Výsledky vyhledávání - "Okechukwu Jonathan Okonkwo"

Akademický článek

Unveiling the hidden threat: spatiotemporal trends and source apportionments of per-and polyfluorinated alkyl substances in wastewater treatment plants in South Africa

Autor: Moloko Florence Morethe, Lizzy Mpenyana-Monyatsi, Adegbenro Peter Daso, Okechukwu Jonathan Okonkwo

Publikováno v: Water Science and Technology, Vol 89, Iss 1, Pp 71-88 (2024)

At least 11 per-and polyfluorinated alkyl substances (PFASs) were more prevalent during the dry season, whereas only PFBA, L-PFBS, L-PFOS, and PFOA were prevalent during the wet season in 11 WWTPs. The ∑21 PFAS levels in the influent and the efflue

Externí odkaz: https://doaj.org/article/faa3a9eb5b144e4f94497374fff24440

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Akademický článek

Comparison of the extractability of organophosphorus flame retardants in landfill media using organic and green solvents

Autor: Innocentia Velaphi Sibiya, Okechukwu Jonathan Okonkwo

Publikováno v: Scientific Reports, Vol 12, Iss 1, Pp 1-11 (2022)

Abstract Organic solvents are mainly used in the extraction of organophosphorus flame retardants (OPFRs) because of their availability and having been tested as good extracting solvents for most environmental pollutants. However, organic solvents are

Externí odkaz: https://doaj.org/article/23398faaf9bc42a2ad0e39107f8211f9

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Akademický článek

Propensity of Tagetes erecta L., a Medicinal Plant Commonly Used in Diabetes Management, to Accumulate Perfluoroalkyl Substances

Autor: John Baptist Nzukizi Mudumbi, Adegbenro Peter Daso, Okechukwu Jonathan Okonkwo, Seteno Karabo Obed Ntwampe, Tandi E. Matsha, Lukhanyo Mekuto, Elie Fereche Itoba-Tombo, Adewole T. Adetunji, Linda L. Sibali

Publikováno v: Toxics, Vol 7, Iss 1, p 18 (2019)

It has been extensively demonstrated that plants accumulate organic substances emanating from various sources, including soil and water. This fact suggests the potentiality of contamination of certain vital bioresources, such as medicinal plants, by

Externí odkaz: https://doaj.org/article/1641e6d76dab486faed505d240979de5

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Synthesis and application of choline chloride based deep eutectic solvents in liquid-liquid and solid-liquid assisted extraction of organophosphorus flame retardants from landfill leachate and sediment

Autor: Innocentia Velaphi Sibiya, Adegbenro Peter Daso, Okechukwu Jonathan Okonkwo

Publikováno v: Sibiya, I V, Daso, A P & Okonkwo, O J 2022, ' Synthesis and application of choline chloride based deep eutectic solvents in liquid-liquid and solid-liquid assisted extraction of organophosphorus flame retardants from landfill leachate and sediment ', International Journal of Environmental Analytical Chemistry, pp. 1-19 . https://doi.org/10.1080/03067319.2022.2128793

The extraction of organic pollutants from environmental samples using green solvents has received a lot of interest recently. Simply said, this is due to their extremely low toxicity and volatility when compared to the common organic solvents. Theref

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d551c84edbe7d13dc8f1d7bbb5fb5029
https://purehost.bath.ac.uk/ws/files/269842015/IJEAC_accepted_Manscript.pdf

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A review on levels of polychlorinated naphthalenes in matrices with emphasis on knowledge and research gaps priorities in Africa

Autor: Vhodaho Nevondo, Okechukwu Jonathan Okonkwo

Publikováno v: Journal of Environmental Exposure Assessment. 1:10

Polychlorinated naphthalenes (PCNs) were listed as Persistent organic pollutants in the Stockholm Convention, in May 2015, because of their adverse health and environmental effects. PCNs production began in the early 1900s when they were used extensi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::32b443a4022851980831357b821cdcaf
https://doi.org/10.20517/jeea.2022.02

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Pre-concentration of toxic metals using electrospun amino-functionalized nylon-6 nanofibre sorbent

Autor: Darko, G., Sobola, A., Adewuyi, S., Okechukwu Jonathan Okonkwo, Torto, N.

Publikováno v: South African Journal of Chemistry, Volume: 65, Pages: 14-22, Published: 2012
South African Journal of Chemistry; Vol 65 (2012); 14-22
Scopus-Elsevier

This paper presents a new approach for pre-concentrating toxic metals (As, Cd, Ni and Pb) in aqueous environments using an amino-functionalized electrospun nanofibre sorbent. The sorbent, composed of nanofibres of average diameter 80 ± 10 nm and spe

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::2006243504553c2242820aeed3251b74
http://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S0379-43502012000100004&lng=en&tlng=en

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