Assessment of reusable graphene wool adsorbent for the simultaneous removal of selected 2-6 ringed polycyclic aromatic hydrocarbons from aqueous solution.

التفاصيل البيبلوغرافية
العنوان:	Assessment of reusable graphene wool adsorbent for the simultaneous removal of selected 2-6 ringed polycyclic aromatic hydrocarbons from aqueous solution.
المؤلفون:	Adeola AO; Faculty of Natural and Agricultural Sciences, Department of Chemistry, University of Pretoria, Pretoria, South Africa., Forbes PBC; Faculty of Natural and Agricultural Sciences, Department of Chemistry, University of Pretoria, Pretoria, South Africa.
المصدر:	Environmental technology [Environ Technol] 2022 Mar; Vol. 43 (8), pp. 1255-1268. Date of Electronic Publication: 2020 Sep 24.
نوع المنشور:	Journal Article
اللغة:	English
بيانات الدورية:	Publisher: Taylor & Francis Country of Publication: England NLM ID: 9884939 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1479-487X (Electronic) Linking ISSN: 09593330 NLM ISO Abbreviation: Environ Technol Subsets: MEDLINE
أسماء مطبوعة:	Publication: 2008- : Oxford : Taylor & Francis Original Publication: London : Publications Division, Selper Ltd., 1990-
مواضيع طبية MeSH:	Graphite/chemistry , Polycyclic Aromatic Hydrocarbons/analysis , Water Pollutants, Chemical*/chemistry, Adsorption ; Animals ; Humans ; Water ; Wool/chemistry
مستخلص:	The United States Environmental Protection Agency categorized polycyclic aromatic hydrocarbons (PAHs) as hazardous to humans upon acute and/or chronic exposure. This study investigated the simultaneous adsorption of several PAHs onto graphene wool (GW), thereby providing holistic insights into the competitive adsorption of PAHs onto graphene-based materials. SEM, TEM and FTIR provided evidence for the adsorption of PAHs and successful regeneration of the adsorbent accompanied by distinct morphological changes. Isotherm experiments revealed that adsorption of PAHs was significantly influenced by hydrophobic interactions between the sorbate and hydrophobic surface of GW. The Freundlich multilayer isotherm model best fit the experimental data obtained for both multi-component PAH and single-solute experiments as indicated by the Error Sum of Squares (SSE) obtained from nonlinear regression analysis. Experiments revealed that competitive adsorption had a limiting effect on the overall adsorption capacity as q max and K d were higher in single-solute than multi-component PAH experiments. The results suggest that partition distribution coefficients ( K d ) between the solid-liquid interphase played a significant role in the overall adsorption and a positive correlation between K d and Log K ow of PAHs was established in single-solute experiments. Sorption-desorption experiments revealed that PAHs were adsorbed with a maximum removal efficiency of 100% at an optimum GW dosage of 2 g/L. Adsorption thermodynamics revealed that PAH adsorption onto GW is spontaneous and endothermic. The adsorbent was regenerated and reused for up to six times and its efficiency remained fairly constant.
فهرسة مساهمة:	Keywords: Polycyclic aromatic hydrocarbons; aqueous solution; competitive sorption; decontamination; graphene wool
المشرفين على المادة:	0 (Polycyclic Aromatic Hydrocarbons) 0 (Water Pollutants, Chemical) 059QF0KO0R (Water) 7782-42-5 (Graphite)
تواريخ الأحداث:	Date Created: 20200914 Date Completed: 20220315 Latest Revision: 20220315
رمز التحديث:	20240628
DOI:	10.1080/09593330.2020.1824024
PMID:	32924852
قاعدة البيانات:	MEDLINE

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تدمد:	1479-487X
DOI:	10.1080/09593330.2020.1824024