Methods for Estimating the Parameters of Nonlinear Adsorption Isotherms of Langmuir and Freundlich Types from a Response Curve of Pulse Input of an Adsorbate

Adachi, Shuji; Panintrarux, Chaiya; Matsuno, Ryuichi

doi:10.1271/bbb.61.1626

Cited by 6 publications

(3 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this research, P had Langmuir adsorption isotherms on goethite-coated silica sand. When equilibrium was reached, PO 4 3− adsorption on goethite-coated silica sand was described as (Adachi et al 1997):…”

Section: Adsorption Isotherm Experimentsmentioning

confidence: 99%

Impact of Humic Acids on Phosphorus Retention and Transport

Chen

2020

J Soil Sci Plant Nutr

View full text Add to dashboard Cite

Phosphorus (P) loss is undesirable but prevalent in agricultural fields, as its leaching into natural water bodies usually triggers algae blooms and hypoxic conditions hazardous to aquatic ecosystems. In many developing countries, animal manure, which usually contains high levels of N, P, and organic matter, is directly applied as an economic fertilizer. While the manure-related greenhouse gas (GHG) emission issues have been widely discussed, the impacts of manure applications on nutrient leaching has been rarely discussed. In this study, we have investigated the impact of humic acid (HA) (i.e., a major derivative during manure degradation) on the adsorption and transport of P in goethite-coated silica sand through a series of batch isotherms and column experiments under steady-state flow conditions. The results show that 40 mg L −1 HA could lower the maximum adsorption capacity of goethite-coated silica (for P) by~60%, leading to an increase in P leaching by~70% in the media. This research demonstrates the negative impact that HA applications may have on P retention in agricultural fields.

show abstract

Section: Adsorption Isotherm Experimentsmentioning

confidence: 99%

Impact of Humic Acids on Phosphorus Retention and Transport

Chen

2020

J Soil Sci Plant Nutr

View full text Add to dashboard Cite

show abstract

“…e nonlinear forms of the Langmuir and Freundlich isotherm models can be expressed as follows [26,27].…”

Section: Adsorption Isothermsmentioning

confidence: 99%

Assessment of the Use of Epicarp and Mesocarp of Green Coconut for Removal of Fluoride Ions in Aqueous Solution

Canciam

Pereira

2019

International Journal of Chemical Engineering

View full text Add to dashboard Cite

Fruit consumption and processing result in considerable volumes of residual biomass. Transformation of this biomass into biosorbents offers an alternative for its reuse and disposal. As the green coconut shell is a waste often discarded in landfills and dumps, generating gases and leachate, two biosorbents were developed from the epicarp and mesocarp of green coconut to adsorb fluoride ions in aqueous solution. The kinetic experiments showed that sorption of fluoride ions reached equilibrium at 300 min for both epicarp and mesocarp at temperatures of 25°C, 35°C, and 45°C. The removal efficiency of fluoride ions varied from 66.25% (at 25°C) to 77.50% (at 45°C) for the epicarp and from 90% (at 25°C) to 97.50% (at 45°C) for the mesocarp. The thermodynamic parameters of the adsorption process showed that adsorption is a spontaneous, endothermic process for both biosorbents. The adsorption was classified as chemical, with the Langmuir isotherm model best suited to the adsorption isotherms data.

show abstract

“…37) Methods for estimating the parameters of nonlinear Langmuir and Freundlich adsorption isotherms from pulse response curves have also been proposed, based on both the migration rate of the adsorbate at constant concentration and the mean residence time of the adsorbate in the bed. 38) Chromatographic methods for preparing peptide mixtures from protein hydrolysate have also been examined. 39,40) The adsorption isotherms of several dipeptides on activated carbon were measured, and the applicability of the Polanyi adsorption potential theory was examined.…”

Section: Reactive Chromatographic Operationsmentioning

confidence: 99%

Engineering aspects of rate-related processes in food manufacturing

Adachi

2015

Bioscience, Biotechnology, and Biochemistry

Self Cite

View full text Add to dashboard Cite

Many rate-related phenomena occur in food manufacturing processes. This review addresses four of them, all of which are topics that the author has studied in order to design food manufacturing processes that are favorable from the standpoint of food engineering. They include chromatographic separation through continuous separation with a simulated moving adsorber, lipid oxidation kinetics in emulsions and microencapsulated systems, kinetic analysis and extraction in subcritical water, and water migration in pasta.

show abstract

Methods for Estimating the Parameters of Nonlinear Adsorption Isotherms of Langmuir and Freundlich Types from a Response Curve of Pulse Input of an Adsorbate

Cited by 6 publications

References 7 publications

Impact of Humic Acids on Phosphorus Retention and Transport

Impact of Humic Acids on Phosphorus Retention and Transport

Assessment of the Use of Epicarp and Mesocarp of Green Coconut for Removal of Fluoride Ions in Aqueous Solution

Engineering aspects of rate-related processes in food manufacturing

Contact Info

Product

Resources

About