Akbari, H. and Gholami, M. and Akbari, H. and Adibzadeh, A. and Taghavi, L. and Hayati, B. and Nazari, S. (2020) Poly (amidoamine) generation 6 functionalized Fe3O4@SiO2/GPTMS core-shell magnetic NPs as a new adsorbent for Arsenite adsorption: Kinetic, isotherm and thermodynamic studies 03 Chemical Sciences 0306 Physical Chemistry (incl. Structural). Journal of Environmental Health Science and Engineering, 18 (1). pp. 253-265.
Full text not available from this repository.Abstract
In this survey a new route has been developed the preparation of poly (amidoamine) generation 6 (PAMAM-G6) dendrimer functionalized Fe3O4/SiO2 nanoparticle and was used for arsenite (As (III)) adsorption. SiO2 was first grafted onto the surface of Fe3O4 to formation a core-shell structure. Then the introduction of epoxy rings were done by hydrolysis of methylsilane groups of 3-Glycidoxypropyltrimethoxysilane (GPTMS) on OH groups of SiO2 and afterwards, PAMAM-G6 reacted with epoxy rings of GPTMS to obtain a multiamino magnetic adsorbent. The as-prepared nanocomposite was characterized by TEM, Zeta potential, FESEM, VSM, FTIR, Raman and XPS techniques. The effects of reaction time from 5 to 50 min, initial As (III) concentration in the range of 1-10 mgL-1, initial adsorbent concentration in the range of 10-50 mgL-1 and initial pH in the range 3-8 were studied. The resulting of kinetic and isotherm models displays high adsorption affinity (233 mg/g) for As (III) and the adsorbent can reach the adsorbent can reach the adsorption equilibrium at a neutral pH (7). The As (III) loaded nanocomposite could be separated readily from aqueous solution by magnetic and regenerated simply via NaOH. The study of the adsorption procedure showed that the pseudo-second order kinetics and Langmuir isotherm well-fitted with the experimental data of As (III) adsorption onto nanocomposite. © 2020 Springer Nature Switzerland AG.
| Item Type: | Article |
|---|---|
| Additional Information: | cited By 0 |
| Uncontrolled Keywords: | adsorption; arsenite; iron oxide; nanoparticle; polymer; reaction kinetics; thermodynamics |
| Subjects: | QU Biochemistry. Cell Biology and Genetics |
| Depositing User: | eprints admin |
| Date Deposited: | 09 Sep 2020 05:11 |
| Last Modified: | 09 Sep 2020 05:11 |
| URI: | http://eprints.iums.ac.ir/id/eprint/23875 |
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