Characteristics of K+ and Nh4+ Adsorption and Desorption by Natural Bentonite and Zeolite Minerals Minerals

Falatah, A. M.; Sheta, A. S.; Sallam, Abdelazeem Sh.; Al-Sewailem, Mohamed

doi:10.21608/jssae.2005.226354

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“…Equations and indices for zinc adsorption according to Freundlich at 298 K. as the R 2 values for natural and synthetic zeolite, are higher in both soils. These results are consistent withFalatah et al (2005)…”

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confidence: 91%

“…An increase in the initial concentration of zinc resulted in an increase in the adsorbed quantity of zinc per gram of zeolite. This is mainly attributed to the high concentrations of zinc, which create a gradient in [20], who demonstrated that it is possible to describe adsorption with a high degree of accuracy using the Freundlich equation. Additionally, several researchers have used the Freundlich equation to describe adsorption experiments [21].…”

Section: Using the Freundlich Equation To Describe Zinc Adsorptionmentioning

confidence: 99%

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Adsorption Reaction and Kinetics of Zn on Zeolite Mineral Compared with Two Calcareous Soil

Al-Mashhdany,

Al-Hadethi

2023

IOP Conf. Ser.: Earth Environ. Sci.

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A laboratory experiment was conducted to study the adsorption of zinc element in eight concentrations (0, 25, 50, 100, 150, 200, 250 and 300 mg L-1) from its source ZnSO4.7H2O. Two repetitions were performed for each concentration, where 20 mL of zinc solution was added to 1 gram of natural zeolite, synthetic zeolite, soil 1, and soil 2. The Langmuir equation was used to describe the relationship between the adsorbed zinc and its concentration. Additionally, the Freundlich equation was used to describe the adsorption of ions. The Freundlich equation was found to be more important than the Langmuir equation, as the values of k and b in the Freundlich equation and the R2 values for natural and synthetic zeolites were higher in both soils. The second experiment involved kinetics. Samples of natural zeolite, synthetic zeolite, soil 1, and soil 2 were taken, weighing 40 grams, to which zinc with a concentration of (100, 1000 mgL-1) prepared from ZnSO4.7H2O was added. They were placed in plastic containers for periods of (0, 1, 5, 10, 20, 30, 40, 60 and 80 days). The zeolite and soil were kept moist at field capacity throughout the incubation period. Zinc was extracted using DTPA after each incubation period, with two replications, to study the rate of zinc release from zeolite and soil over time and its concentration in the solution. The results showed a decrease in the availability of added zinc with increasing incubation time. The highest concentration of available zinc was found when zinc was added to synthetic zeolite, reaching 346 micrograms Zn+2ml-1 at the end of the incubation period. The second-order equation was the most effective in describing the behavior of zinc and its reaction rate during the incubation period, representing the period of crop growth.

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confidence: 91%

Section: Using the Freundlich Equation To Describe Zinc Adsorptionmentioning

confidence: 99%

Adsorption Reaction and Kinetics of Zn on Zeolite Mineral Compared with Two Calcareous Soil

Al-Mashhdany,

Al-Hadethi

2023

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

show abstract

Characteristics of K+ and Nh4+ Adsorption and Desorption by Natural Bentonite and Zeolite Minerals Minerals

Cited by 1 publication

References 0 publications

Adsorption Reaction and Kinetics of Zn on Zeolite Mineral Compared with Two Calcareous Soil

Adsorption Reaction and Kinetics of Zn on Zeolite Mineral Compared with Two Calcareous Soil

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