Status : Verified
| Personal Name | Le, Diep Quang |
|---|---|
| Resource Title | Removal of heavy metal (Pb) ion from wastewater using modified Dimocarpus Longan seeds adsorbent |
| Date Issued | 24 June 2019 |
| Abstract | This study investigated the adsorption behavior of Lead (Pb) ions in an aqueous solution onto surface-modified material prepared from longan seed, a waste discarded from longan dried fruit processors. The adsorption equilibrium isotherm and adsorption kinetics were determined. The batch adsorption – experiments were carried out under the following condition: a) pH of initial solution (1 – 6); b) contact times (5 – 240 minutes); and, c) solid – liquid ratio (0.5 - 15 g/L). The results show that optimum conditions for Pb (II) removal were found to be at initial pH 4.5, adsorbent dosage at 5 g/L of solution, and adsorption equilibrium was reached after 30 minutes. The compatibility between the model and experimental data suggested that the Pb (II) adsorption onto the surface - modified material followed the Langmuir adsorption isotherm, and also exhibited a behavior similar to that of the Freundlich isotherm. However, Langmuir adsorption isotherm provided the best fit with a maximum adsorption capacity of 42.03 mg/g. The kinetic data followed a pseudo – second order reaction indicating that the chemical sorption was the rate – limiting step. In conclusion, the modified material produced could be considered as a potentially effective and inexpensive adsorbent material for the removal of Lead ions from aqueous solutions. |
| Degree Course | Master of Science in Environmental Engineering |
| Language | English |
| Keyword | adsorption isotherm; adsorption kinetics; Freundlich; Langmuir; Pb (II); surface-modified longan-seed |
| Material Type | Thesis/Dissertation |
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