| Titre : |
Preparation of maleic acid modified peanut shell adsorbent and its adsorption performance for Cr(VI) |
| Type de document : |
texte imprimé |
| Auteurs : |
Zeng Chunhui, Auteur ; Zhang Ye, Auteur ; Feng Hanjun, Auteur ; Qi Lu, Auteur |
| Année de publication : |
2022 |
| Article en page(s) : |
p. 246-251 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Absorbants et adsorbants
Caractérisation
Chrome hexavalent
Coque d'arachide
|
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
Peanut shell adsorbents prepared by microwave pretreatment and maleic acid modification technology, were used to study the adsorption properties for Cr(VI). Meanwhile, structural characterisation, optimisation of adsorption conditions, isotherm adsorption and adsorption kinetics were critically investigated through experiments and detection techniques. XRD analysis showed that the crystallinity of peanut shells decreased significantly after microwave pretreatment. FTIR analysis testified that carboxyl groups and ester groups were successfully introduced into the structure of maleic acid modified peanut shells (MMPS). The results of orthogonal test and single factor experiments indicated that pH value had the greatest effect on Cr(VI) adsorption process. Moreover, the Cr(VI) adsorption rate (CrAR) reached the maximum value of 99.3 % under the optimal condition (MMPS dosage: 6g, adsorption time: 45 minutes, pH3, adsorption temperature: 80°C, Cr(VI) initial concentration: 30mg/L), which was much higher than that of unmodified peanut shells. The adsorption behaviour conformed to quasi-second-order kinetic equation and Langmuir isothermal adsorption model, and the adsorption was dominated by monolayer. |
| Note de contenu : |
- EXPERIMENTAL PROCEDURES : Raw materials and instruments - Pretreatement of peanut shells - Preparation of maleic acid modified peanut shell (MMPS) adsorbent - Adsorption tests of Cr(VI) by MMPS - Adsorption kinetics test - Isothermal adsorption test - Characterisation
- RESULTS AND DISCUSSION : XRD analysis - FTIR analysis - Orthogonal experiment results - Influence of pH on Cr(VI) adsorption - Adsorption kinetic model and analysis - Isothermal adsorption model and analysis
- Table 1 : Results and analysis processing of orthogonal experiments
- Table 2 : Kinetic parameters for the adsorption of MMPS on CR(VI)
- Table 3 : Adsorption isothermal parameters of Langmuir and Freundlich models |
| En ligne : |
https://drive.google.com/file/d/1SjwOX76ma1rIRt9NGce2YIYwaFI6iJGB/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38516 |
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 106, N° 6 (11-12/2022) . - p. 246-251
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