Journal
JOURNAL OF MOLECULAR LIQUIDS
Volume 241, Issue -, Pages 386-398Publisher
ELSEVIER
DOI: 10.1016/j.molliq.2017.05.037
Keywords
Atenolol ATE; Acebutolol ACE; Carbamazepine CBM; Pharmaceutically active compounds.PhACs; Point of zero charge pH(pzc); Adsorption; Palm kernel shell (PKS)
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Palm kernel shell (PKS) was physically activated by carbon dioxide at 900 degrees C for 1.5 h and tested for its ability to remove Atenolol (ATE), Acebutolol (ACE) and Carbamazepine (CBM), which are pharmaceutically active compounds (PhACs). Rapid adsorption of PhACs took place in the first 90 min and reached equilibrium after 4 h. The kinetic data were best fitted by the Ritchie-second-order model and confirmed by the diffusion-chemisorption model implying a predominantly chemisorption mechanism. The isotherm adsorption studies showed that the maximum adsorption capacities of ATE, ACE and CBM were 0.69,0.67 and 0.72 mmol/g respectively. The best fit isotherm was the Sips equation. (C) 2017 Elsevier B.V. All rights reserved.
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