| Titre : |
Preparation and application of modified corn straw as a biosorbent for Cr(VI) adsorption |
| Type de document : |
texte imprimé |
| Auteurs : |
Zeng Chunhui, Auteur ; Zhang Ye, Auteur ; Xu Zhang, Auteur ; Qi Lu, Auteur |
| Année de publication : |
2019 |
| Article en page(s) : |
p. 213-218 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Adsorption
Biosorbant
Caractérisation
Chimie analytique
Chrome hexavalent
Eaux usées -- Epuration
Maïs et constituants
Paille
|
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
Modified corn straw, MCS, was prepared by pretreatment and esterification modification technology. The optimisation and mechanism of Cr(VI) adsorption performance was critically investigated via orthogonal experimental design and single-factor comparison experiments. Experimental results indicated that the MCS dosage and pH value had the greatest effect on the Cr(VI) adsorption process. Moreover, the Cr(VI) adsorption rate (CrAR) and maximum adsorption capacity (CrAC) were 96.8 % and 121mg/g respectively under the optimal condition (MCS dosage : 0.04g, adsorption time: 45 minutes, pH3, adsorption temperature: 40°C, Cr(VI) initial concentration : 10mg/L), which was an increase of 10.3 times compared to unmodified corn straw. FTIR analysis testified that carboxyl and ester groups were introduced into the MCS. Meanwhile, it turned out that the cellulose structure ctf MCS was found to be more orderly by SEM analysis than that of CS. The MCS might show great potentiel for application in the adsorption of Cr(VI) in tannery wastewater as a new type of biosorbent. |
| Note de contenu : |
- EXPERIMENTAL PROCEDURES : Materials - Preparation of modified corn stalk (MCS) - Adsorption tests of Cr(VI) by MCS - Characterisation
- RESULTS AND DISCUSSION : Orthogonal experiment results - Influence of MCS dosage on Cr(VI) adsorption - Influence of pH on Cr(VI) adsorption - Influence of temperature on Cr(VI) adsorption - SEM analysis - FTIR analysis |
| En ligne : |
https://drive.google.com/file/d/1_QV07J2Xpn1E49OcWjF4xdTICk767T2s/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32802 |
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 103, N° 4 (07-08/2019) . - p. 213-218
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Preparation and application of modified corn straw as a biosorbent for Cr(VI) adsorption in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 103, N° 4 (07-08/2019)
