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Preparation, characterization, and dye removal study of activated carbon prepared from palm kernel shell

García, García and Sedran, Juan Rafael and Zaini, Ulises and Zakaria, Muhammad Abbas Ahmad and Akmar, Zainul (2018) Preparation, characterization, and dye removal study of activated carbon prepared from palm kernel shell. Environmental Science and Pollution Research, 25 (6). pp. 5076-5085. ISSN 0944-1344

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Official URL: http://dx.doi.org/10.1007/s11356-017-8975-8

Abstract

Palm oil mill wastes (palm kernel shell (PKS)) were used to prepare activated carbons, which were tested in the removal of colorants from water. The adsorbents were prepared by 1-h impregnation of PKS with ZnCl2 as the activating agent (PKS:ZnCl2 mass ratios of 1:1 and 2:1), followed by carbonization in autogenous atmosphere at 500 and 550 °C during 1 h. The characterization of the activated carbons included textural properties (porosity), surface chemistry (functional groups), and surface morphology. The dye removal performance of the different activated carbons was investigated by means of the uptake of methylene blue (MB) in solutions with various initial concentrations (25–400 mg/L of MB) at 30 °C, using a 0.05-g carbon/50-mL solution relationship. The sample prepared with 1:1 PKS:ZnCl2 and carbonized at 550 °C showed the highest MB adsorption capacity (maximum uptake at the equilibrium, qmax = 225.3 mg MB / g adsorbent), resulting from its elevated specific surface area (BET, 1058 m2/g) and microporosity (micropore surface area, 721 m2/g). The kinetic experiments showed that removals over 90% of the equilibrium adsorptions were achieved after 4-h contact time in all the cases. The study showed that palm oil mill waste biomass could be used in the preparation of adsorbents efficient in the removal of colorants in wastewaters.

Item Type:Article
Uncontrolled Keywords:Activated carbon, Dye removal
Subjects:T Technology > TP Chemical technology
Divisions:Chemical and Energy Engineering
ID Code:86013
Deposited By: Widya Wahid
Deposited On:30 Aug 2020 16:49
Last Modified:30 Aug 2020 16:49

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