The starch modified montmorillonite for the removal of Pb(II), Cd(II) and Ni(II) ions from aqueous solutions
| Autor: | Tam Luu Hoang, Chi Nhan Ha Thuc, Hai Chu Van, Dang Khoa Vo Nguyen, Hung Nguyen Van |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Sorbent
Scanning electron microscope General Chemical Engineering Metal ions in aqueous solution Adsorbent 02 engineering and technology 010402 general chemistry 01 natural sciences Metal lcsh:Chemistry chemistry.chemical_compound symbols.namesake Adsorption Montmorillonite/starch Aqueous solution Chemistry Isotherm adsorption Langmuir adsorption model General Chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences Montmorillonite lcsh:QD1-999 visual_art visual_art.visual_art_medium symbols 0210 nano-technology Nuclear chemistry |
| Zdroj: | Arabian Journal of Chemistry, Vol 13, Iss 9, Pp 7212-7223 (2020) |
| ISSN: | 1878-5352 |
| Popis: | In the present study, we attempted to synthesize a novel sorbent from the starch modified montmorillonite for the removal of Pb(II), Cd(II), and Ni(II) ions from aqueous solutions. Structure and properties of the adsorbent were characterized by Fourier-transformed infrared(FT-IR) spectroscopy, X-ray diffraction (XRD), and Field emission scanning electron microscopic (FE-SEM) techniques. Batch experiments were confirmed through the effect of different conditions including pH, contact time, initial metal concentration and adsorbent dose. Specifically, the optimum value of adsorbent dose was achieved as 20 g/l for the removal of almost metal ions. The adsorption data was fitted with the optimum pH value as 5 for all experiments. The contact time at which the uptake of maximum metal adsorption was observed within 45 min for Pb(II), 90 min for Cd(II), and 60 min for Ni(II). In addition, it was revealed in our study that the equilibrium data obeyed the Langmuir model, and the adsorption kinetic followed a pseudo second-order rate model. Obtained results were noticeable for a modified phyllosilicate adsorbent, and with such a simple and low-cost modification for montmorillonite, the potential of this material as an economical and effective adsorbent for the removal of metal ions from aqueous solution was considerably elevated. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|