| Adsorption kinetics of phenol on bentonite modified with BS-18 |
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| DOI：10.7606/j.issn.1000-7601.2012.03.35 |
| Key Words: amphoteric modification bentonite phenol adsorption characteristics of kinetics |
| Author Name | Affiliation | | ZHANG Bin | College of Resources and Environment,NorithuestA&F University, Yangling, Shaanxi 712100, China | | MENG Zhaofu | College of Seiences, Norihuest A & F University, Yangling, Shaanxi 712100, China | | LI Ting | College of Resources and Environment,NorithuestA&F University, Yangling, Shaanxi 712100, China | | LI Bin | College of Seiences, Norihuest A & F University, Yangling, Shaanxi 712100, China | | YANG Qin | College of Resources and Environment,NorithuestA&F University, Yangling, Shaanxi 712100, China | | QI Yanjie | College of Resources and Environment,NorithuestA&F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| The characteristics of adsorption kinetics of phenol on Octadecane-Betaine(BS-18)modified ben-tonite along with the adsorption mechanism were investigated at different conditions of modifieation ratio, temperature and pH. The results showed that the adsorption velocity parameter of phenol on modified bentonite was greater than that on unmodified bentonite, and increased with the increase of modification ratio, indicating that the adsorption velocity of the bentonite to phenol could be accelerated significantly by BS-18 modification. Phenol adsorption was faster at low tem-perature, and varied little in pH4~8, while it declined rapidly beyond pH 8. Pseudo-second-order kinetic model was the best to describe phenol adsorption kinetic
curve on BS-18 modified bentonite. |
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