Equilibrium and kinetic studies of copper(II) removal by three species of dead fungal biomasses

Li, Xiaona; Xu, Q.; Han, Guomin; Zhu, Wenxu; Chen, Zhanhui; He, Xueli; Tian, Xingjun

doi:10.1016/j.jhazmat.2008.10.013

Cited by 41 publications

(15 citation statements)

References 51 publications

(67 reference statements)

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“…The Langmuir and Freundlich models were used to describe the biosorption equilibrium [19]. The linearized Langmuir isotherm allows the calculation of the maximum adsorption capacity and Langmuir constant and was presented by the following equation:…”

Section: Equilibrium Modellingmentioning

confidence: 99%

Biosorption of Pb(II) ions from aqueous solutions by waste biomass ofStreptomyces fradiaepretreated with NaOH

Kirova

Velkova

Stoytcheva

et al. 2015

Biotechnology & Biotechnological Equipment

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Biosorption of Pb(II) ions from a model solution was investigated using Streptomyces fradiae biomass as biosorbent pretreated with sodium hydroxide. The mycelium is a waste product from the biotechnological production of the macrolide antibiotic tylosin in the pharmaceutical industry. The biosorption study was conducted in a batch system with respect to initial pH, initial metal concentration and contact time. For a description of the biosorption equilibrium, Langmuir and Freundlich adsorption models were used. Equilibrium data fitted better to the Langmuir model and the calculated maximum biosorption capacity was 138.88 mg¢g ¡1 at initial pH 5.0, contact time of 120 min, biosorbent dose of 1 g¢dm ¡3and concentration range for the Pb(II) ions from 10 to 200 mg¢dm ¡3 . Pseudo-first and pseudo-second order kinetic models were applied to the experimental data. The results indicated that the Pb(II) uptake process followed the Ho equation. The interference of co-present ions Cu(II) and Zn(II) on the Pb(II) biosorption was also studied. It was determined that at the highest Pb(II) concentration (200 mg¢dm ¡3 ) Cu(II) and Zn(II) caused 27.22% and 24.88% decreasing in Pb(II) uptake, respectively. The obtained results could be useful in prospective applications of chemically modified waste mycelium of S. fradiae as an alternative biosorbent for Pb(II) removal from aqueous solutions.

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Section: Equilibrium Modellingmentioning

confidence: 99%

Biosorption of Pb(II) ions from aqueous solutions by waste biomass ofStreptomyces fradiaepretreated with NaOH

Kirova

Velkova

Stoytcheva

et al. 2015

Biotechnology & Biotechnological Equipment

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“…This indicates that the adsorption occurs until a monolayer of adsorption is completed and after completion of adsorption, no more interaction between the adsorbent and adsorbate molecules takes place (Li et al, 2009). It was adapted to model isotherms and to calculate the bentazon adsorption capacities of the produced carbons.…”

Section: Adsorption Isothermsmentioning

confidence: 99%

Henna wood as an adsorptive material for bentazon

Mounaouer¹,

Wali²,

Fourti³

et al. 2014

Afr. J. Biotechnol.

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In this study, the efficiency of activated carbon produced from Henna wood was studied to remove herbicide from aqueous solutions by adsorption. The parameters that affect the adsorption such as contact time, activated carbon dosage, initial concentration of adsorbate, stirring rate, temperature, and pH on bentazon adsorption were studied. The use of Henna wood as a raw material to produce activated carbon by physical activation was investigated. The activated carbons produced were characterized by nitrogen adsorption isotherms and point of zero charge properties. Brunauer, Emmett and Teller (BET) surface area of the activated carbon was determined. The removal of herbicide from aqueous solutions by adsorption on activated carbon produced was studied. The results of the present investigation showed that activated carbons prepared from Henna wood have good adsorption capacity for the removal of bentazon from aqueous solution. The Langmuir model provides the best correlation of the experimental equilibrium data. Adsorption isotherm according to BET classification was of Type I. The adsorption isotherms of bentazon revealed that adsorption increased as the concentration increases up to a saturation point. Enthalpy, entropy and free enthalpy adsorption have a negative value indicating that the adsorption of bentazon on the Henna wood activated was feasible, spontaneous and exothermic at 20 to 40°C.

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“…This indicates that the adsorption occurs until a monolayer of adsorption is completed and after completion of adsorption no more interaction between the adsorbent and adsorbate molecules takes place [44]. The Langmuir isotherm is expressed as,…”

Section: Langmuir Isothermmentioning

confidence: 99%

Adsorptive removal of hazardous anionic dye “Congo red” from wastewater using waste materials and recovery by desorption

Mittal

Malviya

et al. 2009

Journal of Colloid and Interface Science

654

210

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a b s t r a c tThe present investigation assesses the applicability of waste materials-bottom ash and deoiled soya-for the removal of the colorant Congo red from wastewaters. The adsorption characteristics and dye removal efficiency of adsorbents have been determined by investigating factors such as effect of pH, effect of concentration of the dye, amount of adsorbents, contact time, and temperature. Langmuir, Freundlich, Tempkin, and Dubinin-Radushkevich isotherm models have been used to evaluate the ongoing adsorption. With the help of adsorption isotherm data different thermodynamic parameters such as free energy; enthalpy, and entropy have been calculated. The estimated free energy has been obtained as À21.52 kJ mol À1 for bottom ash and À16.88 kJ mol À1 for deoiled soya. On the basis of pseudo-first-order and pseudo-second-order kinetic equations different kinetic parameters have been obtained. Column operations depicted good adsorptive tendencies for Congo red with 96.95% and 97.14% saturation of dye on bottom ash and deoiled soya, respectively. Regeneration of the saturated columns has been made by eluting NaOH solution and more than 90% dye has been recovered in both cases.

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Equilibrium and kinetic studies of copper(II) removal by three species of dead fungal biomasses

Cited by 41 publications

References 51 publications

Biosorption of Pb(II) ions from aqueous solutions by waste biomass ofStreptomyces fradiaepretreated with NaOH

Biosorption of Pb(II) ions from aqueous solutions by waste biomass ofStreptomyces fradiaepretreated with NaOH

Henna wood as an adsorptive material for bentazon

Adsorptive removal of hazardous anionic dye “Congo red” from wastewater using waste materials and recovery by desorption

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