AKTIVASI KULIT DURIAN UNTUK BIOSORBEN PENGARUH AKTIVATOR TERHADAP KARAKTERISTIK STRUKTUR DAN KAPASITAS ADSORPSI METHYLENE BLUE
| Main Authors: | , HANGGARA SUDRAJAT, , Prof. Ir. I Made Bendiyasa, M.Sc., Ph.D. |
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| Format: | Thesis NonPeerReviewed |
| Terbitan: |
[Yogyakarta] : Universitas Gadjah Mada
, 2011
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| Subjects: | |
| Online Access: |
https://repository.ugm.ac.id/88659/ http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=50500 |
Daftar Isi:
- Adsorption by activated carbon has been widely used to remove certain classes of dyes from wastewaters, especially those that are not easily biodegradable. However, commercially available activated carbons are quite expensive, and therefore, there is much interest in the development of alternative sorbents. It is well known that biomass like agricultural wastes can be employed as biosorbents. In this study, durian peel, an agricultural waste, was utilized as raw material for preparation of biosorbent to remove methylene blue dye from aqueous solution. Biosorbents were prepared with chemical activation using H2O2, NaOH and H2SO4 ranging from 0.1 to 1 M. To obtain a complete description of structure, morphology, composition and surface chemistry of biosorbents, characterization was performed by using both instrumental and conventional techniques, such as 13C-NMR, FTIR, EDX, SEM, Boehm titration and pH drift. The effects of various adsorption parameters were investigated in the batch mode for selected biosorbent having highest adsorption capacity. Equilibrium data were also evaluated by means of Langmuir and Freundlich models, while thermodynamic parameters were then calculated on the basis of adsorption equilibrium constants obtained from both models. Adsorption mechanisms were quantitatively determined by sequential desorption method using specific solvents. Furthermore, molecular modeling, a novel theoretical method, was applied to predict interaction patterns of methylene blue on some structural units of biosorbent. The results showed that: (i) the effectiveness of three different activating agents was in order of H2SO4 < NaOH < H2O2