Authors: Babu, B.V.; Gupta, Suresh

Source: Journal of Environmental Engineering and Science, Volume 7, Number 5, September 2008 , pp. 553-557(5)

Publisher: NRC Research Press

Abstract:

In the present study, an adsorbent was prepared from tamarind seeds and batch studies were conducted for Cr(VI) removal from aqueous solutions. Tamarind seeds were activated by heat treatment and with concentrated sulfuric acid (98% w/w). The parameters investigated include initial pH, contact time, initial Cr(VI) concentration, and adsorbent dosage. The adsorption of Cr(VI) was found to be maximum at low values of initial pH in the range of 1-3. The adsorption process of Cr(VI) was tested with Langmuir and Freundlich isotherm models. Application of the Langmuir isotherm to the systems yielded maximum adsorption capacity of 29.08 mg g^-1. The adsorption process followed second order kinetics and the corresponding rate constant was found to be 0.0026 g mg^-1 min^-1.

Dans la présente étude, un adsorbant a été préparé à partir de graines de tamarin et des études par lot ont été réalisées pour étudier l'élimination du Cr(VI) de solutions aqueuses. Les graines de tamarin ont été activées par un traitement thermique et de l'acide sulfurique concentré (98 % en poids). Les paramètres étudiés comprenaient le pH initial, le temps de contact, la concentration initiale en Cr(VI) ainsi que la dose d'adsorbant. L'adsorption du Cr(VI) s'est avérée maximale à de faibles valeurs de pH initial de l'ordre de 1-3. Le procédé d'adsorption du Cr(VI) a été vérifié en utilisant les équations isothermes de Langmuir et de Freundlich. L'utilisation de l'équation isotherme de Langmuir dans les systèmes a permis d'obtenir une capacité d'adsorption maximale de 29,08 mg·g^-1. Le processus d'adsorption suivait une cinétique du deuxième ordre et la constante de vitesse correspondante était de 0,0026 g·mg^-1·min^-1.

Document Type: Research article

Publication date: 2008-09-01

More about this publication?

• Since January 2002, NRC Research Press has published the Journal of Environmental Engineering and Science. During the seven-year history of the journal, the co-editors, Dr. Donald S. Mavinic and Dr. Daniel W. Smith, built a high-quality journal that was well respected by its community of researchers in Canada and around the world. The last issues of the Journal of Environmental Engineering and Science was published in November 2008 together with a supplement.

Related content

• In this: publication
• By this: publisher
• In this Subject: General & Civil Engineering ,  Hydraulic & Environmental Engineering
• By this author: Babu, B.V. ;  Gupta, Suresh

Website © Publishing Technology. Article copyright remains with the publisher, society or author(s) as specified within the article.

• Terms and conditions
• Privacy policy
• Information for advertisers