| Titre : |
Online spectrophotometric determination of Cr(III) and Cr(VI) in tannery wastewater by LPIC-FIA |
| Type de document : |
texte imprimé |
| Année de publication : |
2013 |
| Article en page(s) : |
p. 18-24 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Adsorption
Analyse par injection en flux continuL’analyse par injection en flux continu (Flow Injection Analysis FIA) consiste, dans son principe le plus simple, en l’injection d’un petit volume (µL) d’une solution échantillon dans un fluide en mouvement ; ce liquide transporteur, qui se déplace de façon continue, n’est pas segmenté, et la zone formée par l’injection répétée de l’échantillon est ainsi transportée vers un détecteur afin d’enregistrer les variations d’un paramètre physique ou physico-chimique caractéristique de l’échantillon ou, le plus souvent, de l’un de ses éléments constitutifs.
Bromure de cétyl-triméthyl-ammonium
Chromatographie
Chrome hexavalent
Chrome trivalent
Eaux usées -- Analyse
Salicyl fluorone
Séparation (technologie)
Spectrophotométrie
Tannage
|
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
A highly selective, low-cost and easily operated method has been developed for on-line separation and simultaneous determination of Cr(III) and Cr(VI) by using low pressure ion chromatography combined with flow injection spectrophotometric analysis (LPIC-FIA). Based on the selective adsorption of a low pressure ion chromatographic column (LPICC) on Cr(III), a new online separation system of (Cr(III) and Cr(VI) was proposed. Thus, the separated Cr(VI) and Cr(III) are successively reacted with salicylfluorone (SAF) to form an amaranthine complex in the presence of cetyltrimethylammonium bromide (CTMAB), respectively. The complex gave maximum absorbance at 570nm. All the variables were studied in order to optimize the reaction conditions. The calibration graphs were linear in the range of 10-1000µg L-1 (Cr(III) and 5-1000µg L-1 Cr(VI) was 2.36% (n=12) and 2.17%, respectively. The method was applied for the simultaneous determination of Cr(III) and Cr(VI) in tannery wastewater with satisfactory results and recoveries in the range of 95.8%-104.6% and 96.5%-104.6%, respectively. |
| Note de contenu : |
- EXPERIMENTAL PROCEDURE : Reagents and solutions - Apparatus and procedure - Synthesis of cross-linked starch microspheres (CSM)
- RESULTS AND DISCUSSION : Preliminary investigation- Effect of absorption spectra
- OPTIMIZATION OF VARIABLES : Choice of eluant -Effect of SAF, CTMAB and hexamethylene tetramine concentration - Effect of homothermic [constant temperature] heater length - Effect of temperature - Effect of sample injection volume - Analytical figures of merit - Interference study
- APPLICATION TO TANNERY WASTEWATER |
| En ligne : |
https://drive.google.com/file/d/1DuXH7LiZqd_myl1Z-DsALf1l-ZcbeSky/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17449 |
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 97, N° 1 (01-02/2013) . - p. 18-24
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