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Thermodynamics and kinetic studies of biosorption of a basic dye from aqueous solution using green algae Ulothrix sp
Thermodynamics and kinetic studies of biosorption of a basic dye from aqueous solution using green algae Ulothrix sp
- Source :
- Colloids and Surfaces B: Biointerfaces. 76:279-285
- Publication Year :
- 2010
- Publisher :
- Elsevier BV, 2010.
-
Abstract
- This study addresses removal of a basic dye, methylene blue, from aqueous Solutions by using dried Ulothrix sp. biomass as biosorbent. The effects of the initial dye concentration, contact time. temperature, solution equilibrium pH, biosorbent dosage, and mixing rate on biosorption of the dye have been investigated. It was found that 30 min is sufficient in order to reach adsorption equilibrium. The amount of methylene blue adsorbed onto Ulothrix sp. increased with increasing equilibrium pH and mixing rate, in contrary, it decreased with increasing temperature and sorbent dosage. The process followed the pseudo-second-order kinetic model. The isosteric enthalpy and entropy values were calculated as -11.8 kJ/mol and 37.5 J/(mol K). respectively. In addition, the results suggest that the physical interactions between sorbent particles and sorbate ions play an important role for the adsorption of methylene blue onto the biosorbent. (C) 2009 Elsevier B.V. All rights reserved.
- Subjects :
- Ulothrix
Basic dyes
chemistry.chemical_compound
Isosteric enthalpy
Colloid and Surface Chemistry
Biosorption mechanism
Chlorophyta
Dye removal
green alga
Kinetic theory
Coloring Agents
Mixing rates
Algae, Green
reaction time
Aqueous solution
Molecular Structure
biology
Sorption kinetics
Contact time
article
Surfaces and Interfaces
General Medicine
Solutions
pH effects
priority journal
Thermodynamics
Pseudo-second-order kinetic models
Entropy value
temperature measurement
Methylene blue
biosorption
Biotechnology
Sorbent
Solution equilibrium
Algae
Sorbent particles
Enthalpy
Inorganic chemistry
Kinetics
concentration process
Absorption
Water Purification
Adsorption equilibria
Adsorption
Ulothrix sp
Methylene blue sorption
enthalpy
controlled study
Physical interactions
Physical and Theoretical Chemistry
Aqueous solutions
nonhuman
pH measurement
Biosorption
Water
biology.organism_classification
chemistry
Thermodynamics and kinetics
Initial dye concentration
molecular interaction
Sorbates
Biosorbents
aqueous solution
entropy
biomass conversion
Water Pollutants, Chemical
adsorption kinetics
Subjects
Details
- ISSN :
- 09277765
- Volume :
- 76
- Database :
- OpenAIRE
- Journal :
- Colloids and Surfaces B: Biointerfaces
- Accession number :
- edsair.doi.dedup.....ad857086b385e2f9e207a727860e1a84
- Full Text :
- https://doi.org/10.1016/j.colsurfb.2009.11.004