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Adsorption of Linear and Spherical DNA Oligonucleotides onto Microplastics

dc.contributor.authorZandieh, Mohamad
dc.contributor.authorPatel, Kshiti
dc.contributor.authorLiu, Juewen
dc.date.accessioned2025-09-17T13:44:26Z
dc.date.available2025-09-17T13:44:26Z
dc.date.issued2022-01-30
dc.descriptionThis document is the Accepted Manuscript version of a Published Work that appeared in final form in Langmuir, copyright © American Chemical Society after peer review and technical editing by publisher. To access the final edited and published work see https://doi.org/10.1021/acs.langmuir.1c03190
dc.description.abstractMicroplastic pollution of water and food chains can endanger human health. It has been reported that environmental DNA can be carried by microplastics and spread into the ecosystem. To better comprehend the interactions between microplastics and DNA, we herein investigated the adsorption of DNA oligonucleotides on a few important microplastics. The microplastics were prepared using common plastic objects made of polyethylene (PE), polypropylene (PP), polystyrene (PS), polyvinyl chloride (PVC), composite of PS/PVC, and polyethylene terephthalate (PET). The effect of environmentally abundant metal ions such as Na+, Mg2+, and Ca2+ on the adsorption was also studied. Among the microplastics, PET and PS had the highest efficiency for the adsorption of linear DNA, likely due to the interactions provided by their aromatic rings. The study of DNA desorption from PET revealed the important role of hydrogen bonding and metal-mediated adsorption, while van der Waals force and hydrophobic interactions were also involved in the adsorption mechanism. The adsorption of spherical DNA (SNA) made of a high density of DNA coated on gold nanoparticles (AuNPs) was also studied, where the adsorption affinity order was found to be PET > PS/PVC > PS. Moreover, a tighter DNA adsorption was achieved in the presence of Ca2+ and Mg2+ compared to Na+.
dc.identifier.urihttps://doi.org/10.1021/acs.langmuir.1c03190
dc.identifier.uri10.1021/acs.langmuir.1c03190
dc.identifier.urihttps://hdl.handle.net/10012/22453
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.relation.ispartofseriesLangmuir; 38(5)
dc.rightsAttribution-NonCommercial-ShareAlike 2.5 Canadaen
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/2.5/ca/
dc.titleAdsorption of Linear and Spherical DNA Oligonucleotides onto Microplastics
dc.typeArticle
dcterms.bibliographicCitationZandieh, M., Patel, K., & Liu, J. (2022). Adsorption of linear and spherical DNA oligonucleotides onto microplastics. Langmuir, 38(5), 1915–1922. https://doi.org/10.1021/acs.langmuir.1c03190
uws.contributor.affiliation1Faculty of Science
uws.contributor.affiliation2Chemistry
uws.peerReviewStatusReviewed
uws.scholarLevelFaculty
uws.typeOfResourceTexten

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