Preparation of rubber seed coat based activated carbon by microwave induced koh activation and its application in malachite green and remazol brilliant violet-5r adsorption
Kajian penghasilan karbon teraktif daripada kulit biji getah (KTBG) melalui
pengaktifan radiasi gelombang mikro dan jerap isi KOH untuk penjerapan pewarna
malacit hijau (MH) dan remazol ungu berkilau 5R (RUB) daripada larutan akuas.
KTBG yang terhasil adalah berliang meso dengan dengan luas permukaan yang
tinggi (805.13m2/g) dan memaparkan struktur liang yang heterogen. Kesan daripada
kepekatan awal pewarna (100-500 mg/L), masa sentuh (0-24 jam), suhu larutan (30-
60oC), dan pH larutan (4-10) telah dinilai melalui kajian penjerapan berkelompok.
Penjerapan MH dan RUB meningkat dengan meningkatnya kepekatan pewarna dan
masa sentuh. Data untuk proses penjerapan berpadanan dengan model garisan sesuhu
Freundlich dan sesuai dihuraikan oleh model kinetik pseudo tertib pertama. Kapasiti
penjerapan maksima sebnyak 80.55% untuk MH dan 76.85% untuk RUB oleh
KTBG. Keputusan penyelidikan menunujukkan bahawa karbon teraktif daripada biji
getah adalah bahan pemula untuk penjerapan pewarna daripada larutan akuas.
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This study presents the preparation of rubber seed coat based activated carbon
(RSCAC) via microwave irradiation assisted KOH activation for adsorption of malachite
green (MG) and remazol brilliant violet-5R (RBV) in aqueous solution. RSCAC prepared
was high surface area (805.31m2/g) and exhibit heterogeneous mesoporous (average pore
diameter of 2.58nm) type of pore structures. The effects of adsorbate initial concentration
(100-500 mg/L), contact time (0-24 h) and solution temperature (30-60oC) were evaluated
through batch adsorption test. The MG and RBV dyes uptake increased with increased in
initial dye concentration and contact time. For adsorption of both dyes onto RSCAC, the
equilibrium data were favorably described by Freundlich isotherm, while adsorption kinetics
was best fitted to the pseudo-first-order model.The maximum uptake capacity of 80.55% for
MG and 76.85% for RBV by RSCAC was achieved. The findings support the feasibility of
rubber seed coat as an attractive AC’s precursor dye removal.
Preparation of rubber seed coat based activated carbon by microwave induced koh activation and its application in malachite green and remazol brilliant violet-5r adsorption