| Autor: |
Chadrudee Sirilamduan1*,, Chakkrit Umpuch2, Pairat Kaewsarn |
| Jazyk: |
angličtina |
| Rok vydání: |
2011 |
| Předmět: |
|
| Zdroj: |
Songklanakarin Journal of Science and Technology (SJST), Vol 33, Iss 6, Pp 725-732 (2011) |
| Druh dokumentu: |
article |
| ISSN: |
0125-3395 |
| Popis: |
The removal of Cu2+ ions by adsorption using biomass derived from Zalacca edulis peel was studied in a batch system.The effects of pH and chemical pre-treatment of the biomass by the use of CaCl2 with different thermal conditions and initialconcentrations were also determined. The results showed that chemical pre-treatment by CaCl2 enhanced the capacity of Cu2+ions biosorption. The equilibrium sorption data of untreated Zalacca edulis peel and Zalacca edulis peel pre-treated withCaCl2 were fitted well by both Langmuir and Freundlich isotherms equations. According to the Langmuir equation, the maximumuptake of Cu2+ ions by the use of Zalacca edulis peel pre-treated with CaCl2 was found to be 27.03 mg g-1 at pH 5. Therate of adsorption was found to conform to pseudo-second order kinetics with good correlation. The binding between heavymetal Cu2+ ions and chemically pre-treated biosorbent was confirmed by the use of scanning electron microscope combinedwith energy dispersive X-ray analysis and electron probe microanalyser. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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