto polyaluminium chloride and anionic polyacrylamide water treatment residuals
The adsorption performance of pyridine onto polyaluminium chloride (PAC) and anionic polyacrylamide (APAM) water treatment residuals (WTRs) was investigated by batch experiments. This study confirmed the assumption that PAC–APAM WTRs had the ability to remove pyridine. The non-linear Dubinin–Radushk...
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| Format: | Article |
| Language: | English |
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IWA Publishing
2021-04-01
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| Series: | Water Science and Technology |
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| Online Access: | http://wst.iwaponline.com/content/83/7/1753 |
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| author | Runbin Duan Clifford B. Fedler Xiaofei Jiao |
| author_facet | Runbin Duan Clifford B. Fedler Xiaofei Jiao |
| author_sort | Runbin Duan |
| collection | DOAJ |
| description | The adsorption performance of pyridine onto polyaluminium chloride (PAC) and anionic polyacrylamide (APAM) water treatment residuals (WTRs) was investigated by batch experiments. This study confirmed the assumption that PAC–APAM WTRs had the ability to remove pyridine. The non-linear Dubinin–Radushkevich model and non-linear Freundlich model better described the isotherms, indicating that the adsorption was a chemically controlled multilayer process. The pyridine adsorption rate was simultaneously controlled by external film diffusion and intraparticle diffusion. The adsorption of pyridine was an endothermic reaction with randomness increase. The pyridine adsorption decreased with pH increase. Pyridine removal was observed to be a linear increase from 6.16% to 96.18%, with the increase of dosage from 2.5 g/L to 15 g/L. The Langmuir maximum adsorption capacity was 3.605 mg/g while the theoretical isotherm saturation capacity was 9.823 mg/g. Therefore, PAC–APAM WTRs recycled into contaminated soils for remediation is expected to be an innovative alternative disposal method. More research is recommended in the future to identify detailed adsorption mechanisms and the most appropriate mixing ratio of PAC–APAM WTRs to contaminated soils under various climatic conditions. HIGHLIGHTS
The pyridine adsorption by PAC–APAM WTRs was investigated.;
The pyridine adsorption decreased with pH increase.;
The pyridine adsorption was a multilayer chemisorption process.;
The rate was controlled by external film diffusion and intraparticle diffusion.;
PAC–APAM WTRs recycling is an innovative alternative to disposal.; |
| first_indexed | 2024-12-19T19:14:56Z |
| format | Article |
| id | doaj.art-9a743889d02e48d9975a6c150bacc7ee |
| institution | Directory Open Access Journal |
| issn | 0273-1223 1996-9732 |
| language | English |
| last_indexed | 2024-12-19T19:14:56Z |
| publishDate | 2021-04-01 |
| publisher | IWA Publishing |
| record_format | Article |
| series | Water Science and Technology |
| spelling | doaj.art-9a743889d02e48d9975a6c150bacc7ee2022-12-21T20:09:10ZengIWA PublishingWater Science and Technology0273-12231996-97322021-04-018371753176310.2166/wst.2021.082082Adsorption of pyridine from aqueous solutions onto polyaluminium chloride and anionic polyacrylamide water treatment residualsRunbin Duan0Clifford B. Fedler1Xiaofei Jiao2 Department of Environmental Engineering, College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, China Department of Civil, Environmental, and Construction Engineering, Texas Tech University, Lubbock, Texas, 79409, USA Department of Environmental Engineering, College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, China The adsorption performance of pyridine onto polyaluminium chloride (PAC) and anionic polyacrylamide (APAM) water treatment residuals (WTRs) was investigated by batch experiments. This study confirmed the assumption that PAC–APAM WTRs had the ability to remove pyridine. The non-linear Dubinin–Radushkevich model and non-linear Freundlich model better described the isotherms, indicating that the adsorption was a chemically controlled multilayer process. The pyridine adsorption rate was simultaneously controlled by external film diffusion and intraparticle diffusion. The adsorption of pyridine was an endothermic reaction with randomness increase. The pyridine adsorption decreased with pH increase. Pyridine removal was observed to be a linear increase from 6.16% to 96.18%, with the increase of dosage from 2.5 g/L to 15 g/L. The Langmuir maximum adsorption capacity was 3.605 mg/g while the theoretical isotherm saturation capacity was 9.823 mg/g. Therefore, PAC–APAM WTRs recycled into contaminated soils for remediation is expected to be an innovative alternative disposal method. More research is recommended in the future to identify detailed adsorption mechanisms and the most appropriate mixing ratio of PAC–APAM WTRs to contaminated soils under various climatic conditions. HIGHLIGHTS The pyridine adsorption by PAC–APAM WTRs was investigated.; The pyridine adsorption decreased with pH increase.; The pyridine adsorption was a multilayer chemisorption process.; The rate was controlled by external film diffusion and intraparticle diffusion.; PAC–APAM WTRs recycling is an innovative alternative to disposal.;http://wst.iwaponline.com/content/83/7/1753adsorption isothermsanionic polyacrylamided–r modelpolyaluminium chloridepyridinesoil remediation |
| spellingShingle | Runbin Duan Clifford B. Fedler Xiaofei Jiao Adsorption of pyridine from aqueous solutions onto polyaluminium chloride and anionic polyacrylamide water treatment residuals Water Science and Technology adsorption isotherms anionic polyacrylamide d–r model polyaluminium chloride pyridine soil remediation |
| title | Adsorption of pyridine from aqueous solutions onto polyaluminium chloride and anionic polyacrylamide water treatment residuals |
| title_full | Adsorption of pyridine from aqueous solutions onto polyaluminium chloride and anionic polyacrylamide water treatment residuals |
| title_fullStr | Adsorption of pyridine from aqueous solutions onto polyaluminium chloride and anionic polyacrylamide water treatment residuals |
| title_full_unstemmed | Adsorption of pyridine from aqueous solutions onto polyaluminium chloride and anionic polyacrylamide water treatment residuals |
| title_short | Adsorption of pyridine from aqueous solutions onto polyaluminium chloride and anionic polyacrylamide water treatment residuals |
| title_sort | adsorption of pyridine from aqueous solutions onto polyaluminium chloride and anionic polyacrylamide water treatment residuals |
| topic | adsorption isotherms anionic polyacrylamide d–r model polyaluminium chloride pyridine soil remediation |
| url | http://wst.iwaponline.com/content/83/7/1753 |
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