Kinetic, Isotherm and Thermodynamic Aspects of Zn2+ Biosorption by Spirulina platensis: Optimization of Process Variables by Response Surface Methodology

Alharbi, Nada K.; Al-Zaban, Mayasar I.; Albarakaty, Fawziah M.; Abdelwahab, Sayed F.; Hassan, Sedky H.A.; Fawzy, Mustafa A.

doi:10.3390/life12040585

Cited by 16 publications

(8 citation statements)

References 62 publications

(76 reference statements)

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“…The ANOVA findings also demonstrated that the biosorbent dose was significant and had a positive influence on the efficiency of copper removal ( p = 0.0003; Table 3 ) in linear term. The number of active binding sites for the biosorption process is determined by the biosorbent dose 26 . As the biosorbent dose was increased, the number of binding sites on the surface of R. damascena leaves rises, resulting in a higher percentage of copper removal 26 .…”

Section: Resultsmentioning

confidence: 99%

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Statistical optimization, kinetic, equilibrium isotherm and thermodynamic studies of copper biosorption onto Rosa damascena leaves as a low-cost biosorbent

Fawzy

Al-Yasi

Galal

et al. 2022

Sci Rep

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In this study, Rosa damascena leaf powder was evaluated as a biosorbent for the removal of copper from aqueous solutions. Process variables such as the biosorbent dose, pH, and initial copper concentration were optimized using response surface methodology. A quadratic model was established to relate the factors to the response based on the Box–Behnken design. Analysis of variance (ANOVA) was used to assess the experimental data, and multiple regression analysis was used to fit it to a second-order polynomial equation. A biosorbent dose of 4.0 g/L, pH of 5.5, and initial copper concentration of 55 mg/L were determined to be the best conditions for copper removal. The removal of Cu2+ ions was 88.7% under these optimal conditions, indicating that the experimental data and model predictions were in good agreement. The biosorption data were well fitted to the pseudo-second-order and Elovich kinetic models. The combination of film and intra-particle diffusion was found to influence Cu2+ biosorption. The Langmuir and Dubinin–Radushkevich isotherm models best fit the experimental data, showing a monolayer isotherm with a qmax value of 25.13 mg/g obtained under optimal conditions. The thermodynamic parameters showed the spontaneity, feasibility and endothermic nature of adsorption. Scanning electron microscopy, energy-dispersive X-ray spectroscopy, and Fourier transform infrared spectroscopy were used to characterize the biosorbent before and after Cu2+ biosorption, revealing its outstanding structural characteristics and high surface functional group availability. In addition, immobilized R. damascena leaves adsorbed 90.7% of the copper from aqueous solution, which is more than the amount adsorbed by the free biosorbent (85.3%). The main mechanism of interaction between R. damascena biomass and Cu2+ ions is controlled by both ion exchange and hydrogen bond formation. It can be concluded that R. damascena can be employed as a low-cost biosorbent to remove heavy metals from aqueous solutions.

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Section: Resultsmentioning

confidence: 99%

“…The number of active binding sites for the biosorption process is determined by the biosorbent dose 26 . As the biosorbent dose was increased, the number of binding sites on the surface of R. damascena leaves rises, resulting in a higher percentage of copper removal 26 . The elimination of copper by R. damascena leaves is also pH-dependent.…”

Section: Resultsmentioning

confidence: 99%

Statistical optimization, kinetic, equilibrium isotherm and thermodynamic studies of copper biosorption onto Rosa damascena leaves as a low-cost biosorbent

Fawzy

Al-Yasi

Galal

et al. 2022

Sci Rep

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“…Computer-assisted data analysis packages are increasingly being used for statistical data processing [ 18 , 19 , 24 , 25 ]. The advantage of this software is that it allows for much more efficient work processing, which leads to significant time savings and helps in obtaining more in-depth information on data, which might otherwise be lost.…”

Section: Methodsmentioning

confidence: 99%

“…Statistical analysis and optimization are commonly used in adsorption studies for mathematical process modelling and optimizing performance. Thus, the previously reported processes include the following: removal of Cr(VI) from the aqueous solutions via teff straw-based activated carbon [ 15 ]; biosorption of Acid Yellow and Acid Blue onto biomass obtained from brewery industrial waste/ spent brewery grains [ 16 ]; Cu 2+ biosorption using Oenococcus oeni PSU1 [ 17 ]; Zn 2+ biosorption using Spirilina platensis [ 18 ]; Cd 2+ biosorption using Turbinaria ornata [ 12 ]; and Methylene Blue onto de-oiled algal biomass [ 19 ], among others. In this study, the removal of a reference model of reactive azo dye (Brilliant Red HE-3B) from aqueous colored solutions onto a newly prepared biosorbent, based on a residual immobilized biomass (with residual Saccharomyces pastorianus byproducts), is reported.…”

Section: Introductionmentioning

confidence: 99%

Statistical Analysis and Optimization of the Brilliant Red HE-3B Dye Biosorption onto a Biosorbent Based on Residual Biomass

et al. 2022

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Using various techniques, natural polymers can be successfully used as a matrix to immobilize a residual microbial biomass in a form that is easy to handle, namely biosorbents, and which is capable of retaining chemical species from polluted aqueous media. The biosorption process of reactive Brilliant Red HE-3B dye on a new type of biosorbent, based on a residual microbial biomass of Saccharomyces pastorianus immobilized in sodium alginate, was studied using mathematical modeling of experimental data obtained under certain conditions. Different methods, such as computer-assisted statistical analysis, were applied, considering all independent and dependent variables involved in the reactive dye biosorption process. The optimal values achieved were compared, and the experimental data supported the possibility of using the immobilized residual biomass as a biosorbent for the studied reference dye. The results were sufficient to perform dye removals higher than 70–85% in an aqueous solution containing around 45–50 mg/L of reactive dye, and working with more than 20–22 g/L of prepared immobilized microbial biosorbent for more than 9.5–10 h. Furthermore, the proposed models agreed with the experimental data and permitted the prediction of the dye biosorption behavior in the experimental variation field of each independent variable.

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“…Spirulina platensis has different functional groups, such as hydroxyl, carboxyl, phosphate, and sulfate [ 30 ], that can bind REEs. Spirulina platensis has been used as a biosorbent for removing organic molecules [ 27 , 28 , 29 , 30 ] and heavy metals [ 31 , 32 , 33 ]. Although REEs have been uptaken utilizing biosorbents, up to the best of our knowledge, this paper is the first to report the Nd uptake using Spirulina platensis (blue-green microalgae).…”

Section: Introductionmentioning

confidence: 99%

Biosorption of Neodymium (Nd) from Aqueous Solutions Using Spirulina platensis sp. Strains

et al. 2022

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Rare earth elements such as neodymium (Nd) are important elements used mainly in developing new technologies. Although they are found in low concentrations in nature, they can be obtained by extracting solid samples such as phosphogypsum. Among the techniques, adsorption has been used successfully with several adsorbent materials. In this work, two strains of Spirulina platensis (LEB-18 and LEB-52) were employed as biosorbents for efficiently removing the Nd element from the aqueous media. Biosorption tests were carried out in a batch system, and the results of the biosorption kinetics showed that for both materials, the biosorption of Nd was better described by the Avrami model. Moreover, it could be considered that 80 min would be necessary to attain the equilibrium of Nd(III) using both biosorbents. The result of the biosorption isotherms showed that for both strains, the best-fitted model was the Liu model, having a maximum biosorption capacity of 72.5 mg g−1 for LEB-18 and 48.2 mg g−1 for LEB-52 at a temperature of 298 K. Thermodynamics of adsorption showed that for both LEB-18 and LEB-52 the process was favorable (∆G° < 0) and exothermic (∆H° −23.2 for LEB-18 and ∆H° −19.9 for LEB-52). Finally, both strains were suitable to uptake Nd, and the better result of LEB-18 could be attributed to the high amount of P and S groups in this biomass. Based on the results, a mechanism of electrostatic attraction of Nd3+ and phosphate and sulfate groups of both strains of Spirulina platensis was proposed.

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Kinetic, Isotherm and Thermodynamic Aspects of Zn2+ Biosorption by Spirulina platensis: Optimization of Process Variables by Response Surface Methodology

Cited by 16 publications

References 62 publications

Statistical optimization, kinetic, equilibrium isotherm and thermodynamic studies of copper biosorption onto Rosa damascena leaves as a low-cost biosorbent

Statistical optimization, kinetic, equilibrium isotherm and thermodynamic studies of copper biosorption onto Rosa damascena leaves as a low-cost biosorbent

Statistical Analysis and Optimization of the Brilliant Red HE-3B Dye Biosorption onto a Biosorbent Based on Residual Biomass

Biosorption of Neodymium (Nd) from Aqueous Solutions Using Spirulina platensis sp. Strains

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