Adsorption of a Non-Ionic Surfactant on Soils: A Model Study
The adsorption of the widely used non-ionic surfactant Triton X-100 (TX) onto three model inorganic soil components (silica powder, γ-alumina and calcite) was investigated in a series of batch experiments in which the aqueous phase was equilibrated with the solid under different solution conditions....
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| Format: | Article |
| Language: | English |
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SAGE Publishing
2006-05-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1260/026361706779319661 |
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| _version_ | 1841564586882367488 |
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| author | Xiaobo Xue Yanmei Zhou Dongshen Wang |
| author_facet | Xiaobo Xue Yanmei Zhou Dongshen Wang |
| author_sort | Xiaobo Xue |
| collection | DOAJ |
| description | The adsorption of the widely used non-ionic surfactant Triton X-100 (TX) onto three model inorganic soil components (silica powder, γ-alumina and calcite) was investigated in a series of batch experiments in which the aqueous phase was equilibrated with the solid under different solution conditions. TX showed no discernable adsorption onto γ-alumina over the pH range 3.8 < pH < 12.1 and a temperature of 15°C or onto calcite at the same temperature and pH range 7.7 < pH < 11.7. However, significant and reversible adsorption from solutions was found for silica powder suspensions. The adsorption isotherms obtained for TX uptake onto silica powder were best fitted by the Freundlich model. An increase in the ionic strength of the electrolytic solution led to a decrease in the surface concentration of TX on silica powder, indicating significant electrostatic interactions between TX and silica powder particles, possibly through interaction with the surface silanol groups of the solid substrate. Increasing the pH value of the electrolyte solution from 6 to 9 led to a considerably decrease in the amount of TX adsorbed, while a decrease in the solution pH from 6 to 3 had only a slight effect on the surface concentration of adsorbed TX. The adsorption of TX onto silica powder decreased as the temperature was increased in the range 15–45°C, indicating that the adsorption process was exothermic. The magnitude of the calculated enthalpy of adsorption (ca. 10 kJ/mol) demonstrated that the uptake at the solid/liquid interface at an equilibrium pH of 6.1 was largely due to physisorption. |
| format | Article |
| id | doaj-art-cb65078314fe40e1a6442d26d0038721 |
| institution | Kabale University |
| issn | 0263-6174 2048-4038 |
| language | English |
| publishDate | 2006-05-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Adsorption Science & Technology |
| spelling | doaj-art-cb65078314fe40e1a6442d26d00387212025-01-02T22:37:59ZengSAGE PublishingAdsorption Science & Technology0263-61742048-40382006-05-012410.1260/026361706779319661Adsorption of a Non-Ionic Surfactant on Soils: A Model StudyXiaobo Xue0Yanmei Zhou1Dongshen Wang2 State Key Laboratory of Environmental Aqueous Chemistry, RCEES, Chinese Academy of Sciences, Box No. 2871, Beijing 100085, P. R. China Department of Civil and Environmental Engineering, Beijing Jiaotong University, Box No. 335, Beijing 100044, P. R. China State Key Laboratory of Environmental Aqueous Chemistry, RCEES, Chinese Academy of Sciences, Box No. 2871, Beijing 100085, P. R. ChinaThe adsorption of the widely used non-ionic surfactant Triton X-100 (TX) onto three model inorganic soil components (silica powder, γ-alumina and calcite) was investigated in a series of batch experiments in which the aqueous phase was equilibrated with the solid under different solution conditions. TX showed no discernable adsorption onto γ-alumina over the pH range 3.8 < pH < 12.1 and a temperature of 15°C or onto calcite at the same temperature and pH range 7.7 < pH < 11.7. However, significant and reversible adsorption from solutions was found for silica powder suspensions. The adsorption isotherms obtained for TX uptake onto silica powder were best fitted by the Freundlich model. An increase in the ionic strength of the electrolytic solution led to a decrease in the surface concentration of TX on silica powder, indicating significant electrostatic interactions between TX and silica powder particles, possibly through interaction with the surface silanol groups of the solid substrate. Increasing the pH value of the electrolyte solution from 6 to 9 led to a considerably decrease in the amount of TX adsorbed, while a decrease in the solution pH from 6 to 3 had only a slight effect on the surface concentration of adsorbed TX. The adsorption of TX onto silica powder decreased as the temperature was increased in the range 15–45°C, indicating that the adsorption process was exothermic. The magnitude of the calculated enthalpy of adsorption (ca. 10 kJ/mol) demonstrated that the uptake at the solid/liquid interface at an equilibrium pH of 6.1 was largely due to physisorption.https://doi.org/10.1260/026361706779319661 |
| spellingShingle | Xiaobo Xue Yanmei Zhou Dongshen Wang Adsorption of a Non-Ionic Surfactant on Soils: A Model Study Adsorption Science & Technology |
| title | Adsorption of a Non-Ionic Surfactant on Soils: A Model Study |
| title_full | Adsorption of a Non-Ionic Surfactant on Soils: A Model Study |
| title_fullStr | Adsorption of a Non-Ionic Surfactant on Soils: A Model Study |
| title_full_unstemmed | Adsorption of a Non-Ionic Surfactant on Soils: A Model Study |
| title_short | Adsorption of a Non-Ionic Surfactant on Soils: A Model Study |
| title_sort | adsorption of a non ionic surfactant on soils a model study |
| url | https://doi.org/10.1260/026361706779319661 |
| work_keys_str_mv | AT xiaoboxue adsorptionofanonionicsurfactantonsoilsamodelstudy AT yanmeizhou adsorptionofanonionicsurfactantonsoilsamodelstudy AT dongshenwang adsorptionofanonionicsurfactantonsoilsamodelstudy |