Penjerapan pewarna kationik, metilena biru (MB) daripada larutan akueus ke abu kelapa
sawit karbon diaktifkan disiasat melalui proses penjerapan kelompok. Kesan pelbagai
parameter, seperti kepekatan awal (25 hingga 400 mg / L), pH penyelesaian (3-13) dan
suhu (30, 40, 50 ° C) telah dikaji. Ia telah mendapati bahawa penjerapan pewarna lebih
tinggi dalam penyelesaian alkali berbanding dalam keadaan berasid atau neutral.
Kapasiti penjerapan meningkat setelah suhu larutan peningkatan. Sesuhu Langmuir dan
sesuhu Freundlich telah digunakan untuk menganalisis data keseimbangan pada suhu
yang berbeza. Sesuhu Freundlich hampir sesuai dengan data eksperimen dan semua
pekali korelasi, R2 adalah daripada 0.90. Kinetik penjerapan data dianalisis dengan
menggunakan pseudo-tertib pertama dan model pseudo-tertib kedua. Pseudo-tertib
pertama dan pseudo-tertib kedua pemalar kadar bagi kepekatan awal yang berbeza telah
dinilai dan dibincangkan. Penjerapan metilena biru (MB) ke abu kelapa sawit karbon
teraktif sesuai dan terbaik oleh pseudo-tertib pertama kinetik. Secara keseluruhan,
keputusan mendedahkan bahawa adsorben yang disediakan adalah amat berkesan dalam
penyingkiran MB daripada larutan akueus.
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Adsorption of cationic dye, methylene blue (MB) from aqueous solution onto oil palm
ash activated carbon was investigated through batch adsorption process. The effects of
the various parameters, such as initial concentration (25 to 400 mg/L), solution pH (3 to
13) and temperature (30, 40, 50 °C) were investigated. It was found that the dye
adsorption uptakes much higher in an alkaline solutions compared in acidic or neutral
conditions. The adsorption capacity increase as the temperature of the solution is
increase. Langmuir and Freundlich isotherms were used to analyze the equilibrium data
at different temperatures. The Freundlich isotherms almost fits with the experimental
data and all correlation coefficient, R2 were than 0.90. Adsorption kinetics data were
analyzed by using pseudo-first-order and pseudo-second-order models. The pseudofirst-
order and pseudo-second-order rate constants for different initial concentrations
were evaluated and discussed. Adsorption of methylene blue onto oil palm ash activated
carbon was best fitted by pseudo-first-order kinetic. Overall, the results revealed that the
prepared adsorbent was very effective in removal of MB from aqueous solution.
Adsorption of methylene blue onto activated carbon from unburned carbon in oil palm ash / Muhammad Aliff Ashraf Hakimi