Sorption and desorption kinetics of chlorophenols in hexadecyltrimethyl ammonium-montmorillonites and their model analysis

Kim, Jihoon; Shin, Won Sik; Kim, Younghun; Choi, Sang-June; Jo, Wan-Keun; Song, Dong‐Ik

doi:10.1007/bf02705665

Cited by 10 publications

(5 citation statements)

References 30 publications

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Section: Sse =mentioning

confidence: 99%

“…Two-compartment first order model (TCFOKM) shows the fast and the slow adsorption fractions (f 1 and f 2 ) and rates (k 1 and k 2 ), respectively [35,36]. Kim et al [35] reported that the TCFOKM could successively analyze the sorption kinetics of 2-chlorophenol on hexadecyltrimethyl ammonium montmorillonites. Kwak et al [36] also reported the better expectation of TCFOKM than other models such as PFOKM and PSOKM for kinetics analysis of Cd and Pb sorption onto three natural sediments.…”

Section: Sse =mentioning

confidence: 99%

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Adsorption of As and Pb by Stone Powder/Chitosan/Maghemite Composite Beads (SCM Beads): Kinetics and Column Study

Song

2023

Processes

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Adsorption kinetics of As and Pb onto composite beads synthesized with stone powder, chitosan, and maghemite (SCM beads) with weight ratio of 1:1:0.5 were investigated in batch mode. Several kinetic models such as pseudo-first order kinetic model (PFOKM), pseudo-second order kinetic model (PSOKM), two compartment first order kinetic model (TCFOKM), and modified two compartment first order kinetic model (MTCFOKM) were utilized to analyze the kinetics. Although the beads had low specific surface area and pore volume, MTCFOKM, one of two compartment models, could predict the most accurately because the As and Pb were adsorbed onto at least two kinds of adsorption sites such as functional groups in chitosan and Fe in maghemite. In MTCFOKM, both the fast adsorption fraction (f1’) and the fast adsorption constant (k1’) for Pb were higher than those for As. Therefore, the equilibrium time (teq) for Pb adsorption was shorter than that for As adsorption, indicating that Pb adsorption was more affinitive than As adsorption onto SCM beads (especially maghemite). Column study with a bed column reactor packed with the SCM beads was also conducted. For column study, the effect of flow rate and pore volume on removal efficiency of As and Pb was also investigated. Three models such as the Thomas, Adams-Bohart (A-B), and Yoon-Nelson (Y-N) models were used to fit the column experimental data to analyze the breakthrough curves and the saturation time. Both Thomas and Y-N models were most appropriate. Conclusively, the SCM beads are suitable for adsorption treatment of As and Pb from contaminated groundwater and are particularly effective in Pb removal.

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Section: Sse =mentioning

confidence: 99%

Section: Sse =mentioning

confidence: 99%

Adsorption of As and Pb by Stone Powder/Chitosan/Maghemite Composite Beads (SCM Beads): Kinetics and Column Study

Song

2023

Processes

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“…Phenols and their chlorinated forms are representatives of ionizable organic compounds (IOCs) [83]. This means variation of solution pH can affect 2-CP speciation as well as surface charges on the adsorbents.…”

Section: Ph and Zeta Potential Influencementioning

confidence: 99%

Can metal organic frameworks outperform adsorptive removal of harmful phenolic compound 2-chlorophenol by activated carbon?

Azmi

Ladewig

2020

Chemical Engineering Research and Design

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Removal of persistent organic compounds from aqueous solutions is generally achieved using adsorbent like activated carbon (AC) but it suffers from limited adsorption capacity due to low surface area. This paper describes a pioneering work on the adsorption of an organic pollutant, 2-chlorophenol (2-CP) by two MOFs with high surface area and water stability; MIL-101 and its amino-derivative, MIL-101-NH 2 .Although MOFs have higher surface area than AC, the latter was proven better having the highest equilibrium 2-CP uptake (345 mg.g -1), followed by MIL-101 (121 mg.g -1 ) and MIL-101-NH 2 (84 mg.g -1 ). Used MIL-101 could be easily regenerated multiple times by washing with ethanol and even showed improved adsorption capacity after each washing cycle. These results can open the doors to meticulous adsorbent selection for treating 2-CP-contaminated water File list (2) download file view on ChemRxiv manuscript.pdf (472.28 KiB) download file view on ChemRxiv SI.pdf (1.85 MiB) Article Can metal organic frameworks outperform adsorptive removal of harmful phenolic compound 2-chlorophenol by activated carbon?

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“…Since water can potentially form hydrogen bonds with the sites on MIL-101, access to remaining sites is blocked which may explain the reason for its superficial adsorption performance. Phenols and their chlorinated forms are representatives of ionizable organic compounds (IOCs) (Kim et al, 2005). This means variation of solution pH can affect 2-CP speciation as well as surface charges on the adsorbents.…”

Section: Ph and Zeta Potential Influencementioning

confidence: 99%

Can Metal Organic Frameworks Outperform Adsorptive Removal of Harmful Phenolic Compound 2-Chlorophenol by Activated Carbon?

Azmi¹,

Ladewig

2019

Preprint

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Abstract: Removal of persistent organic compounds from aqueous solutions is generally achieved using adsorbent like activated carbon (AC) but it suffers from limited adsorption capacity due to low surface area. This paper describes a pioneering work on the adsorption of an organic pollutant, 2-chlorophenol (2-CP) by two MOFs with high surface area and water stability; MIL-101 and its amino-derivative, MIL-101-NH2. Although MOFs have higher surface area than AC, the latter was proven better having the highest equilibrium 2-CP uptake (345 mg.g-1), followed by MIL-101 (121 mg.g-1) and MIL-101-NH2 (84 mg.g-1). Used MIL-101 could be easily regenerated multiple times by washing with ethanol and even showed improved adsorption capacity after each washing cycle. These results can open the doors to meticulous adsorbent selection for treating 2-CP-contaminated water

show abstract

Sorption and desorption kinetics of chlorophenols in hexadecyltrimethyl ammonium-montmorillonites and their model analysis

Cited by 10 publications

References 30 publications

Adsorption of As and Pb by Stone Powder/Chitosan/Maghemite Composite Beads (SCM Beads): Kinetics and Column Study

Adsorption of As and Pb by Stone Powder/Chitosan/Maghemite Composite Beads (SCM Beads): Kinetics and Column Study

Can metal organic frameworks outperform adsorptive removal of harmful phenolic compound 2-chlorophenol by activated carbon?

Can Metal Organic Frameworks Outperform Adsorptive Removal of Harmful Phenolic Compound 2-Chlorophenol by Activated Carbon?

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