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| Taille approximative de la traduction: | pages: 5 |
| Posté le: | 08-08-2008 @15:34 (GMT) |
| Date limite: | 15-08-2008 @13:00 (GMT) |
| Quoting deadline: | 10-08-2008 @15:34 (GMT) ( délai expiré ) |
| Initié par: |
 Łukasz Machynia 0343590336 46-320 Praszka |
| Type de travail: | Traduction |
| Domaines d'expertise (générale): | Scientifique/Recherche |
| Description du travail de traduction: | To są teksty z seminariów i czasopism naukowych. Interesuje mnie tylko wstęp i podsumowanie - wyniki badań np o czym jest ta praca i jej wnioski. |
| Fragment de texte: |
1)Removal of lead from contaminated water bodies usingsea nodule as an adsorbent S. Bhattacharjee*, S. Chakrabarty, S. Maity, S. Kar, P. Thakur, G. Bhattacharyya Abstract Adsorption of water soluble lead on polymetallic sea nodule has been studied in detail. Complete decontamination of lead is possible by appropriate sea nodule dosing. Adsorption is also dependent on pH and best adsorption is achieved at pH 6. Beyond pH 6, the desorption of lead from sea nodule surface is practically zero. Residual metal concentrations in the filtrate after adsorption is negligible. Both Freundlich and Langmuir isotherms may reasonably explain adsorption of lead on sea nodule. Chemically bound moisture plays a very crucial role in lead adsorption. Lead adsorptive capability of sea nodule is practically destroyed when calcined at a temperature of 900_C. Lead loading capacity of sea nodule has been estimated at 440 mgof lead per gram of sea nodule. The performance of sea nodule as a lead adsorbent has been successfully tested over six simulated lead contaminated water systems. Lead loadingcapacity of sea nodule compares favorably with other adsorbents like activated carbon, ion exchange resin, anionic clay, granulated blast furnace slag and natural and treated zeolites. |
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