| Titre : |
Adsorption isotherm and kinetics of tannic acid on to carbonized chrome tanned leather solid waste |
| Type de document : |
texte imprimé |
| Auteurs : |
Rubina Chaudhary, Auteur ; Anupama Pati, Auteur |
| Année de publication : |
2017 |
| Article en page(s) : |
p. 198-206 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Absorbants et adsorbants
Carbonisation
Cinétique chimique
Cuirs et peaux -- Déchets
Déchets industriels -- Elimination
Isotherme d'adsorption
Solutions aqueuses (chimie)
Tanins
|
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
The disposal of chrome tanned leather shavings (CTLS) waste is a serious concern for the environment due to the presence of chromium. In this study, an attempt has been made to prepare adsorbent from CTLS through carbonization process. Carbonization of CTLS at temperature 600°C had provided surface area of 620 m2 g-1 and total pore volume of 0.49 cm3 g-1. The adsorption study is conducted by employing adsorbent prepared from CTLS on adsorbate tannic acid. The effects of various experimental parameters have been investigated using a batch adsorption technique to obtain information on treating wastewater containing tannic acid. The extent of tannic acid removal was studied by varying parameters such as pH, contact time, initial concentration of the tannic acid and amount of adsorbent. The removal efficiency of tannic acid in aqueous solution is found to be about 95%. The experimental equilibrium data for this system has been analyzed using the linearized forms of Langmuir and Freundlich isotherms. The Langmuir isotherm was found to provide the best theoretical correlation of the experimental data for the adsorption of tannic acid. The adsorption of tannic acid on adsorbent increased from 57 to 63 mg g-1, when the temperature was increased from 30 to 60°C. The adsorption was found to follow pseudo-second order kinetics. In short, this study provides a greener solution for CTLS and tannin containing wastewater. |
| Note de contenu : |
- EXPERIMENTAL : Materials - Preparation of carbonized (CTLS) - Preparation of aqueous solution of tannic acid as adsorbent - Adsorption studies - Isotherm studies - Adsorption kinetics
- RESULTS AND DISCUSSION : Characteristics of adsorbent - Effect of pH, initial concentration and treatment period on the removal of tannic acid - Adsorption isotherms - Adsorption kinetics |
| En ligne : |
https://drive.google.com/file/d/1Lftyao8lb93ahjiuqGy0Rs24kz2_QTyL/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28690 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXII, N° 6 (06/2017) . - p. 198-206
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Adsorption isotherm and kinetics of tannic acid on to carbonized chrome tanned leather solid waste in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXII, N° 6 (06/2017)
