Thermodynamics and kinetic studies of biosorption of a basic dye from aqueous solution using green algae Ulothrix sp.
Küçük Resim Yok
Tarih
2010
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
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. © 2009 Elsevier B.V. All rights reserved.
Açıklama
Anahtar Kelimeler
Biosorption, Biosorption mechanism, Dye removal, Methylene blue, Sorption kinetics, Ulothrix sp., Adsorption equilibria, Aqueous solutions, Basic dyes, Biosorbents, Biosorption mechanism, Contact time, Dye removal, Entropy value, Green alga, Initial dye concentration, Isosteric enthalpy, Methylene blue, Methylene blue sorption, Mixing rates, Physical interactions, Pseudo-second-order kinetic models, Solution equilibrium, Sorbates, Sorbent particles, Thermodynamics and kinetics, Algae, Biosorption, Kinetic theory, pH effects, Solutions, Adsorption, methylene blue, adsorption kinetics, aqueous solution, article, biomass conversion, biosorption, concentration process, controlled study, enthalpy, entropy, green alga, molecular interaction, nonhuman, pH measurement, priority journal, reaction time, temperature measurement, thermodynamics, Absorption, Algae, Green, Coloring Agents, Kinetics, Methylene Blue, Molecular Structure, Solutions, Thermodynamics, Water, Water Pollutants, Chemical, Water Purification, Chlorophyta, Ulothrix, Biosorption, Biosorption mechanism, Dye removal, Methylene blue, Sorption kinetics, Ulothrix sp., Adsorption equilibria, Aqueous solutions, Basic dyes, Biosorbents, Biosorption mechanism, Contact time, Dye removal, Entropy value, Green alga, Initial dye concentration, Isosteric enthalpy, Methylene blue, Methylene blue sorption, Mixing rates, Physical interactions, Pseudo-second-order kinetic models, Solution equilibrium, Sorbates, Sorbent particles, Thermodynamics and kinetics, Algae, Biosorption, Kinetic theory, pH effects, Solutions, Adsorption, methylene blue, adsorption kinetics, aqueous solution, article, biomass conversion, biosorption, concentration process, controlled study, enthalpy, entropy, green alga, molecular interaction, nonhuman, pH measurement, priority journal, reaction time, temperature measurement, thermodynamics, Absorption, Algae, Green, Coloring Agents, Kinetics, Methylene Blue, Molecular Structure, Solutions, Thermodynamics, Water, Water Pollutants, Chemical, Water Purification, Chlorophyta, Ulothrix
Kaynak
Colloids and Surfaces B: Biointerfaces
WoS Q Değeri
Q2
Scopus Q Değeri
Q1
Cilt
76
Sayı
1
