Activated Carbon Prepared From Pomegranate Peel Microwave Assisted Koh Activation For Dyes Adsorption
Penghasilan karbon teraktif berasaskan kulit buah delima (KTKBD) melalui pengaktifan KOH berbantukan gelombang mikro telah berjaya dikaji. KTKBD yang terhasil telah digunakan untuk penyingkiran pewarna malacit hijau (MH) dan remazol brilliant biru reaktif (RBBR) daripada larutan akuas. KTKBD memp...
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| Format: | Thesis |
| Language: | English |
| Published: |
2013
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| Subjects: | |
| Online Access: | http://eprints.usm.my/40670/1/Activated_Carbon_Prepared_From_Pomegranate_Peel_Microwave_Assisted_Koh_Activation_For_Dyes_Adsorption.pdf |
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| Summary: | Penghasilan karbon teraktif berasaskan kulit buah delima (KTKBD) melalui
pengaktifan KOH berbantukan gelombang mikro telah berjaya dikaji. KTKBD yang
terhasil telah digunakan untuk penyingkiran pewarna malacit hijau (MH) dan remazol
brilliant biru reaktif (RBBR) daripada larutan akuas. KTKBD mempunyai luas
permukaan yang tinggi 941.02 m2/g dan menunjukkan struktur liang meso tidak seragam
serta terdapat pelbagai kumpulan berfungsi pada permukaan KTKBD. Kesan kepekatan
awal pewarna (50-500 mg/L), masa sentuh (0-24 h), suhu larutan (30-60°C) dan pH
larutan (2-12) telah dinilai melalui kajian penjerapan berkelompok. Jumlah penjerapan
pewarna meningkat dengan peningkatan suhu, kepekatan awal pewarna dan masa
sentuh. Penjerapan pewarna MH dan pewarna RBBR ke atas KTKBD adalah terbaik
dipadankan oleh model Freundlich. Penjerapan kinetik MH dan RBBR ke atas KTKBD
terbaik dipadankan oleh model kinetik pseudo-tertib kedua. Melalui kajian
termodinamik, penjerapan pewarna MH dan RBBR ke atas KTKBD adalah berlaku
secara jerapan fizikal, spontan dan endotermik. Melalui kajian mekanisma, kadar
penjerapan dikawal oleh mekanisma serapan-filem.
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The production of pomegranate peel based activated carbon (PPAC) through
microwave assisted KOH activation has been successfully investigated. PPAC produced
was used for removal of malachite green (MG) and remazol brilliant blue reactive
(RBBR) dyes from aqueous solution. The PPAC has high surface area of 941.02 m2/g
and demonstrated heterogeneous mesoporous type of pore structure with a presence of
various functional groups on the PPAC’s surface. The effects of adsorbate initial
concentration (50-500 mg/L), contact time (0-24 h), solution temperature (30-60oC) and
solution pH (2-12) were evaluated through batch adsorption test. All dyes adsorption
uptakes increased with increasing temperature, initial dyes concentration and contact
time. Adsorption of MG and RBBR dyes onto PPAC were best fitted by Freundlich
model. Adsorption kinetic of MG and RBBR dyes onto PPAC were best fitted by
pseudo-second-order kinetic model. From the thermodynamic study, the MG and RBBR
adsorption onto PPAC were physically controlled type, spontaneous and endothermic in
nature. From the mechanism study, the adsorption rate was governed by film diffusion
mechanism.
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