Electrochemical determination of nitroaromatic explosives at boron-doped diamond/graphene nanowall electrodes: 2,4,6-trinitrotoluene and 2,4,6-trinitroanisole in liquid effluents

Anna Dettlaff , P. Jakóbczyk , M. Ficek , B. Wilk , M. Szala , J. Wojtas , Tadeusz Ossowski , R. Bogdanowicz

Abstract

The study is devoted to the electrochemical detection of trace explosives on boron-doped diamond/graphene nanowall electrodes (B:DGNW). The electrodes were fabricated in a one-step growth process using chemical vapour deposition without any additional modifications. The electrochemical investigations were focused on the determination of the important nitroaromatic explosive compounds, 2,4,6-trinitrotoluene (TNT) and 2,4,6-trinitroanisole (TNA). The distinct reduction peaks of both studied compounds were observed regardless of the pH value of the solution. The reduction peak currents were linearly related to the concentration of TNT and TNA in the range from 0.05–15 ppm. Nevertheless, two various linear trends were observed, attributed respectively to the adsorption processes at low concentrations up to the diffusional character of detection for larger contamination levels. The limit of detection of TNT and TNA is equal to 73 ppb and 270 ppb, respectively. Moreover, the proposed detection strategy has been applied under real conditions with a significant concentration of interfering compounds – in landfill leachates. The proposed bare B:DGNW electrodes were revealed to have a high electroactive area towards the voltammetric determination of various nitroaromatic compounds with a high rate of repeatability, thus appearing to be an attractive nanocarbon surface for further applications.
Author Anna Dettlaff
Anna Dettlaff,,
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, P. Jakóbczyk
P. Jakóbczyk,,
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, M. Ficek
M. Ficek,,
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, B. Wilk
B. Wilk,,
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, M. Szala
M. Szala,,
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, J. Wojtas
J. Wojtas,,
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, Tadeusz Ossowski (FCh / DACh / LSCh)
Tadeusz Ossowski,,
- Laboratory of Supramolecular Chemistry
, R. Bogdanowicz
R. Bogdanowicz,,
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Journal seriesJournal of Hazardous Materials, ISSN 0304-3894, e-ISSN 1873-3336, (N/A 200 pkt)
Issue year2020
Vol387
Pages1-9
Publication size in sheets0.5
Article number121672
Keywords in EnglishTrace explosives determination, carbon nanowalls, TNT, landfill leachates, DPV
ASJC Classification2304 Environmental Chemistry; 2305 Environmental Engineering; 2307 Health, Toxicology and Mutagenesis; 2310 Pollution; 2311 Waste Management and Disposal
DOIDOI:10.1016/j.jhazmat.2019.121672
URL https://doi.org/10.1016/j.jhazmat.2019.121672
Languageen angielski
LicenseOther; published final; Uznanie Autorstwa (CC-BY); with publication
Score (nominal)200
Score sourcejournalList
ScoreMinisterial score = 200.0, 28-01-2020, ArticleFromJournal
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2018 = 2.055; WoS Impact Factor: 2018 = 7.65 (2) - 2018=7.336 (5)
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