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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Tseng, Ru-Ling Wu, Keng-Tung Wu, Feng-Chin Juang, Ruey-Shin |
| Description | Country affiliation: Taiwan Author Affiliation: Tseng RL ( Department of Safety, Health and Environmental Engineering, National United University, 1 Lien Da, Kung-Ching Li, Miao-Li 360, Taiwan.) |
| Abstract | This study uses rate parameters in pseudo-first-order (PFO) and pseudo-second-order (PSO) equations (k(1) and k(2)q(e), respectively) to judge the extent for approaching equilibrium in an adsorption process. Out of fifty-six systems collected from the literature, the adsorption processes with a k(2)q(e) value between 0.1 and 0.8 min(-1) account for as much as 70% of the total. These are classified as fast processes. This work compares the validity of PFO and PSO equations for the adsorption of phenol, 4-chlorophenol (4-CP), and 2,4-dichlorophenol (2,4-DCP) on activated carbons prepared from pistachio shells at different NaOH/char ratios. The activated carbons, recognized as microporous materials, had a surface area ranging from 939 to 1936 m(2)/g. Findings show that the adsorption of phenol, 4-CP, and 2,4-DCP on activated carbons had a k(2)q(e) value of 0.15-0.58 min(-1), reflecting the fast process. Evaluating the operating time by rate parameters revealed that k(2)q(e) was 1.6-1.8 times larger than k(1). These findings demonstrate the significance of using an appropriate kinetic equation for adsorption process design. |
| File Format | HTM / HTML |
| ISSN | 03014797 |
| Issue Number | 11 |
| Volume Number | 91 |
| e-ISSN | 10958630 |
| Journal | Journal of Environmental Management |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2010-11-01 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Environmental Discipline Science Charcoal Chemistry Chlorophenols Pharmacokinetics Phenols Pistacia Water Pollutants, Chemical Water Purification Methods Biodegradation, Environmental Sodium Hydroxide Surface Properties Journal Article Research Support, Non-u.s. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Waste Management and Disposal Medicine Environmental Engineering Management, Monitoring, Policy and Law |
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