ANALISA KINETIKA PERTUKARAN ION NH4+ DAN H+ PADA ZEOLIT ALAM LAMPUNG DENGAN SHRINKING CORE MODEL
| Main Author: | Br Ginting, Simparmin |
|---|---|
| Format: | Article PeerReviewed application/pdf |
| Terbitan: |
Jurusan Teknik Kimia FT Universitas Syiah Kuala, Banda Aceh
, 2009
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| Subjects: | |
| Online Access: |
http://repository.unila.ac.id/744/1/4_Jurnal_RKL_Unsyiah_Des2009_Simparmin.pdf http://repository.unila.ac.id/744/ |
Daftar Isi:
- Ion exchange process between ion NH4+ and H+ by using zeolite as its ion exchanger is one of methods to purify water from ammonium ion content. Natural zeolites are chosen as ion exchanger because it is abundantly provided in Indonesia, especially in Lampung.The influences of reaction temperature and stirrer speed toward reaction rate constant, mass transfer coefficient and effective diffusivity in batch ion exchange process, are analysed by using shrinking core model. Processes run by mixing zeolite and ammonium solution in stirred tank at 30, 40 and 50 oC by stirrer speed variation 700, 800 and 900 rpm. Every 5 minutes up to 60 minutes, the sample is taken for ammonium ion analyses in solution.The result of the research shows that mass transfer, intraparticle diffusion and ion exchange reaction resistance influence the overall rate of reaction. The result also shows that reaction temperature and stirrer speed influence the reaction rate constant, mass transfer coefficient and effective diffusivity. The correlations of them are stated in simple empirical equation. Shrinking core model is good to describe the ion exchange kinetics between NH4+ and H+ ion in natural zeolite from Lampung with the average error range is 1,15 % – 3,71 %. Keywords: ion exchange kinetics, Lampung natural zeolite, shrinking core model.