A study of the adsorption of titanium dioxide and zinc oxide nanoparticles on polyethylene microplastics and their desorption in aquatic media

Rozman, Ula; Klun, Barbara; Marolt, Gregor; Imperl, Jernej; Kalčíková, Gabriela

doi:10.1016/j.scitotenv.2023.164163

Cited by 19 publications

(4 citation statements)

References 66 publications

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“…These observations are in good agreement with the results of DLS showing smaller size aggregates in these waters (Figure 4C). The presence of carboxylic groups in DOM might contribute to more negative charges on the nZnO surface after ionization at pH 7, thereby causing significant decline in van der Waals forces [11]. An increase in SGW removal was observed as compared to NaCl-containing waters and SSW system.…”

Section: Role Of Dmsa Coating and Dom On Removal Of Nznomentioning

confidence: 93%

“…In contrast, the stronger interactions between the DOM and precipitate surface might enhance the particle stability due to electrostatic repulsion [13]. Previous studies [11,18] reported the increased stability of NPs in monovalent and divalent cations at different solution chemistries owing to electrostatic hindrance. In simulated waters, the presence of divalent ions effectively compresses the EDL around the particle than monovalent ions such as NaCl systems [23].…”

Section: Role Of Dom In Removal Of Uncoated Nznomentioning

confidence: 99%

“…Moreover, the process conditions, i.e., solution pH and electrolyte concentration, play an essential role in enhancing the efficiency of treatment process. Rozman et al demonstrated the enhanced mobility of TiO 2 and nZnO in the aquatic environment due to the adsorption onto microplastic surface [11]. Consequently, it is significant to explore the removal of ENPs from complex water environments, using the chemical coagulation process.…”

Section: Introductionmentioning

confidence: 99%

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Removal of Nano-Zinc Oxide (nZnO) from Simulated Waters by C/F/S—Focusing on the Role of Synthetic Coating, Organic Ligand, and Solution Chemistry

Khan,

Inam,

Yeom

et al. 2023

Processes

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Increased usage of nano-zinc oxide (nZnO) in different commercial fields has raised serious concerns regarding their discharge into the water streams containing natural and synthetic coating agents. Moreover, utilization of ground and surface water for drinking purposes is a common approach in many countries. Therefore, the removal of nZnO particles from water is essential to minimize the risk to the environment. The present research investigated the removal of nZnO from complex water matrices by conventional coagulation-flocculation-sedimentation (C/F/S) process using polyaluminum chloride (PACl) as coagulants. The result showed that removal of uncoated nZnO through sedimentation was efficient in waters containing divalent cations in the absence of dissolved organic matter (DOM). For the water containing higher salt concentration, PACl coagulant showed better removal performance with increasing coagulant dosage; however, synthetic organic coating agent and DOM significantly decreased the removal up to 75%. The surface potential of studied waters indicated that the addition of PACl affects the charge potential of nZnO particles resulting in charge neutralization. The result of the particle size analyzer revealed the presence of smaller particles with size of 430 nm even after C/F/S process, which may increase the possibility of particles release into aquatic environment. The results of the present study may help in understating the removal behavior of other coated nanoparticles during conventional water treatment.

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Section: Role Of Dmsa Coating and Dom On Removal Of Nznomentioning

confidence: 93%

Section: Role Of Dom In Removal Of Uncoated Nznomentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Removal of Nano-Zinc Oxide (nZnO) from Simulated Waters by C/F/S—Focusing on the Role of Synthetic Coating, Organic Ligand, and Solution Chemistry

Khan,

Inam,

Yeom

et al. 2023

Processes

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“…As an example, heavy metals, humic substances, and acetic acid in leachate affect the aggregation, electrostatic adsorption, and ion release of ZnO NPs, especially Cr( iii ) ions binding to hydroxyl groups on ZnO to generate ZnO–O bonds. 113 In addition to the combined exposure of multiple nanomaterials, 114 ZnO NPs can also adsorb with microplastics 115 but are limited by Zn 2+ , 116 as well as stimulate surface oxidation and degradation of microplastics. 117 Considering that ZnO NPs can act as both bioregulator products and exogenous nano-pollutants, the unknown risks to plants induced by exposure to multiple systems may be either toxicity mitigation or toxicity exacerbation (Table 1), implying that the field needs to be supported by more adequate research in the future.…”

Section: Uncertain Ecological Risks Of Np Composite Systems To Plantsmentioning

confidence: 99%

A critical review on the toxicity regulation and ecological risks of zinc oxide nanoparticles to plants

Kang,

Liu,

Weng

et al. 2024

Environ. Sci.: Nano

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Bismuth oxide nanoparticles as a promising adsorbent for removal of quetiapine: synthesis, characterization, and application

Dedecan,

Baylan,

İnci

2024

J of Chemical Tech & Biotech

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BACKGROUNDWithin the scope of this study, bismuth oxide (Bi2O3) nanoparticles have been synthesized by a simple method, and the usability of these nanoparticles as adsorbents has been investigated. For this purpose, Bi2O3 nanoparticles were synthesized by a chemical method. These particles were characterized by various methods such as Fourier transform infrared spectroscopy, Brunauer–Emmett–Teller surface area, scanning electron microscopy, and X‐ray diffraction. The nature of the synthesized nanoparticles was confirmed by characterization results and the synthesized particles were found to be nanoscale. As a result of the characterization, the average particle diameters and surface areas were found to be 22.24, 32.24 and 49.98 nm, and 5.95, 3.54 and 0.75 m2 g−1 for different calcination temperatures of 105, 250 and 600 °C, respectively. Adsorption parameters such as initial quetiapine concentration, bismuth oxide nanoparticle dosage, temperature, equilibrium contact time, and pH were also studied. Moreover, kinetic, isotherm, and thermodynamics modeling of adsorption have been performed to account for the adsorption mechanism of quetiapine by Bi2O3 nanoparticles.RESULTSThe thermodynamic study has specified that adsorption has been spontaneous and exothermic. The kinetic study has pointed out that a pseudo‐second‐order model (R2 = 0.9853) has been favorable to the data. Furthermore, a Freundlich isotherm model (R2 = 0.8258) has been better fitted to the experimental adsorption results. The maximum adsorption capacity and percentage of adsorption values were 27.38 mg g−1 and 76.81%, respectively.CONCLUSIONThe outcomes demonstrate that synthesized Bi2O3 nanoparticle is an influential adsorbent for removing quetiapine. Also, the obtained results enabled us to estimate the possibility of using Bi2O3 nanoparticles to remove active pharmaceutical ingredients by adsorption. © 2024 The Author(s). Journal of Chemical Technology and Biotechnology published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry (SCI).

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A study of the adsorption of titanium dioxide and zinc oxide nanoparticles on polyethylene microplastics and their desorption in aquatic media

Cited by 19 publications

References 66 publications

Removal of Nano-Zinc Oxide (nZnO) from Simulated Waters by C/F/S—Focusing on the Role of Synthetic Coating, Organic Ligand, and Solution Chemistry

Removal of Nano-Zinc Oxide (nZnO) from Simulated Waters by C/F/S—Focusing on the Role of Synthetic Coating, Organic Ligand, and Solution Chemistry

A critical review on the toxicity regulation and ecological risks of zinc oxide nanoparticles to plants

Bismuth oxide nanoparticles as a promising adsorbent for removal of quetiapine: synthesis, characterization, and application

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