Effect of temperatures and pH on methyl violet biosorption by Mansonia wood sawdust.

Abstract:

:In this study, the effect of temperature on the equilibrium biosorption of methyl violet dye from aqueous solution using Mansonia wood sawdust was studied. The equilibrium biosorption data were analyzed using three widely applied isotherm models; Langmuir, Freundlich and Redlich-Peterson isotherm. The fit of three linear Langmuir isotherm forms, the Freundlich isotherm, and the Redlich-Peterson isotherm were determined using linear and the non-linear methods. Langmuir isotherm parameters obtained from the three Langmuir linear equations by using linear method were dissimilar, except, when the non-linear method was used. Best fits were yielded with Langmuir and Redlich-Peterson isotherms. The methyl violet biosorption was strongly dependent solution pH and percentage dye removal became significant above pH 7, which was slightly higher than the pH(PZC) of the sawdust material. In addition, various thermodynamic parameters, such as DeltaG degrees , DeltaH degrees , and DeltaS degrees were calculated. Results suggested that the biosorption was a spontaneous and endothermic process.

journal_name

Bioresour Technol

journal_title

Bioresource technology

authors

Ofomaja AE,Ho YS

doi

10.1016/j.biortech.2007.11.018

subject

Has Abstract

pub_date

2008-09-01 00:00:00

pages

5411-7

issue

13

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(07)00952-2

journal_volume

99

pub_type

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