Basic dyes removal from wastewater by adsorption on rice husk carbon

Citation
Dk. Singh et B. Srivastava, Basic dyes removal from wastewater by adsorption on rice husk carbon, I J CHEM T, 8(2), 2001, pp. 133-139
Citations number
23
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Chemical Engineering
Journal title
INDIAN JOURNAL OF CHEMICAL TECHNOLOGY
ISSN journal
0971-457X → ACNP
Volume
8
Issue
2
Year of publication
2001
Pages
133 - 139
Database
ISI
SICI code
0971-457X(200103)8:2<133:BDRFWB>2.0.ZU;2-O
Abstract
Rice husk carbon (RHC) has been prepared from rice husk impregnated with 50 % H3PO4 and carbonised at 300 degreesC. Its adsorption capacity has been te sted for the decolourization of wastewater containing safranine and methyle ne blue. The effect of system variables such as concentration, temperature, pH, contact time, adsorbent dosage and particle size are investigated. Rem oval of dye has been found to increase with increase in dye concentration a nd pH of the solution. Kinetics of removal has been found to follow the fir st order rate expression. The adsorption isotherm data fitted both Freundli ch and Langmuir adsorption isotherms. Thermodynamic studies show the adsorp tion to be an exothermic and spontaneous.