A new organophosphorus insecticides removal process using fly ash
| dc.contributor.author | Sakellarides, T. M. | en |
| dc.contributor.author | Albanis, T. A. | en |
| dc.date.accessioned | 2015-11-24T16:57:01Z | |
| dc.date.available | 2015-11-24T16:57:01Z | |
| dc.identifier.issn | 0306-7319 | - |
| dc.identifier.uri | https://olympias.lib.uoi.gr/jspui/handle/123456789/10523 | |
| dc.rights | Default Licence | - |
| dc.subject | organophosphorus insecticides | en |
| dc.subject | adsorption-desorption | en |
| dc.subject | fly ash | en |
| dc.subject | soil mixtures | en |
| dc.subject | organic contaminants | en |
| dc.subject | surface microlayer | en |
| dc.subject | methyl parathion | en |
| dc.subject | adsorption | en |
| dc.subject | soils | en |
| dc.subject | pesticides | en |
| dc.subject | desorption | en |
| dc.subject | sorption | en |
| dc.subject | atrazine | en |
| dc.subject | system | en |
| dc.title | A new organophosphorus insecticides removal process using fly ash | en |
| heal.abstract | Fly ash and soil mixtures with a range of fly ash content from 1 to 100% were used to study adsorption and desorption of four organophosphorus insecticides, ethyl parathion, methyl parathion, fenitrothion and fenthion, in batch experiments. The object of the study was to develop a treatment process using fly ash as sorbent material to isolate/immobilize organic contaminants from aqueous solutions. The adsorption isotherms fit the Freundlich equation x/m=KdC1/n. The K-d values increase with the increase of the fly ash content. The isotherms seem to fit the S type, in mixtures of soil with a fly ash content from 0 to 10%, which implies that adsorption becomes easier as the concentration in the liquid phase increases. In mixtures of soil with a fly ash content from 25 to 50% the isotherms become L type and correspond to a decrease of site availability as the solution concentration increases. Finally in mixtures of soil with a fly ash content over 50%, C type adsorption was observed which correspond to a constant partition of the insecticides between the bulk solution and the adsorbent. Mass balance estimations show that the mean percent amounts of insecticides for a range of concentration 0.5-15 mg/l, removed by adsorption in the soil sample are 81.56% for ethyl parathion, 48.97% for methyl parathion, 67.06% for fenitrothion and 86.65% for fenthion. The adsorption increases as the fly ash content increased and reach the 100% in the "pure" fly ash. The adsorbed amounts of insecticides in mixtures of soils with >50% fly ash content, are up to 99%. In contrast, the amounts of desorption in water decrease as the fly ash content increase. The results of this research demonstrate that the fly ash shows a significant capacity for adsorption of organophosphorus compounds from aqueous solution and can be used for pesticide removal process. | en |
| heal.access | campus | - |
| heal.fullTextAvailability | TRUE | - |
| heal.identifier.secondary | <Go to ISI>://000167872200005 | - |
| heal.journalName | International Journal of Environmental Analytical Chemistry | en |
| heal.journalType | peer reviewed | - |
| heal.language | en | - |
| heal.publicationDate | 2000 | - |
| heal.recordProvider | Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείας | el |
| heal.type | journalArticle | - |
| heal.type.el | Άρθρο Περιοδικού | el |
| heal.type.en | Journal article | en |
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