Feasibility of metal adsorption using brown algae and fungi: Effect of biosorbents structure on adsorption isotherm and kinetics

Negm, Nabel A.; Wahed, M. G. Abd El; Hassan, Abdel Rahman A.; Kana, Maram T.H. Abou

doi:10.1016/j.molliq.2018.05.027

Cited by 82 publications

(27 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The interpretation of important information is possible via the parameters attained from the adsorption isotherm equations. In studying adsorption isotherm, the main output describes the way in which adsorbed molecules are distributed at the adsorbent interfaces . The best fit isotherm model is determined owing to the highest coefficient of determination (R 2 ).…”

Section: Resultsmentioning

confidence: 99%

Optimizing adsorptive removal of malachite green and methyl orange dyes from simulated wastewater by Mn‐doped CuO‐Nanoparticles loaded on activated carbon using CCD‐RSM: Mechanism, regeneration, isotherm, kinetic, and thermodynamic studies

Sharifpour

Dil

Asfaram

et al. 2019

Applied Organom Chemis

107

View full text Add to dashboard Cite

In the present work, Mn‐doped CuO‐NPs‐AC was prepared by a simple method, characterized using various techniques such as FESEM, EDX, XRD, PSD, and pHpzc and finally used for the adsorption of malachite green (MG) and methyl orange (MO) in a number of single and binary solutions. A series of adsorption experiments were conducted to investigate and optimize the influence of various factors (such as different pH, concentration of MG and MO, adsorbent mass, and sonication time) on the simultaneous adsorption of MG and MO using response surface methodology. Under optimal conditions of pH 10, adsorbent dose of 0.02 g, MG concentration of 30 mg L−1, MO concentration of 30 mg L−1, and sonication time of 4.5 min at room temperature, the maximum predicted adsorption was observed to be 100.0%, for both MG and MO, showing that there is a favorable harmony between the experimental data and model predictions. The adsorption isotherm of MO and MG by Mn‐doped CuO‐NPs‐AC could be well clarified by the Langmuir model with maximum adsorption capacity of 320.69 mg g−1 and 290.11 mg g−1 in the single solution and 233.02 mg g−1 and 205.53 mg g−1 in the binary solution by 0.005 g of adsorbent mass for MG and MO, respectively. Kinetic studies also revealed that both MG and MO adsorption were better defined by the pseudo‐second order model for both solutions. In addition, the thermodynamic constant studies disclosed that the adsorption of MG and MO was likely to be influenced by a physisorption mechanism. Eventually, the reusability of the Mn‐doped CuO‐NPs‐AC after six times showed a reduction in the adsorption percentage of MG and MO.

show abstract

Section: Resultsmentioning

confidence: 99%

Optimizing adsorptive removal of malachite green and methyl orange dyes from simulated wastewater by Mn‐doped CuO‐Nanoparticles loaded on activated carbon using CCD‐RSM: Mechanism, regeneration, isotherm, kinetic, and thermodynamic studies

Sharifpour

Dil

Asfaram

et al. 2019

Applied Organom Chemis

107

View full text Add to dashboard Cite

show abstract

“…This effect is likely to be caused by metal ions hindering each other during the adsorption process in multi-component systems. The mathematical models considered to best describe biosorption phenomena, are the Langmuir and Freundlich isotherms [20,21]. The Langmuir isotherm is based on three basic theoretical assumptions:…”

Section: Biosorption Isothermmentioning

confidence: 99%

Simultaneous biosorption of nickel and cadmium by the brown algae Cystoseria indica characterized by isotherm and kinetic models

et al. 2019

View full text Add to dashboard Cite

Biosorption is an effective way of extracting heavy metal ions from aqueous solutions of various compositions. The brown algae, Cystoseria indica, when treated with sodium chloride, demonstrates significant capacity to extract cadmium and nickel, simultaneously, from aqueous solutions. The batch system was running over wide ranges of initial metal ion concentrations (5-150 mg/L), pH (2-6), adsorbent mass (1-4 g/L), and contact times (20-300 min), at a temperature of 25 °C. The results obtained when applying the system in these conditions exhibit higher removal capacities for cadmium than nickel. The optimal conditions of the biosorption process were found as the adsorbent mass of 1 g/L, initial concentration of adsorbates of 100 mg/L and pH of 6. The equilibrium data obtained are better described by the extended-Freundlich isotherm for nickel and cadmium. The maximum biosorption of nickel and cadmium in binary-metal-component system were 18.17 and 55.34 mg/g, respectively. The kinetic data derived from these experiments were evaluated with pseudo-first-order, pseudo-second-order and intra-particle-diffusion kinetic models. Kinetic examination of the equilibrium data derived from these models suggest that the adsorption of nickel and cadmium both follow the intra-particle-diffusion kinetic model.

show abstract

“…The regression coefficient (R 2 ) is 0.86. Therefore, the low values of R 2 and negative slope of log q e − q t vs. t indicate the inadequacy of the pseudofirst-order model to describe interaction among Al 2 O 3 / Pd(NO 3 ) 2 /zeolite molecules [50]. 5log q e − q t = logq e − K ad 2.303 t…”

Section: Pseudo-first-order Kineticmentioning

confidence: 99%

Investigation of carbon monoxide gas adsorption on the Al2O3/Pd(NO3)2/zeolite composite film

et al. 2019

View full text Add to dashboard Cite

In this study, Al 2 O 3 /Pd(NO 3) 2 /zeolite composite films have been fabricated by roll coating method and characterized by X-ray diffraction, energy-dispersive X-ray spectroscopy and field emission scanning electron microscopy. The gas adsorption was tested in an experimental setup by a continuous gas analyzer KIMO KIGAZ 210 at constant temperature and pressure (32 °C and 1.5 bar) and as a function of reaction time (s). The inlet CO gas concentration was 150 mg L −1 , and the saturation level of CO gas concentration was 5 mg L −1. The maximum adsorption capacity (q max) and maximum adsorption efficiency (%) were calculated as 111.16 mg g −1 and 97%, respectively. Pseudo-first-order, pseudo-second-order, and intra-particle diffusion models were investigated to kinetic study of CO adsorption on Al 2 O 3 /Pd(NO 3) 2 /zeolite adsorbents. Results indicated that CO adsorption follows the pseudo-second-order model well according to regression coefficient value (R 2 = 0.98), and the value of pseudo-second-order rate constant of adsorption was obtained as 2 × 10 −5 g mg −1 s −1. According to the intra-particle diffusion model, adsorption is affected by only one process. So, adsorption of CO by Al 2 O 3 /Pd(NO 3) 2 /zeolite adsorbent indicated an effective adsorption by obtained results.

show abstract

Feasibility of metal adsorption using brown algae and fungi: Effect of biosorbents structure on adsorption isotherm and kinetics

Cited by 82 publications

References 35 publications

Optimizing adsorptive removal of malachite green and methyl orange dyes from simulated wastewater by Mn‐doped CuO‐Nanoparticles loaded on activated carbon using CCD‐RSM: Mechanism, regeneration, isotherm, kinetic, and thermodynamic studies

Optimizing adsorptive removal of malachite green and methyl orange dyes from simulated wastewater by Mn‐doped CuO‐Nanoparticles loaded on activated carbon using CCD‐RSM: Mechanism, regeneration, isotherm, kinetic, and thermodynamic studies

Simultaneous biosorption of nickel and cadmium by the brown algae Cystoseria indica characterized by isotherm and kinetic models

Investigation of carbon monoxide gas adsorption on the Al2O3/Pd(NO3)2/zeolite composite film

Contact Info

Product

Resources

About