Adsorption Property of Pb(II) by the Laterite-Bentonite Mixture Used as Waste Landfill Liner
To assess the potential use of laterite-bentonite mixture as waste landfill liner, a range of batch tests were conducted to study the influence of contact time, solid to solution ratio, pH, ion strength, and temperature on Pb(II) adsorption. The experimental results showed that the uptake of Pb(II)...
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2019/2879156 |
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| author | Yong-gui Chen Xue-min Liu Hong-nan Lei Wei-min Ye Yu-jun Cui |
| author_facet | Yong-gui Chen Xue-min Liu Hong-nan Lei Wei-min Ye Yu-jun Cui |
| author_sort | Yong-gui Chen |
| collection | DOAJ |
| description | To assess the potential use of laterite-bentonite mixture as waste landfill liner, a range of batch tests were conducted to study the influence of contact time, solid to solution ratio, pH, ion strength, and temperature on Pb(II) adsorption. The experimental results showed that the uptake of Pb(II) by laterite-bentonite mixture increases with the increase of contact time and the adsorption equilibrium can be reached within 30 minutes. This process can be delineated well using a pseudo-second-order kinetics equation. Besides, with the increase of solid to solution ratio (s/w) and pH, Pb(II) will be adsorbed more by the laterite-bentonite mixture. However, the uptake of Pb(II) will decrease when ion strength rises in the solution and this is due to the competitive adsorption and cation exchange between different cations. When conducting the batch test at 298 K and 323 K, respectively, the experiment results showed significant growth when temperature increases because the adsorption process is an endothermic reaction. This influence of temperate can be described better by the Langmuir isotherm model than that by the Freundlich isotherm model. In each experiment condition, the uptake of Pb(II) increases with the increasing of bentonite content, indicating a good improvement in the effect of bentonite on laterite used as landfill liner. |
| format | Article |
| id | doaj-art-aeaf62764f6e4e9cb5cb0ef3de12985c |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-aeaf62764f6e4e9cb5cb0ef3de12985c2025-08-20T03:38:59ZengWileyAdvances in Civil Engineering1687-80861687-80942019-01-01201910.1155/2019/28791562879156Adsorption Property of Pb(II) by the Laterite-Bentonite Mixture Used as Waste Landfill LinerYong-gui Chen0Xue-min Liu1Hong-nan Lei2Wei-min Ye3Yu-jun Cui4Key Laboratory of Geotechnical & Underground Engineering of Ministry of Education, Department of Geotechnical Engineering, Tongji University, Shanghai 200092, ChinaKey Laboratory of Geotechnical & Underground Engineering of Ministry of Education, Department of Geotechnical Engineering, Tongji University, Shanghai 200092, ChinaKey Laboratory of Geotechnical & Underground Engineering of Ministry of Education, Department of Geotechnical Engineering, Tongji University, Shanghai 200092, ChinaKey Laboratory of Geotechnical & Underground Engineering of Ministry of Education, Department of Geotechnical Engineering, Tongji University, Shanghai 200092, ChinaLaboratoire Navier/CERMES, Ecole des Ponts-ParisTech, 6-8 Av. Blaise Pascal, Cité Descartes, 77455 Marne-la-Vallée, FranceTo assess the potential use of laterite-bentonite mixture as waste landfill liner, a range of batch tests were conducted to study the influence of contact time, solid to solution ratio, pH, ion strength, and temperature on Pb(II) adsorption. The experimental results showed that the uptake of Pb(II) by laterite-bentonite mixture increases with the increase of contact time and the adsorption equilibrium can be reached within 30 minutes. This process can be delineated well using a pseudo-second-order kinetics equation. Besides, with the increase of solid to solution ratio (s/w) and pH, Pb(II) will be adsorbed more by the laterite-bentonite mixture. However, the uptake of Pb(II) will decrease when ion strength rises in the solution and this is due to the competitive adsorption and cation exchange between different cations. When conducting the batch test at 298 K and 323 K, respectively, the experiment results showed significant growth when temperature increases because the adsorption process is an endothermic reaction. This influence of temperate can be described better by the Langmuir isotherm model than that by the Freundlich isotherm model. In each experiment condition, the uptake of Pb(II) increases with the increasing of bentonite content, indicating a good improvement in the effect of bentonite on laterite used as landfill liner.http://dx.doi.org/10.1155/2019/2879156 |
| spellingShingle | Yong-gui Chen Xue-min Liu Hong-nan Lei Wei-min Ye Yu-jun Cui Adsorption Property of Pb(II) by the Laterite-Bentonite Mixture Used as Waste Landfill Liner Advances in Civil Engineering |
| title | Adsorption Property of Pb(II) by the Laterite-Bentonite Mixture Used as Waste Landfill Liner |
| title_full | Adsorption Property of Pb(II) by the Laterite-Bentonite Mixture Used as Waste Landfill Liner |
| title_fullStr | Adsorption Property of Pb(II) by the Laterite-Bentonite Mixture Used as Waste Landfill Liner |
| title_full_unstemmed | Adsorption Property of Pb(II) by the Laterite-Bentonite Mixture Used as Waste Landfill Liner |
| title_short | Adsorption Property of Pb(II) by the Laterite-Bentonite Mixture Used as Waste Landfill Liner |
| title_sort | adsorption property of pb ii by the laterite bentonite mixture used as waste landfill liner |
| url | http://dx.doi.org/10.1155/2019/2879156 |
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