Spherical DNA for Probing Wettability of Microplastics

Zandieh, Mohamad; Hogan, Úna E.; Smith, Rodney D. L.; Liu, Juewen

doi:10.1021/acs.langmuir.2c03417

Cited by 5 publications

(3 citation statements)

References 54 publications

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“…DNA oligonucleotides have been extensively used in nanotechnology over the past few decades owing to their programmable structure, low cost, high stability, and their unique base-pairing rule. − Adsorption of DNA on nanomaterials has been applied for molecular recognition, , catalysis, and materials characterization …”

Section: Introductionmentioning

confidence: 99%

Metal-Mediated DNA Adsorption on Carboxylated, Hydroxylated, and Hydrogenated Nanodiamonds

Zandieh

Liu

2023

Langmuir

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Nanodiamonds (NDs) have attracted considerable attention owing to their quantum properties and versatility in biological applications. In this study, we systematically investigated the adsorption of DNA oligonucleotides onto NDs with three types of surface groups: carboxylated (COOH-), hydroxylated (OH-), and hydrogenated (H-). Among them, only the H-NDs showed fluorescence quenching property that is useful for real-time DNA adsorption kinetic studies. The effect of common metal ions on DNA adsorption was studied. In the presence of Na + , the order of DNA adsorption efficiency was H-> OH-> COOH-, whereas all the NDs showed a similar DNA adsorption efficiency in the presence of divalent metal ions such as Ca 2+ and Zn 2+ . Desorption studies revealed that hydrogen bonding and metal-mediated interactions were dominant for the adsorption of DNA, and the H-NDs exhibited extraordinarily tight DNA adsorption. Finally, a fluorescently labeled DNA was adsorbed on NDs for DNA detection, and the COOH-NDs had the highest target specificity, and a detection limit of 1.4 nM was achieved. This study indicates the feasibility of using metal ions to mediate the physical adsorption of DNA to NDs and compares various NDs with graphene oxide for fundamental understanding.

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Section: Introductionmentioning

confidence: 99%

Metal-Mediated DNA Adsorption on Carboxylated, Hydroxylated, and Hydrogenated Nanodiamonds

Zandieh

Liu

2023

Langmuir

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“…While a growing number of studies have recognized and considered adsorption of DNA onto MPs, ,,− a more extensive body of work has considered DNA adsorption onto soil components (summarized in Pietramellara et al and Yu et al) , which can help guide future studies on the topic. However, these soil components may have some different adsorbent behavior compared to MPs.…”

Section: Resultsmentioning

confidence: 99%

eDNA Adsorption onto Microplastics: Impacts of Water Chemistry and Polymer Physiochemical Properties

Müller,

Kirtane,

Schefer

et al. 2024

Environ. Sci. Technol.

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Adsorption of biomacromolecules onto polymer surfaces, including microplastics (MPs), occurs in multiple environmental compartments, forming an ecocorona. Environmental DNA (eDNA), genetic material shed from organisms, can adsorb onto MPs which can potentially either (1) promote long-range transport of antibiotic resistant genes or (2) serve to gain insights into the transport pathways and origins of MPs by analyzing DNA sequences on MPs. However, little is known about the capacity of MPs to adsorb eDNA or the factors that influence sorption, such as polymer and water chemistries. Here we investigated the adsorption of extracellular linear DNA onto a variety of model MP fragments composed of three of the most environmentally prevalent polymers (polyethylene, polyethylene terephthalate, and polystyrene) in their pristine and photochemically weathered states. Batch adsorption experiments in a variety of water chemistries were complemented with nonlinear modeling to quantify the rate and extent of eDNA sorption. Ionic strength was shown to strongly impact DNA adsorption by reducing or inhibiting electrostatic repulsion. Polyethylene terephthalate exhibited the highest adsorption capacity when normalizing for MP specific surface area, likely due to the presence of ester groups. Kinetics experiments showed fast adsorption (majority adsorbed under 30 min) before eventually reaching equilibrium after 1–2 h. Overall, we demonstrated that DNA quickly binds to MPs, with pseudo-first- and -second-order models describing adsorption kinetics and the Freundlich model describing adsorption isotherms most accurately. These insights into DNA sorption onto MPs show that there is potential for MPs to act as vectors for genetic material of interest, especially considering that particle-bound DNA typically persists longer in the environment than dissolved DNA.

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“…For example, our team recently observed that upon soaking microplastics in water, the adsorption efficiency of biomolecules such as spherical DNA dramatically changed due to the change in the wettability of microplastics. [ 159 ] Such adsorption studies should therefore be carried out systematically when assessing potential degradation catalysts for different microplastic substrates. These results can inform better experimental designs and, potentially, the engineering of more effective catalysts in terms of binding and activity. Scaling up and practical implementation of biotic, abiotic, and mixed catalytic degradation techniques are areas that require further investigation and development.…”

Section: Summary and Future Perspectivesmentioning

confidence: 99%

Catalytic and biocatalytic degradation of microplastics

Zandieh,

Griffiths,

Waldie

et al. 2023

Exploration

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In recent years, there has been a surge in annual plastic production, which has contributed to growing environmental challenges, particularly in the form of microplastics. Effective management of plastic and microplastic waste has become a critical concern, necessitating innovative strategies to address its impact on ecosystems and human health. In this context, catalytic degradation of microplastics emerges as a pivotal approach that holds significant promise for mitigating the persistent effects of plastic pollution. In this article, we critically explored the current state of catalytic degradation of microplastics and discussed the definition of degradation, characterization methods for degradation products, and the criteria for standard sample preparation. Moreover, the significance and effectiveness of various catalytic entities, including enzymes, transition metal ions (for the Fenton reaction), nanozymes, and microorganisms are summarized. Finally, a few key issues and future perspectives regarding the catalytic degradation of microplastics are proposed.

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Spherical DNA for Probing Wettability of Microplastics

Cited by 5 publications

References 54 publications

Metal-Mediated DNA Adsorption on Carboxylated, Hydroxylated, and Hydrogenated Nanodiamonds

Metal-Mediated DNA Adsorption on Carboxylated, Hydroxylated, and Hydrogenated Nanodiamonds

eDNA Adsorption onto Microplastics: Impacts of Water Chemistry and Polymer Physiochemical Properties

Catalytic and biocatalytic degradation of microplastics

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