Adsorption performance of coconut shell activated carbon for the removal of chlorate from chlor-alkali brine stream
| Autor: | Shyam Lakshmanan, Thanapalan Murugesan |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Cocos
Environmental Engineering Inorganic chemistry 0211 other engineering and technologies chemistry.chemical_element 02 engineering and technology Alkalies 010501 environmental sciences Waste Disposal Fluid 01 natural sciences Chloride chemistry.chemical_compound Adsorption Brining medicine 0105 earth and related environmental sciences Water Science and Technology 021110 strategic defence & security studies Chromatography Chemistry Chlorate Alkali metal Charcoal Chlorates Salts Carbon medicine.drug Waste disposal Activated carbon |
| Zdroj: | Water Science and Technology. 74:2819-2831 |
| ISSN: | 1996-9732 0273-1223 |
| DOI: | 10.2166/wst.2016.455 |
| Popis: | Activated carbon from coconut shell was used to investigate the adsorption of chlorate from a chlor-alkali plant's brine stream. The effect of pH, flowrate, chlorate and chloride concentration on the breakthrough curves were studied in small-scale column trials. The results obtained show enhanced adsorption at low flowrates, higher chlorate concentrations, and at a pH of 10. These studies show that introducing an activated carbon adsorption column just before the saturator would remove sufficient quantities of chlorate to allow more of the chlor-alkali plant's brine stream to be reused. From column dynamic studies, the Thomas model showed close approximation when the chlorate in the effluent was higher than breakthrough concentrations and there was close correlation at high influent concentration. The qo (maximum adsorption capacity) values were close to those obtained experimentally, indicating close representation of the breakthrough curve by the Thomas model. |
| Databáze: | OpenAIRE |
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