Characterization of Fe(III) Adsorption onto Zeolite and Bentonite

Bakalár, Tomáš; Kaňuchová, Mária; Girová, Anna; Pavolová, Henrieta; Hromada, R.; Hajduová, Zuzana

doi:10.3390/ijerph17165718

Cited by 18 publications

(10 citation statements)

References 39 publications

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“…The particle size distributions of both Z-M20 and Z-M50 are normal (Gaussian) distributions though the particle size is different. The particle size and its distribution may affect the sorption process and the amount of adsorbed Cu and Zn [43].…”

Section: Resultsmentioning

confidence: 99%

“…Based on the regression analysis and fit in the graphics, the experimental data are fit by Lagmuir isotherm the most accurately for sorption of Cu from both CuSO 4 and Cu(NO 3 ) 2 onto both Z-M20 and Z-M50. It presumes that the Cu ions are adsorbed on a fixed number of sites on the zeolites, each site is occupied by one adsorbed ion, all the sites are energetically equivalent, the sorption is monolayer, and the adsorbed molecules do not interact [43,44]. The most accurate fit is also by Langmuir isotherm for sorption of Zn from ZnSO 4 onto both Z-M20 and Z-M50, which means that the sorption process assumes the same features as the Cu sorption onto the zeolites.…”

Section: Compound (Wt%) Z-m20 Z-m50 Z-m20 * Cuso4 Cu(no3)2 Znso4 Zn(n...mentioning

confidence: 99%

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Characterization of Cu(II) and Zn(II) Sorption onto Zeolite

et al. 2022

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In this study, a batch sorption study approach was combined with an instrumental analytical approach of atomic absorption spectroscopy, X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) for the sorption of copper and zinc ions from aqueous solution on zeolites. Both copper and zinc are biogenic elements; nevertheless, many industrial processes produce an excessive amount, which is why their efficient removal from water must be studied. Two types of zeolites, Zeolite Micro 20 (Z-M20) and Zeolite Micro 50 (Z-M50), were used. The results showed that the maximum sorption capacities for removal of Cu and Zn were 1.06 for CuSO4, 42.35 for Cu(NO3)2, 1.15 for ZnSO4 and 2.29 for Zn(NO3)2 adsorption onto Z-M20 and 0.45 for CuSO4,1.67 for Cu(NO3)2, 0.39 for ZnSO4 and 1.51 for Zn(NO3)2 adsorption onto Z-M50. The maximum sorption capacities are higher for sulfates and the sorbent with smaller particle size. The sorption capacities of Cu and Zn for corresponding anion and particle size differ only up to 5–15%. Using XRD and XPS analyses before and after the sorption process, it was found that the content of both Cu and Zn in the surface layer and the bulk are the same for sorption onto sorbent with smaller particle size, but are higher in the surface layer than in the bulk for sorption onto sorbent with larger particle size. One of the main findings of this study is that a zeolite with smaller particles takes Cu and Zn by the whole particle, while with bigger particles, Cu and Zn concentrate in the surface of the particle. The results of the study may be used as an indicator for sorption efficiency of the studied zeolites for their application in the treatment of copper and zinc contaminated effluents.

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Section: Resultsmentioning

confidence: 99%

Section: Compound (Wt%) Z-m20 Z-m50 Z-m20 * Cuso4 Cu(no3)2 Znso4 Zn(n...mentioning

confidence: 99%

Characterization of Cu(II) and Zn(II) Sorption onto Zeolite

et al. 2022

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“…16 To eliminate heavy metals and inorganic contaminants, clay minerals and agricultural wastes are utilized. 17 Natural and efficient adsorbents include clay minerals. [18][19][20] The removing of heavy metals from aquatic environments has relied heavily on the efficiency of clay as an adsorbent material.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of mercury (II) ions on kaolinite from aqueous solutions: Isothermal, kinetic, and thermodynamic studies

Altunkaynak,

Canpolat,

Yavuz

2023

Env Prog and Sustain Energy

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Due to industrial activity, heavy metal contamination is present in water, air, and soil around the world. Due to this circumstance, serious environmental issues arise. Natural kaolin (NK) clay underwent batch processing to remove Hg2+. Scanner electron microscopy (SEM), energy dispersion spectroscopy (EDS), x‐ray diffraction (XRD), and Brunauer–Emmett–Teller (BET) were used to analyze the morphological and chemical characteristics of kaolin. Investigations were done into how adsorption is impacted by contact duration, adsorbent dosage, temperature, and solution pH. Kaolin's BET surface area was found to be 8.085 m2/g, while its pore volume was found to be 0.0537 cm3/g. The best working conditions were found to be pH 6.81 and an equilibrium period of 90 min. It was discovered that the Langmuir isotherm model was the most suitable one. At 298, 308, and 318 K, respectively, the adsorption capacities of NK were calculated to be 10.964, 10.515, and 10.101 mg/g. The pseudo‐second‐order kinetic model agreed with this. It was revealed that NK had a maximum desorption efficiency of 91.36%. Through this process, the potential of NK as an eco‐friendly adsorbent for heavy metal removal was shown.

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“…Bentonite has several advantageous properties as an adsorbent, including low cost, good selectivity, and ion exchange capacity and regenerability [ 17 , 18 ]. Bentonite is used for adsorption of Li [ 19 ], Cs [ 20 ], Fe(III) [ 21 ], Cd(II), Zn(II) [ 22 ], Cu(II), Pb(II), and Ni(II) [ 23 ]. The adsorption of Ni(II) was studied on Slovak bentonites [ 24 , 25 ], Iranian bentonites [ 26 ], nano-bentonites [ 27 ], fungal dead biomass composites with bentonite [ 28 ], hybridized bentonites [ 29 ], and other materials.…”

Section: Introductionmentioning

confidence: 99%

Removal of Nickel from Aqueous Solutions by Natural Bentonites from Slovakia

et al. 2021

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In this study, the removal of nickel (Ni(II)) by adsorption from synthetically prepared solutions using natural bentonites (Lieskovec (L), Hliník nad Hronom (S), Jelšový Potok (JP), and Stará Kremnička (SK)) was investigated. All experiments were carried out under batch processing conditions, with the concentration of Ni(II), temperature, and time as the variables. The adsorption process was fast, approaching equilibrium within 30 min. The Langmuir maximum adsorption capacities of the four bentonite samples used were found to be 8.41, 12.24, 21.79, and 21.93 mg g–1, respectively. The results best fitted the pseudo-second-order kinetic model, with constant rates in a range of 0.0948–0.3153 g mg–1 min. The effect of temperature was investigated at temperatures of 20, 30, and 40 °C. Thermodynamic parameters, including standard enthalpy (ΔH0), Gibbs energy (ΔG0), and standard entropy (ΔS0), were calculated. The adsorption of Ni(II) by bentonite samples was an endothermic and spontaneous process. These results indicated that, of the bentonite samples used, the natural bentonites from JP and SK were most suitable for the removal of nickel from synthetically prepared solutions.

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Characterization of Fe(III) Adsorption onto Zeolite and Bentonite

Cited by 18 publications

References 39 publications

Characterization of Cu(II) and Zn(II) Sorption onto Zeolite

Characterization of Cu(II) and Zn(II) Sorption onto Zeolite

Adsorption of mercury (II) ions on kaolinite from aqueous solutions: Isothermal, kinetic, and thermodynamic studies

Removal of Nickel from Aqueous Solutions by Natural Bentonites from Slovakia

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