Sorption of diclofenac by polystyrene microplastics: Kinetics, isotherms and particle size effects

Li, Juying; Huang, Xiaotong; Hou, Zhangming; Ding, Tengda

doi:10.1016/j.chemosphere.2021.133311

Cited by 27 publications

(15 citation statements)

References 35 publications

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“…This strong agreement between experimental data and the PSO kinetic model suggests that cell walls of M. aeruginosa have a variety of binding sites. The PSO model has been cited in other research as being a better fit for the kinetic data of DCF sorption onto various sorbents, which is consistent with our findings 66,70,72,73 …”

Section: Resultssupporting

confidence: 93%

Chemical activation of Microcystis aeruginosa biomass: a promising approach for enhanced diclofenac sorption and water treatment

Momin,

Nath,

Mahana

et al. 2023

J of Chemical Tech & Biotech

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BACKGROUNDDiclofenac (DCF), a widely used nonsteroidal anti‐inflammatory drug, has been detected in the environment. Its presence is of concern due to potential ecological impacts and health risks. The development of effective technologies for the removal of DCF from water is of paramount importance. The efficient removal of DCF from highly diluted solutions poses a further significant challenge. Microcystis aeruginosa, a rapidly growing cyanobacterium, possesses significant potential as a valuable biomass resource that is currently underutilized. This study investigates various pretreatments to enhance the adsorption capacity of nontoxic M. aeruginosa ACCMU‐118 biomass for DCF removal.RESULTSAlkali‐pretreated biomass achieved over 90% DCF removal at concentrations of 1000–5000 μg L−1. The modified biomass showed comparable efficiency in removing DCF from binary solutions containing heavy metals (Cd2+) or ibuprofen. Fourier transform infrared analysis revealed hydroxyl, carboxylic acid and alkene functional groups on the biomass surface contributing to DCF sorption. Chemical pretreatment enhanced binding site exposure, increasing DCF sorption capacity. Thermodynamic analysis confirmed the exothermic sorption and thermodynamically favorable process. Methanol regeneration allowed multiple sorption–desorption cycles, enhancing sustainability.CONCLUSIONThis cost‐effective approach demonstrates the potential of M. aeruginosa biomass for selective and efficient DCF removal from contaminated water sources. Chemical pretreatment expands the application potential of M. aeruginosa biomass as a biosorbent, showcasing its advantages in addressing the challenges of contaminated water treatment. © 2023 Society of Chemical Industry.

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Section: Resultssupporting

confidence: 93%

Chemical activation of Microcystis aeruginosa biomass: a promising approach for enhanced diclofenac sorption and water treatment

Momin,

Nath,

Mahana

et al. 2023

J of Chemical Tech & Biotech

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“…The kinetics of experimental adsorption data of CR on ZnS was analyzed utilizing three models. The first model is the pseudo-first-order model, which is frequently used to estimate the kinetics and is given as follows [ 31 , 32 , 33 , 34 ]:

, where

is the pseudo-first-order constant (min −1 ). The second model is the pseudo-second-order model, which is expressed as [ 35 ]:

, where

is the pseudo-second-order constant (g/mg·min).…”

Section: Methodsmentioning

confidence: 99%

Adsorption Study of Congo Red Dye from Synthetic Wastewater at Different Concentrations Using Zinc Sulfide Nanoparticles

et al. 2022

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Zinc sulfide (ZnS) nanoparticles were fabricated using the chemical precipitation method. The X-ray diffraction (XRD), Raman spectroscopy, and scanning electron microscopy (SEM) techniques were used to investigate the structural parameters of the formed ZnS. The hexagonal crystal structure of the Zn and ZnS phases was formed. The average crystallite size of the ZnS phase is 10.3 nm, which is much smaller than that of the Zn phase (54.5 nm). Several frequencies and phonon modes were detected in the Raman scattering spectrum belonging to the ZnS nanoparticles. The synthesized ZnS nanoparticles were used as catalysts to eliminate the Congo red (CR) dye, with different concentrations, from synthetic wastewater. The impact of the CR dye concentration and shaking period on the adsorption of CR was thoroughly investigated, and various adsorption kinetic models were tested. After 3 h of shaking, the adsorption efficiency reached 26.01% for 40 mg/L CR dye and 27.84% for 20 mg/L CR dye. The adsorption capacities of the CR dye in the presence of ZnS are 16% and 9% for 40 and 20 mg/L, respectively. Based on the correlation factor, the intraparticle diffusion kinetic model was considered the best of the tested models.

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“…Polyethyleneimine (PEI), a hydrosoluble cationic polyelectrolyte, has been recognized by its abundant amino groups [3]. Meanwhile, it has been extensively used to adsorb dyes [27], heavy metal ions [28], and pharmaceutical residues [29].…”

Section: Introductionmentioning

confidence: 99%

“…Owing to its broad applications, residual DS is found in groundwater and drinking water around the world [2]. Although DS can be degraded via natural and other auxiliary methods [3], residual DS in the environment is still a potential toxic contaminant. It can cause adverse gastrointestinal reactions and acute renal insufficiency [4].…”

Section: Introductionmentioning

confidence: 99%

Nanocellulose/chitosan biohybrid aerogel bead adsorbent for removal of diclofenac sodium from wastewater: preparation, characterization, and adsorption mechanism

Tang

Qiu

Zhang

et al. 2022

Preprint

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In this work, a novel nanocellulose/chitosan biohybrid aerogel (NCBA) bead adsorbent was successfully prepared from oxidized bamboo nanocellulose and chitosan to remove diclofenac sodium (DS) from wastewater. Fourier transform infrared spectroscopy, scanning electron microscopy, and X-ray photoelectron spectroscopy were used to characterize the preparation of NCBA bead adsorbent. The results demonstrated that the adsorption kinetics were well described by the pseudo-second-order model, and the adsorption isotherms were well fitted by the Sips isotherm model with the maximum adsorption capacity of 321.26 mg/g on DS, which is much higher than most of the previously reported works. The absorption mechanism was governed by electrostatic interaction and hydrogen bond interaction. Moreover, the resulting bead remained a high removal efficiency after 5 regeneration cycles. In summary, it had been proved that the aerogel bead was an efficient bio-sorbent for removing DS from aqueous solutions.

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Sorption of diclofenac by polystyrene microplastics: Kinetics, isotherms and particle size effects

Cited by 27 publications

References 35 publications

Chemical activation of Microcystis aeruginosa biomass: a promising approach for enhanced diclofenac sorption and water treatment

Chemical activation of Microcystis aeruginosa biomass: a promising approach for enhanced diclofenac sorption and water treatment

Adsorption Study of Congo Red Dye from Synthetic Wastewater at Different Concentrations Using Zinc Sulfide Nanoparticles

Nanocellulose/chitosan biohybrid aerogel bead adsorbent for removal of diclofenac sodium from wastewater: preparation, characterization, and adsorption mechanism

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