Uptake of dyes by a promising locally available agricultural solid waste: coir pith

Citation
C. Namasivayam et al., Uptake of dyes by a promising locally available agricultural solid waste: coir pith, WASTE MAN, 21(4), 2001, pp. 381-387
Citations number
17
Categorie Soggetti
Environmental Engineering & Energy
Journal title
WASTE MANAGEMENT
ISSN journal
0956053X → ACNP
Volume
21
Issue
4
Year of publication
2001
Pages
381 - 387
Database
ISI
SICI code
0956-053X(2001)21:4<381:UODBAP>2.0.ZU;2-O
Abstract
The adsorption of rhodamine-B and acid violet by coir pith carbon was carri ed out by varying the parameters such as agitation time, dye concentration, adsorbent dose and pH. The adsorption followed both Langmuir and Freundlic h isotherms. The adsorption capacity was found to be 2.56 mg and 8.06 mg dy e per g of the adsorbent for rhodamine-B and acid violet, respectively. Ads orption of dyes followed first order rate kinetics. Acidic pH was favorable for the adsorption of acid violet and alkaline pH was favorable to rhodami ne-B. Desorption studies showed that alkaline pH was favorable fur the deso rption of acid violet and acidic pH was favorable for the desorption of rho damine-B. (C) 2001 Elsevier Science Ltd. All rights reserved.