Insight into the adsorption mechanisms of ionizable imidazolinone herbicides in sediments: Kinetics, adsorption model, and influencing factors

Hu, Mingfeng; Liu, Li; Hou, Ning; Li, Xuesheng; Zeng, Dongqiang; Tan, Huihua

doi:10.1016/j.chemosphere.2021.129655

Cited by 31 publications

(8 citation statements)

References 32 publications

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“…A significant difference between the adsorption and desorption isotherm curves indicates that the desorption process is not a reversible process of adsorption and there is an obvious hysteresis effect (Figure 3(b)). Here the hysteresis coefficient is defined as the ratio of the adsorption strength (1/n), expressed as HI ¼ (1=n des )=(1=n ads ) (where n and n des present the constants during the adsorption and desorption process fitted by Freundlich model) (Hu et al 2021). When HI ,0.7, the desorption rate is slower than the absorption rate, which is a positive hysteresis, meaning the acetic acid has a strong and irreversible interaction with AF 5 .…”

Section: Desorption Isothermmentioning

confidence: 99%

Efficient removal of acetic acid by a regenerable resin-based spherical activated carbon

Sun

Zhao

et al. 2021

Water Science and Technology

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Carboxylic acids are the main pollutant of industrial wastewater during the Advanced Oxidation Process (AOPs). In this study, we here study a resin-based spherical activated carbon (RSAC, AF5) as an adsorbent and use acetic acid as a model substrate for adsorption investigation. The pH = 3, temperature = 298 K were fixed by batch technique. The pseudo-second-order kinetic model, the intraparticle and external models are fitted well, and it was found that the adsorption of acetic acid onto AF5 was controlled by liquid film diffusion. Freundlich model indicates the adsorption process is heterogeneous multi-molecular layer adsorption on the surface. AF5 shows good regenerative ability; the recovery rate of adsorption capacity is ∼88% after 5 cycles. And COD adsorption removal rate can be maintained 100% for over 35 h in an actual AOPs effluent, and it can be eluted for 100% after 8 h by 0.8wt% NaOH. The characterizations, including XRF, XRD, TG/DSC,FTIR, SEM and N2 adsorption, show that the excellent adsorption performance is mainly due to the microporous structure and large specific surface area (1,512.88 m2/g), the adsorption mechanism mainly including pore filling effect and electrostatic attraction. After five adsorption-recycles, AF5's pore characteristic does not change significantly. This study provided a scientific basis for the wastewater standard discharge process of AOPs coupled adsorption.

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Section: Desorption Isothermmentioning

confidence: 99%

Efficient removal of acetic acid by a regenerable resin-based spherical activated carbon

Sun

Zhao

et al. 2021

Water Science and Technology

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“…The goodness-of-fit assessment of the kinetic models was performed by statistical enumeration as described in Hu et al (2021), andTorabi et al (2021). Coefficient of determination (R 2 value) and Scaled Root Mean Squared Error (SRMSE) were applied to determine the model accuracy.…”

Section: Statistical Interpretationmentioning

confidence: 99%

Dissipation Kinetics, Residue Modeling and Human Intake of Endosulfan Applied to Okra (Abelmoschus Esculentus)

Nath

Komala

Fantke³

et al. 2022

SSRN Journal

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“…The values of ∆H were calculated from the slope and ∆S from the intercept of the linear curve of ln K and 1/T. Adsorption isotherm models were used to predict the distribution of CBZ at adsorption equilibrium between solid−phase concentration and aqueous−phase concentration between liquid and solid phases [31,32]. To further explore the adsorption mechanism of CBZ by the MCNTs, the adsorption isotherm study results for the CBZ adsorption process were shown in Figure 1 with the model fitting parameters summarized in the Supplementary Materials, Table S2.…”

Section: Adsorption Model Investigationmentioning

confidence: 99%

The Potential for PE Microplastics to Affect the Removal of Carbamazepine Medical Pollutants from Aqueous Environments by Multiwalled Carbon Nanotubes

Sheng

Wang

Zhang

et al. 2021

Toxics

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Microplastics are ubiquitous in aquatic environments and interact with other kinds of pollutants, which affects the migration, transformation, and fate of those other pollutants. In this study, we employ carbamazepine (CBZ) as the contaminant to study the influence of polyethylene (PE) microplastics on the adsorption of CBZ pollutants by multiwalled carbon nanotubes (MCNTs) in aqueous solution. The adsorption capacity of CBZ by MCNTs in the presence of PE microplastics was obviously lower than that by MCNTs alone. The influencing factors, including the dose of microplastics, pH, and CBZ solution concentration, on the adsorption of CBZ by MCNTs and MCNTs−PE were thoroughly investigated. The adsorption rate of CBZ by MCNTs decreased from 97.4% to 90.6% as the PE microplastics dose increased from 2 g/L to 20 g/L. This decrease occurred because the MCNTs were coated on the surface of the PE microplastics, which further decreased the effective adsorption area of the MCNTs. This research provides a framework for revealing the effect of microplastics on the adsorption of pollutants by carbon materials in aqueous environments.

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Insight into the adsorption mechanisms of ionizable imidazolinone herbicides in sediments: Kinetics, adsorption model, and influencing factors

Cited by 31 publications

References 32 publications

Efficient removal of acetic acid by a regenerable resin-based spherical activated carbon

Efficient removal of acetic acid by a regenerable resin-based spherical activated carbon

Dissipation Kinetics, Residue Modeling and Human Intake of Endosulfan Applied to Okra (Abelmoschus Esculentus)

The Potential for PE Microplastics to Affect the Removal of Carbamazepine Medical Pollutants from Aqueous Environments by Multiwalled Carbon Nanotubes

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