Determination of the reactive dye navy blue her in the wastewaters of the dyeing processes of chrome-tanned leather / L. S. P. Santos in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIX, N° 10 (10/2014)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CIX, N° 10 (10/2014) . - p. 330-341 Titre : Determination of the reactive dye navy blue her in the wastewaters of the dyeing processes of chrome-tanned leather Type de document : texte imprimé Auteurs : L. S. P. Santos, Auteur ; L. F. Crispim, Auteur ; N. M. C. Silva, Auteur ; N. S. Oliveira, Auteur Année de publication : 2014 Article en page(s) : p. 330-341 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Colorants réactifs Eaux usées -- Analyse Eaux usées -- Teneur en colorants Echantillonnage Etalonnage Spectrophotométrie UV-Visible Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : One of the main environmental problems in the leather industry is the contaminant load and amount of effluent produced during the industrial process. From these effluents we can highlight those resulting from the dyeing processes that contribute to the increase of the COD and BOD of the discharged wastewaters. The aim of the present work is to develop and validate simple, rapid, specific, selective, precise, robust and economical UV-Vis Spectrophotometric method for the estimation of reactive dye (Navy Blue Her) in aqueous solutions and effluents of the dyeing processes of chrome-tanned leather. UV-Vis Spectrophotometric measurement was carried out at a wavelength of maximum absorbance of 610 nm using ultrapure water as the solvent. The developed method was validated with respect to specificity, selectivity, sensitivity, limits of detection and quantification, linearity, precision (repeatability, intermediate precision) and robustness. The calibration curve (Abs = 0.01054C + 0.00067) is linear (r2 = 0.99998) in the concentration range from 3.0 mg/L up to 48.0 mg/L. The limit of detection (LOD) and the limit of quantification (LOQ) are 0.206 mg/L and 0.624 mg/L, respectively. The analysis results and its statistical treatment have proved that this analytical method is specific, selective, precise and robust, and has good repeatability and intermediate precision. Thus the proposed method was approved for all the analyzed parameters, being therefore, properly validated, and can be successfully applied for the estimation of reactive dye (Navy Blue Her) in aqueous solutions and effluents of the dyeing processes of chrome-tanned leather. Note de contenu : - EXPERIMENTAL : 1. Apparatus - 2. Materials and reagents - 3. Stock production preparation - 4. Standard solutions preparation - 5. Preparation of standard solutions to establish the calibration curve - 6. Preparation of real effluent samples - 7. Description of the experimental tests : a. UV-Vis spectrophotometric measurements - b. Calibration curve - 8. Validation of the method in study : a. Specificity and selectivity - b. Linearity and linear range - c. Precision - d. Stability of reactive dye solution - e. Robustness - RESULTS AND DISCUSSION : 1. Absorption spectra of the dye solutions and samples of real effluents - 2. Calibration cyrve - 3. Validation of the method in study : a. Specificity and selectivity - b. Sensitivity - c. Linearity and linear range - d. Limit of Detection (LOD) and limit of quantification (LOQ) - e. Measurement range - f. Precision - g. Stability of reactive dye solutions - h. Robustness - 4. Determination of the reactive dye concentration in samples of real effluents En ligne : https://drive.google.com/file/d/1VI8Z4XV89rWj5g0Q8u3NLqxnKYywFxGm/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22079 [article]

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