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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Simsek, Halis Kobya, Mehmet Khan, Eakalak Bezbaruah, Achintya N. |
| Description | Country affiliation: United States Author Affiliation: Simsek H ( a Department of Agricultural and Biosystems Engineering , North Dakota State University , Fargo , ND , USA.) |
| Abstract | The removal of cyanide (CN-) from aqueous solutions using a strongly basic ion-exchange resin, Purolite A-250, was investigated. The effects of contact time, initial CN- concentration, pH, temperature, resin dosage, agitation speed, and particle size distribution on the removal of CN- were examined. The adsorption equilibrium data fitted the Langmuir isotherm very well. The maximum CN- adsorption capacity of Purolite A-250 was found to be 44â mgâ CN-â g(-1) resin. More than 90% CN- adsorption was achieved for most CN- solutions (50, 100, and 200â mgâ CN-â L(-1)) with a resin dose of 2â gâ L(-1). The equilibrium time was â¼20â min, optimum pH was 10.0-10.5, and optimum agitation speed was 150â rpm. An increase in adsorption of CN- with increasing resin dosage was observed. Adsorption of CN- by the resin was marginally affected (maximum 4% variation) within an environmentally relevant temperature range of 20-50 °C. Fixed-bed column (20.5â mm internal diameters) experiments were performed to investigate the effects of resin bed depth and influent flow rate on breakthrough behaviour. Breakthrough occurred in 5â min for 0.60â cm bed depth while it was 340â min for 5.40â cm bed depth. Adsorption capacity was 25.5â mgâ CN-â g(-1) for 5â mLâ min(-1) flow rate and 3.9â mgâ CN-â g(-1) for 20â mLâ min(-1) flow rate. The research has established that the resin can be effectively used for CN- removal from aqueous solutions. |
| File Format | HTM / HTML |
| ISSN | 09593330 |
| Issue Number | 13-16 |
| Volume Number | 36 |
| e-ISSN | 1479487X |
| Journal | Environmental Technology |
| Language | English |
| Publisher | Taylor & Francis |
| Publisher Date | 2015-07-01 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Environmental Health Cyanides Isolation & Purification Ion Exchange Resins Chemistry Models, Chemical Water Pollutants, Chemical Water Purification Methods Adsorption Computer Simulation Hydrogen-ion Concentration Kinetics Ultrafiltration Journal Article |
| Content Type | Text |
| Resource Type | Article |
| Subject | Environmental Chemistry Waste Management and Disposal Medicine Water Science and Technology |
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