Keywords
hoạt hóa
ion kim loại nặng
sự hấp phụ Peat
activated
heavy metal ions
adsorption
How to Cite
Abstract
In this study, peat was activated with H3PO4 at a concentration of 2.0 M. The synthesized samples were characterized by several methods such as EDX, XRD, SEM, BET and FTIR. The adsorption properties of the materials were evaluated through their ability to remove Cd2+ ions in aqueous solution. Material characteristics show that the peat sample after activation has a higher specific surface area and porosity than the raw peat sample. The study shows that experimental data of Cd2+ ion adsorption on activated peat is well described simultaneously by both Langmuir and Freundlich isotherm models, however the Langmuir isotherm model appears to be more suitable. The activated peat material reached the maximum adsorption capacity qm 29.07 mg/g. In addition, the study also shows that the adsorption of Cd2+ ions on activated peat follows the apparent second-order kinetic model. From the above research results, it shows that adsorbent materials from peat have great potential in remove heavy metal ions in aqueous solution.
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