Mechanistic pathways of cationic and anionic surfactants sorption by kaolinite in water
| Autor: | Ridha Djellabi, Kamel Guerfi, Alain Iost, Alex Montagne, Mamoun Fellah, Kirill Borodin, Naouel Hezil, Aleksei Obrosov |
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| Rok vydání: | 2020 |
| Předmět: |
Ammonium bromide
Health Toxicology and Mutagenesis 010501 environmental sciences 01 natural sciences chemistry.chemical_compound Surface-Active Agents Adsorption Pulmonary surfactant Environmental Chemistry Kaolinite Freundlich equation Sodium dodecyl sulfate Kaolin 0105 earth and related environmental sciences technology industry and agriculture Cationic polymerization Sodium Dodecyl Sulfate Water Sorption General Medicine Pollution Kinetics chemistry Chemical engineering Water Pollutants Chemical |
| Zdroj: | Environmental science and pollution research international. 28(6) |
| ISSN: | 1614-7499 |
| Popis: | Surfactants are widely used in many chemical industries and as primary components of cleaning detergents due to their specific characteristics, which in turn results in high pollution of domestic and industrial wastewaters by such substances. In this study, the mechanistic pathways of the adsorption of cationic benzyl-dimethyl-dodecyl ammonium bromide (BDDAB) and anionic sodium dodecyl sulfate (SDS) surfactants on kaolinite clay in water were investigated. The results showed that the adsorption of anionic surfactant (SDS) on kaolinite is better compared with cationic surfactant (BDDAB), wherein the ♦maximum adsorption capacity was found 161.4 μmol g−1 and 234 μmol g−1 for BDDAB and SDS, respectively. Adsorption kinetics were the best suited to pseudo-second-order model for both BDDAB and SDS with an adsorption rate constant of 0.028 g μmol−1 min−1 and 0.023 g μmol−1 min−1, respectively. Meanwhile, the adsorption of BDDAB by kaolinite showed that the isotherm adsorption tended to follow the Langmuir-Freundlich and Freundlich isotherm models. However, the SDS adsorption isotherm obeyed only the Langmuir-Freundlich model. |
| Databáze: | OpenAIRE |
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